/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:30:30,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:30:30,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:30:30,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:30:30,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:30:30,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:30:30,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:30:30,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:30:30,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:30:30,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:30:30,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:30:30,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:30:30,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:30:30,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:30:30,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:30:30,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:30:30,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:30:30,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:30:30,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:30:30,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:30:30,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:30:30,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:30:30,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:30:30,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:30:30,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:30:30,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:30:30,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:30:30,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:30:30,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2021-03-24 13:30:30,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:30:30,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:30:30,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:30:30,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:30:30,281 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:30:30,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:30:30,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:30:30,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:30:30,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:30:30,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:30:30,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:30:30,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:30:30,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:30:30,283 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:30:30,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:30:30,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:30:30,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:30:30,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:30:30,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:30:30,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:30:30,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:30:30,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:30:30,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:30:30,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:30:30,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:30:30,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:30:30,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:30:30,285 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:30:30,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:30:30,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:30:30,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:30:30,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:30:30,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:30:30,616 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:30:30,617 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:30:30,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl [2021-03-24 13:30:30,618 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl' [2021-03-24 13:30:30,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:30:30,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:30:30,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:30:30,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:30:30,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:30:30,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:30:30,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:30:30,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:30:30,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:30:30,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... [2021-03-24 13:30:30,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:30:30,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:30:30,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:30:30,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:30:30,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:30:30,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:30:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:30:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:30:30,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure IncrementProcess1 given in one single declaration [2021-03-24 13:30:30,789 INFO L130 BoogieDeclarations]: Found specification of procedure IncrementProcess1 [2021-03-24 13:30:30,789 INFO L138 BoogieDeclarations]: Found implementation of procedure IncrementProcess1 [2021-03-24 13:30:30,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure IncrementProcess2 given in one single declaration [2021-03-24 13:30:30,789 INFO L130 BoogieDeclarations]: Found specification of procedure IncrementProcess2 [2021-03-24 13:30:30,789 INFO L138 BoogieDeclarations]: Found implementation of procedure IncrementProcess2 [2021-03-24 13:30:30,790 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:30:30,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:30:30,936 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 13:30:30,937 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:30:30 BoogieIcfgContainer [2021-03-24 13:30:30,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:30:30,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:30:30,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:30:30,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:30:30,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:30" (1/2) ... [2021-03-24 13:30:30,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145b3ab7 and model type NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:30:30, skipping insertion in model container [2021-03-24 13:30:30,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:30:30" (2/2) ... [2021-03-24 13:30:30,943 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.bpl [2021-03-24 13:30:30,948 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:30:30,950 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:30:30,951 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:30:30,983 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,983 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,984 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,984 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,984 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,984 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,985 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,985 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,985 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,985 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,985 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,986 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,986 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,986 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,986 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,987 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,987 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,987 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,987 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,987 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,988 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,988 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,988 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,995 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:30,997 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:31,001 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:30:31,011 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-24 13:30:31,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 13:30:31,053 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:30:31,053 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:30:31,053 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:30:31,054 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:30:31,054 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:30:31,054 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:30:31,054 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:30:31,054 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:30:31,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 74 flow [2021-03-24 13:30:31,088 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-03-24 13:30:31,088 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:30:31,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 24 events. 1/24 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2021-03-24 13:30:31,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 74 flow [2021-03-24 13:30:31,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 22 transitions, 62 flow [2021-03-24 13:30:31,101 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:30:31,111 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 22 transitions, 62 flow [2021-03-24 13:30:31,116 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 22 transitions, 62 flow [2021-03-24 13:30:31,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 62 flow [2021-03-24 13:30:31,139 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-03-24 13:30:31,139 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:30:31,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 22 events. 1/22 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2021-03-24 13:30:31,141 INFO L142 LiptonReduction]: Number of co-enabled transitions 140 [2021-03-24 13:30:31,173 INFO L154 LiptonReduction]: Checked pairs total: 354 [2021-03-24 13:30:31,174 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 13:30:31,175 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 75 [2021-03-24 13:30:31,185 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-03-24 13:30:31,185 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:30:31,185 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:31,185 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:31,186 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1717627251, now seen corresponding path program 1 times [2021-03-24 13:30:31,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:31,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494527690] [2021-03-24 13:30:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:31,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,367 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:31,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:31,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494527690] [2021-03-24 13:30:31,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:31,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-03-24 13:30:31,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306171893] [2021-03-