/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/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:46:06,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:46:06,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:46:06,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:46:06,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:46:06,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:46:06,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:46:06,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:46:06,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:46:06,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:46:06,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:46:06,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:46:06,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:46:06,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:46:06,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:46:06,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:46:06,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:46:06,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:46:06,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:46:06,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:46:06,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:46:06,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:46:06,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:46:06,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:46:06,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:46:06,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:46:06,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:46:06,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:46:06,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:46:06,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:46:06,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:46:06,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:46:06,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:46:06,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:46:06,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:46:06,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:46:06,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:46:06,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:46:06,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:46:06,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:46:06,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:46:06,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:46:07,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:46:07,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:46:07,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:46:07,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:46:07,027 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:46:07,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:46:07,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:46:07,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:46:07,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:46:07,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:46:07,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:46:07,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:46:07,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:46:07,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:46:07,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:46:07,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:46:07,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:46:07,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:46:07,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:46:07,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:46:07,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:46:07,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:46:07,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:46:07,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:46:07,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:46:07,031 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:46:07,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:46:07,032 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:46:07,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:46:07,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:46:07,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:46:07,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:46:07,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:46:07,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:46:07,378 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:46:07,379 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-09 14:46:07,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d554da36f/7a2b7b77f59544f0b94ed23e380ecfdf/FLAG5c145db49 [2020-10-09 14:46:07,975 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:46:07,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-09 14:46:07,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d554da36f/7a2b7b77f59544f0b94ed23e380ecfdf/FLAG5c145db49 [2020-10-09 14:46:08,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d554da36f/7a2b7b77f59544f0b94ed23e380ecfdf [2020-10-09 14:46:08,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:46:08,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:46:08,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:46:08,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:46:08,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:46:08,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:46:08" (1/1) ... [2020-10-09 14:46:08,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c73ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:08, skipping insertion in model container [2020-10-09 14:46:08,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:46:08" (1/1) ... [2020-10-09 14:46:08,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:46:08,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:46:08,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:46:08,938 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:46:08,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:46:09,086 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:46:09,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09 WrapperNode [2020-10-09 14:46:09,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:46:09,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:46:09,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:46:09,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:46:09,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:46:09,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:46:09,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:46:09,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:46:09,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (1/1) ... [2020-10-09 14:46:09,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:46:09,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:46:09,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:46:09,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:46:09,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (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 [2020-10-09 14:46:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 14:46:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 14:46:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 14:46:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 14:46:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:46:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:46:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:46:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:46:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:46:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:46:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:46:09,259 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:46:09,562 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:46:09,562 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:46:09,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:46:09 BoogieIcfgContainer [2020-10-09 14:46:09,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:46:09,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:46:09,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:46:09,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:46:09,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:46:08" (1/3) ... [2020-10-09 14:46:09,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ac121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:46:09, skipping insertion in model container [2020-10-09 14:46:09,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:46:09" (2/3) ... [2020-10-09 14:46:09,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ac121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:46:09, skipping insertion in model container [2020-10-09 14:46:09,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:46:09" (3/3) ... [2020-10-09 14:46:09,578 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-09 14:46:09,595 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:46:09,606 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:46:09,608 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:46:09,646 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,647 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,647 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,647 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,649 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,650 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,650 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,650 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,651 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,651 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,651 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,653 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,653 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,653 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,653 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,654 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:09,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:46:09,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:46:09,764 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:46:09,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:46:09,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:46:09,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:46:09,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:46:09,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:46:09,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:46:09,780 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 14:46:09,819 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-09 14:46:09,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:46:09,824 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-09 14:46:09,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 14:46:09,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-09 14:46:09,850 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2020-10-09 14:46:09,850 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:46:09,850 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:09,851 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:09,852 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash 305903693, now seen corresponding path program 1 times [2020-10-09 14:46:09,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:09,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542268011] [2020-10-09 14:46:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:46:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:10,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:10,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:10,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:10,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:10,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542268011] [2020-10-09 14:46:10,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:10,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-09 14:46:10,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911680992] [2020-10-09 14:46:10,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 14:46:10,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 14:46:10,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 14:46:10,400 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:10,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 112 flow. Second operand 9 states. [2020-10-09 14:46:10,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:10,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:10,405 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:10,796 INFO L129 PetriNetUnfolder]: 73/340 cut-off events. [2020-10-09 14:46:10,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:46:10,800 INFO L80 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 340 events. 73/340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1887 event pairs, 0 based on Foata normal form. 78/390 useless extension candidates. Maximal degree in co-relation 444. Up to 45 conditions per place. [2020-10-09 14:46:10,804 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 17 selfloop transitions, 16 changer transitions 18/92 dead transitions. [2020-10-09 14:46:10,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 292 flow [2020-10-09 14:46:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 14:46:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 14:46:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 775 transitions. [2020-10-09 14:46:10,829 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8806818181818182 [2020-10-09 14:46:10,830 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 775 transitions. [2020-10-09 14:46:10,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 775 transitions. [2020-10-09 14:46:10,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:10,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 775 transitions. [2020-10-09 14:46:10,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 14:46:10,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 14:46:10,859 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 14:46:10,861 INFO L185 Difference]: Start difference. First operand has 55 places, 53 transitions, 112 flow. Second operand 16 states and 775 transitions. [2020-10-09 14:46:10,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 292 flow [2020-10-09 14:46:10,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:46:10,876 INFO L241 Difference]: Finished difference. Result has 82 places, 67 transitions, 250 flow [2020-10-09 14:46:10,879 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=250, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2020-10-09 14:46:10,881 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2020-10-09 14:46:10,881 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 250 flow [2020-10-09 14:46:10,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 14:46:10,882 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:10,882 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:46:11,100 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1723906183, now seen corresponding path program 1 times [2020-10-09 14:46:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:11,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525969895] [2020-10-09 14:46:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:11,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 14:46:11,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:11,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:11,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:11,292 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:11,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525969895] [2020-10-09 14:46:11,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:11,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2020-10-09 14:46:11,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25706996] [2020-10-09 14:46:11,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 14:46:11,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 14:46:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-09 14:46:11,612 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:11,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 250 flow. Second operand 11 states. [2020-10-09 14:46:11,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:11,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:11,613 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:12,083 INFO L129 PetriNetUnfolder]: 96/452 cut-off events. [2020-10-09 14:46:12,083 INFO L130 PetriNetUnfolder]: For 1731/1846 co-relation queries the response was YES. [2020-10-09 14:46:12,088 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 452 events. 96/452 cut-off events. For 1731/1846 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2535 event pairs, 1 based on Foata normal form. 25/434 useless extension candidates. Maximal degree in co-relation 1171. Up to 68 conditions per place. [2020-10-09 14:46:12,092 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 31 selfloop transitions, 42 changer transitions 43/150 dead transitions. [2020-10-09 14:46:12,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1174 flow [2020-10-09 14:46:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 14:46:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-09 14:46:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1062 transitions. [2020-10-09 14:46:12,099 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8395256916996048 [2020-10-09 14:46:12,099 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1062 transitions. [2020-10-09 14:46:12,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1062 transitions. [2020-10-09 14:46:12,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:12,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1062 transitions. [2020-10-09 14:46:12,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-09 14:46:12,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-09 14:46:12,108 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-09 14:46:12,109 INFO L185 Difference]: Start difference. First operand has 82 places, 67 transitions, 250 flow. Second operand 23 states and 1062 transitions. [2020-10-09 14:46:12,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1174 flow [2020-10-09 14:46:12,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 1098 flow, removed 37 selfloop flow, removed 5 redundant places. [2020-10-09 14:46:12,127 INFO L241 Difference]: Finished difference. Result has 113 places, 92 transitions, 713 flow [2020-10-09 14:46:12,127 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=713, PETRI_PLACES=113, PETRI_TRANSITIONS=92} [2020-10-09 14:46:12,128 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2020-10-09 14:46:12,129 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 92 transitions, 713 flow [2020-10-09 14:46:12,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 14:46:12,129 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:12,130 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:12,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:46:12,344 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1269320736, now seen corresponding path program 1 times [2020-10-09 14:46:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:12,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691521391] [2020-10-09 14:46:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:46:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:12,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:12,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:12,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:12,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:12,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691521391] [2020-10-09 14:46:12,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588407821] [2020-10-09 14:46:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:46:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:12,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:12,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:12,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:12,832 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:12,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764630951] [2020-10-09 14:46:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-09 14:46:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:46:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:12,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:12,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:12,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:12,939 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:12,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:46:12,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2020-10-09 14:46:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585943337] [2020-10-09 14:46:12,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:46:12,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:46:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:46:13,121 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:13,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 92 transitions, 713 flow. Second operand 13 states. [2020-10-09 14:46:13,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:13,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:13,122 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:13,885 INFO L129 PetriNetUnfolder]: 98/500 cut-off events. [2020-10-09 14:46:13,885 INFO L130 PetriNetUnfolder]: For 4940/5111 co-relation queries the response was YES. [2020-10-09 14:46:13,890 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 500 events. 98/500 cut-off events. For 4940/5111 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2760 event pairs, 2 based on Foata normal form. 42/490 useless extension candidates. Maximal degree in co-relation 1732. Up to 78 conditions per place. [2020-10-09 14:46:13,894 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 44 selfloop transitions, 56 changer transitions 25/159 dead transitions. [2020-10-09 14:46:13,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 159 transitions, 2058 flow [2020-10-09 14:46:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 14:46:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-09 14:46:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1192 transitions. [2020-10-09 14:46:13,899 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8335664335664336 [2020-10-09 14:46:13,900 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1192 transitions. [2020-10-09 14:46:13,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1192 transitions. [2020-10-09 14:46:13,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:13,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1192 transitions. [2020-10-09 14:46:13,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-09 14:46:13,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-09 14:46:13,909 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-09 14:46:13,909 INFO L185 Difference]: Start difference. First operand has 113 places, 92 transitions, 713 flow. Second operand 26 states and 1192 transitions. [2020-10-09 14:46:13,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 159 transitions, 2058 flow [2020-10-09 14:46:13,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1606 flow, removed 211 selfloop flow, removed 11 redundant places. [2020-10-09 14:46:13,937 INFO L241 Difference]: Finished difference. Result has 127 places, 114 transitions, 1030 flow [2020-10-09 14:46:13,938 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1030, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2020-10-09 14:46:13,938 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2020-10-09 14:46:13,938 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 1030 flow [2020-10-09 14:46:13,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:46:13,938 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:13,939 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:14,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:46:14,555 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1653313534, now seen corresponding path program 1 times [2020-10-09 14:46:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:14,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298982137] [2020-10-09 14:46:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:14,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:46:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:14,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:14,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:14,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:14,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:14,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298982137] [2020-10-09 14:46:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [282574505] [2020-10-09 14:46:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:46:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:14,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:14,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:14,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:14,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634767436] [2020-10-09 14:46:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-09 14:46:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:46:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:14,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:15,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:15,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:15,008 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:15,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:46:15,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 15 [2020-10-09 14:46:15,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342394252] [2020-10-09 14:46:15,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 14:46:15,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:15,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 14:46:15,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 14:46:15,170 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:15,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 1030 flow. Second operand 15 states. [2020-10-09 14:46:15,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:15,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:15,172 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:16,017 INFO L129 PetriNetUnfolder]: 111/618 cut-off events. [2020-10-09 14:46:16,017 INFO L130 PetriNetUnfolder]: For 8357/8454 co-relation queries the response was YES. [2020-10-09 14:46:16,023 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 618 events. 111/618 cut-off events. For 8357/8454 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3476 event pairs, 0 based on Foata normal form. 50/607 useless extension candidates. Maximal degree in co-relation 2323. Up to 78 conditions per place. [2020-10-09 14:46:16,031 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 36 selfloop transitions, 86 changer transitions 26/182 dead transitions. [2020-10-09 14:46:16,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 2905 flow [2020-10-09 14:46:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 14:46:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-09 14:46:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1421 transitions. [2020-10-09 14:46:16,038 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8334310850439882 [2020-10-09 14:46:16,038 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1421 transitions. [2020-10-09 14:46:16,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1421 transitions. [2020-10-09 14:46:16,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:16,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1421 transitions. [2020-10-09 14:46:16,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-09 14:46:16,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-09 14:46:16,049 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-09 14:46:16,049 INFO L185 Difference]: Start difference. First operand has 127 places, 114 transitions, 1030 flow. Second operand 31 states and 1421 transitions. [2020-10-09 14:46:16,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 182 transitions, 2905 flow [2020-10-09 14:46:16,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 182 transitions, 2478 flow, removed 205 selfloop flow, removed 10 redundant places. [2020-10-09 14:46:16,087 INFO L241 Difference]: Finished difference. Result has 157 places, 142 transitions, 1593 flow [2020-10-09 14:46:16,088 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1593, PETRI_PLACES=157, PETRI_TRANSITIONS=142} [2020-10-09 14:46:16,088 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2020-10-09 14:46:16,088 INFO L481 AbstractCegarLoop]: Abstraction has has 157 places, 142 transitions, 1593 flow [2020-10-09 14:46:16,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 14:46:16,088 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:16,089 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:16,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:16,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1286568708, now seen corresponding path program 2 times [2020-10-09 14:46:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:16,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380820527] [2020-10-09 14:46:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:16,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:46:16,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:46:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:16,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380820527] [2020-10-09 14:46:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157949500] [2020-10-09 14:46:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:17,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:46:17,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:46:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:17,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:17,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:17,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:17,264 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:17,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582268773] [2020-10-09 14:46:17,296 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 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 [2020-10-09 14:46:17,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:46:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:17,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:46:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:17,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:17,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:17,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:17,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:17,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:46:17,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2020-10-09 14:46:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336841663] [2020-10-09 14:46:17,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 14:46:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 14:46:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-09 14:46:17,517 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:17,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 142 transitions, 1593 flow. Second operand 24 states. [2020-10-09 14:46:17,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:17,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:17,519 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:18,597 INFO L129 PetriNetUnfolder]: 127/708 cut-off events. [2020-10-09 14:46:18,598 INFO L130 PetriNetUnfolder]: For 12664/12778 co-relation queries the response was YES. [2020-10-09 14:46:18,606 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2976 conditions, 708 events. 127/708 cut-off events. For 12664/12778 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3954 event pairs, 0 based on Foata normal form. 45/683 useless extension candidates. Maximal degree in co-relation 2901. Up to 89 conditions per place. [2020-10-09 14:46:18,613 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 52 selfloop transitions, 110 changer transitions 17/213 dead transitions. [2020-10-09 14:46:18,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 213 transitions, 3765 flow [2020-10-09 14:46:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 14:46:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-09 14:46:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1601 transitions. [2020-10-09 14:46:18,620 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8316883116883117 [2020-10-09 14:46:18,620 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1601 transitions. [2020-10-09 14:46:18,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1601 transitions. [2020-10-09 14:46:18,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:18,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1601 transitions. [2020-10-09 14:46:18,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-09 14:46:18,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-09 14:46:18,631 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-09 14:46:18,631 INFO L185 Difference]: Start difference. First operand has 157 places, 142 transitions, 1593 flow. Second operand 35 states and 1601 transitions. [2020-10-09 14:46:18,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 213 transitions, 3765 flow [2020-10-09 14:46:18,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 213 transitions, 2917 flow, removed 374 selfloop flow, removed 21 redundant places. [2020-10-09 14:46:18,676 INFO L241 Difference]: Finished difference. Result has 175 places, 170 transitions, 1863 flow [2020-10-09 14:46:18,676 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1863, PETRI_PLACES=175, PETRI_TRANSITIONS=170} [2020-10-09 14:46:18,677 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2020-10-09 14:46:18,677 INFO L481 AbstractCegarLoop]: Abstraction has has 175 places, 170 transitions, 1863 flow [2020-10-09 14:46:18,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 14:46:18,677 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:18,677 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:19,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:19,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1095061395, now seen corresponding path program 3 times [2020-10-09 14:46:19,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:19,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520249232] [2020-10-09 14:46:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:19,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 14:46:19,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:19,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:19,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:19,532 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,547 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,561 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,587 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,599 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,608 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,618 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,627 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520249232] [2020-10-09 14:46:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661795167] [2020-10-09 14:46:19,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:19,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 14:46:19,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:19,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:19,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:19,844 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,859 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,875 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,890 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,926 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,937 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:19,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441561233] [2020-10-09 14:46:19,985 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 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 [2020-10-09 14:46:20,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 14:46:20,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:20,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:20,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:20,073 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,094 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,109 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,126 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,136 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,146 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,165 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,172 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:20,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:46:20,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 15 [2020-10-09 14:46:20,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909962279] [2020-10-09 14:46:20,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 14:46:20,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:20,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 14:46:20,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 14:46:20,443 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:20,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 170 transitions, 1863 flow. Second operand 15 states. [2020-10-09 14:46:20,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:20,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:20,444 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:20,915 INFO L129 PetriNetUnfolder]: 137/829 cut-off events. [2020-10-09 14:46:20,915 INFO L130 PetriNetUnfolder]: For 15020/15107 co-relation queries the response was YES. [2020-10-09 14:46:20,925 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 829 events. 137/829 cut-off events. For 15020/15107 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5087 event pairs, 0 based on Foata normal form. 24/763 useless extension candidates. Maximal degree in co-relation 3127. Up to 163 conditions per place. [2020-10-09 14:46:20,934 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 126 selfloop transitions, 43 changer transitions 8/211 dead transitions. [2020-10-09 14:46:20,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 211 transitions, 3208 flow [2020-10-09 14:46:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 14:46:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-09 14:46:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 866 transitions. [2020-10-09 14:46:20,938 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8287081339712918 [2020-10-09 14:46:20,938 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 866 transitions. [2020-10-09 14:46:20,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 866 transitions. [2020-10-09 14:46:20,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:20,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 866 transitions. [2020-10-09 14:46:20,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-09 14:46:20,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-09 14:46:20,943 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-09 14:46:20,943 INFO L185 Difference]: Start difference. First operand has 175 places, 170 transitions, 1863 flow. Second operand 19 states and 866 transitions. [2020-10-09 14:46:20,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 211 transitions, 3208 flow [2020-10-09 14:46:20,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 211 transitions, 2665 flow, removed 238 selfloop flow, removed 18 redundant places. [2020-10-09 14:46:20,999 INFO L241 Difference]: Finished difference. Result has 180 places, 186 transitions, 1830 flow [2020-10-09 14:46:21,000 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1830, PETRI_PLACES=180, PETRI_TRANSITIONS=186} [2020-10-09 14:46:21,000 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2020-10-09 14:46:21,001 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 186 transitions, 1830 flow [2020-10-09 14:46:21,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 14:46:21,001 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:21,001 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:21,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3,14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:46:21,615 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1586782921, now seen corresponding path program 4 times [2020-10-09 14:46:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:21,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072345828] [2020-10-09 14:46:21,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:21,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:46:21,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:21,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:21,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:21,831 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,845 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,857 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,876 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,912 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:21,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072345828] [2020-10-09 14:46:21,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867096977] [2020-10-09 14:46:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:22,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:46:22,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:22,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:22,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:22,131 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,146 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,160 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,184 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,194 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,201 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403950975] [2020-10-09 14:46:22,232 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:46:22,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:46:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 14:46:22,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:22,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:22,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:22,306 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,318 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,340 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,378 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:22,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:46:22,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 15 [2020-10-09 14:46:22,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241329217] [2020-10-09 14:46:22,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 14:46:22,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 14:46:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-09 14:46:22,847 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:22,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 186 transitions, 1830 flow. Second operand 15 states. [2020-10-09 14:46:22,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:22,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:22,849 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:23,397 INFO L129 PetriNetUnfolder]: 149/902 cut-off events. [2020-10-09 14:46:23,398 INFO L130 PetriNetUnfolder]: For 15912/16028 co-relation queries the response was YES. [2020-10-09 14:46:23,411 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 902 events. 149/902 cut-off events. For 15912/16028 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5740 event pairs, 0 based on Foata normal form. 32/837 useless extension candidates. Maximal degree in co-relation 3306. Up to 119 conditions per place. [2020-10-09 14:46:23,424 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 100 selfloop transitions, 80 changer transitions 8/222 dead transitions. [2020-10-09 14:46:23,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 222 transitions, 3144 flow [2020-10-09 14:46:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 14:46:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-09 14:46:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1001 transitions. [2020-10-09 14:46:23,429 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8272727272727273 [2020-10-09 14:46:23,429 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1001 transitions. [2020-10-09 14:46:23,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1001 transitions. [2020-10-09 14:46:23,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:23,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1001 transitions. [2020-10-09 14:46:23,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-09 14:46:23,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-09 14:46:23,437 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-09 14:46:23,437 INFO L185 Difference]: Start difference. First operand has 180 places, 186 transitions, 1830 flow. Second operand 22 states and 1001 transitions. [2020-10-09 14:46:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 222 transitions, 3144 flow [2020-10-09 14:46:23,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 222 transitions, 2990 flow, removed 50 selfloop flow, removed 10 redundant places. [2020-10-09 14:46:23,522 INFO L241 Difference]: Finished difference. Result has 197 places, 198 transitions, 2143 flow [2020-10-09 14:46:23,523 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2143, PETRI_PLACES=197, PETRI_TRANSITIONS=198} [2020-10-09 14:46:23,523 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2020-10-09 14:46:23,523 INFO L481 AbstractCegarLoop]: Abstraction has has 197 places, 198 transitions, 2143 flow [2020-10-09 14:46:23,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 14:46:23,524 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:23,524 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:24,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:24,139 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1602880599, now seen corresponding path program 5 times [2020-10-09 14:46:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:24,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082549310] [2020-10-09 14:46:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:24,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 14:46:24,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:24,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:24,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:24,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:24,365 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082549310] [2020-10-09 14:46:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930591998] [2020-10-09 14:46:24,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:24,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 14:46:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:24,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:24,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:24,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:24,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:24,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:24,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:24,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133719397] [2020-10-09 14:46:24,672 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:46:24,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 14:46:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:46:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:24,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:46:24,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:46:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:24,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:24,756 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:46:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:24,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:46:24,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 16 [2020-10-09 14:46:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870234516] [2020-10-09 14:46:24,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 14:46:24,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 14:46:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-09 14:46:25,089 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:46:25,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 198 transitions, 2143 flow. Second operand 16 states. [2020-10-09 14:46:25,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:25,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:46:25,090 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:25,917 INFO L129 PetriNetUnfolder]: 157/958 cut-off events. [2020-10-09 14:46:25,917 INFO L130 PetriNetUnfolder]: For 19218/19318 co-relation queries the response was YES. [2020-10-09 14:46:25,929 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 958 events. 157/958 cut-off events. For 19218/19318 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6120 event pairs, 0 based on Foata normal form. 43/903 useless extension candidates. Maximal degree in co-relation 3684. Up to 120 conditions per place. [2020-10-09 14:46:25,937 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 52 selfloop transitions, 137 changer transitions 8/231 dead transitions. [2020-10-09 14:46:25,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 231 transitions, 3628 flow [2020-10-09 14:46:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 14:46:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-09 14:46:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1323 transitions. [2020-10-09 14:46:25,941 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8294670846394985 [2020-10-09 14:46:25,941 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1323 transitions. [2020-10-09 14:46:25,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1323 transitions. [2020-10-09 14:46:25,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:25,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1323 transitions. [2020-10-09 14:46:25,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-09 14:46:25,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-09 14:46:25,947 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-09 14:46:25,948 INFO L185 Difference]: Start difference. First operand has 197 places, 198 transitions, 2143 flow. Second operand 29 states and 1323 transitions. [2020-10-09 14:46:25,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 231 transitions, 3628 flow [2020-10-09 14:46:26,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 231 transitions, 3324 flow, removed 96 selfloop flow, removed 15 redundant places. [2020-10-09 14:46:26,023 INFO L241 Difference]: Finished difference. Result has 215 places, 206 transitions, 2439 flow [2020-10-09 14:46:26,024 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2439, PETRI_PLACES=215, PETRI_TRANSITIONS=206} [2020-10-09 14:46:26,024 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2020-10-09 14:46:26,024 INFO L481 AbstractCegarLoop]: Abstraction has has 215 places, 206 transitions, 2439 flow [2020-10-09 14:46:26,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 14:46:26,024 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:26,024 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:26,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:46:26,638 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 373925221, now seen corresponding path program 6 times [2020-10-09 14:46:26,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:26,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426889223] [2020-10-09 14:46:26,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:26,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-09 14:46:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 14:46:26,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 14:46:26,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 14:46:26,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426889223] [2020-10-09 14:46:26,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:26,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 13 [2020-10-09 14:46:26,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741662358] [2020-10-09 14:46:26,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:46:26,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:26,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:46:26,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:46:26,995 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-09 14:46:26,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 206 transitions, 2439 flow. Second operand 13 states. [2020-10-09 14:46:26,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:26,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-09 14:46:26,996 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:27,553 INFO L129 PetriNetUnfolder]: 321/2018 cut-off events. [2020-10-09 14:46:27,553 INFO L130 PetriNetUnfolder]: For 18674/18697 co-relation queries the response was YES. [2020-10-09 14:46:27,589 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6110 conditions, 2018 events. 321/2018 cut-off events. For 18674/18697 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 18077 event pairs, 21 based on Foata normal form. 17/1839 useless extension candidates. Maximal degree in co-relation 6040. Up to 283 conditions per place. [2020-10-09 14:46:27,593 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 0 selfloop transitions, 0 changer transitions 211/211 dead transitions. [2020-10-09 14:46:27,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 211 transitions, 2246 flow [2020-10-09 14:46:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 14:46:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-09 14:46:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 839 transitions. [2020-10-09 14:46:27,596 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8474747474747475 [2020-10-09 14:46:27,596 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 839 transitions. [2020-10-09 14:46:27,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 839 transitions. [2020-10-09 14:46:27,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:27,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 839 transitions. [2020-10-09 14:46:27,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-09 14:46:27,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-09 14:46:27,600 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-09 14:46:27,600 INFO L185 Difference]: Start difference. First operand has 215 places, 206 transitions, 2439 flow. Second operand 18 states and 839 transitions. [2020-10-09 14:46:27,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 211 transitions, 2246 flow [2020-10-09 14:46:27,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 211 transitions, 1824 flow, removed 19 selfloop flow, removed 39 redundant places. [2020-10-09 14:46:27,665 INFO L241 Difference]: Finished difference. Result has 187 places, 0 transitions, 0 flow [2020-10-09 14:46:27,665 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=187, PETRI_TRANSITIONS=0} [2020-10-09 14:46:27,666 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2020-10-09 14:46:27,666 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 0 transitions, 0 flow [2020-10-09 14:46:27,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:46:27,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-10-09 14:46:27,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:46:27 BasicIcfg [2020-10-09 14:46:27,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:46:27,889 INFO L168 Benchmark]: Toolchain (without parser) took 19618.52 ms. Allocated memory was 248.5 MB in the beginning and 565.2 MB in the end (delta: 316.7 MB). Free memory was 203.5 MB in the beginning and 293.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 226.8 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:27,890 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 248.5 MB. Free memory is still 224.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:46:27,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 816.27 ms. Allocated memory was 248.5 MB in the beginning and 305.7 MB in the end (delta: 57.1 MB). Free memory was 203.5 MB in the beginning and 260.9 MB in the end (delta: -57.5 MB). Peak memory consumption was 30.2 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:27,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.69 ms. Allocated memory is still 305.7 MB. Free memory is still 260.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:46:27,892 INFO L168 Benchmark]: Boogie Preprocessor took 32.31 ms. Allocated memory is still 305.7 MB. Free memory was 260.9 MB in the beginning and 258.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:27,894 INFO L168 Benchmark]: RCFGBuilder took 393.92 ms. Allocated memory is still 305.7 MB. Free memory was 258.4 MB in the beginning and 236.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:27,895 INFO L168 Benchmark]: TraceAbstraction took 18317.23 ms. Allocated memory was 305.7 MB in the beginning and 565.2 MB in the end (delta: 259.5 MB). Free memory was 236.6 MB in the beginning and 293.3 MB in the end (delta: -56.7 MB). Peak memory consumption was 202.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:27,902 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 248.5 MB. Free memory is still 224.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 816.27 ms. Allocated memory was 248.5 MB in the beginning and 305.7 MB in the end (delta: 57.1 MB). Free memory was 203.5 MB in the beginning and 260.9 MB in the end (delta: -57.5 MB). Peak memory consumption was 30.2 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 52.69 ms. Allocated memory is still 305.7 MB. Free memory is still 260.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 32.31 ms. Allocated memory is still 305.7 MB. Free memory was 260.9 MB in the beginning and 258.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 393.92 ms. Allocated memory is still 305.7 MB. Free memory was 258.4 MB in the beginning and 236.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 18317.23 ms. Allocated memory was 305.7 MB in the beginning and 565.2 MB in the end (delta: 259.5 MB). Free memory was 236.6 MB in the beginning and 293.3 MB in the end (delta: -56.7 MB). Peak memory consumption was 202.9 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 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: 18.1s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 421 SDslu, 258 SDs, 0 SdLazy, 1520 SolverSat, 432 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2442 GetRequests, 2059 SyntacticMatches, 110 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2439occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1162 NumberOfCodeBlocks, 1160 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2282 ConstructedInterpolants, 0 QuantifiedInterpolants, 537926 SizeOfPredicates, 210 NumberOfNonLiveVariables, 2564 ConjunctsInSsa, 273 ConjunctsInUnsatCore, 42 InterpolantComputations, 6 PerfectInterpolantSequences, 196/1852 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...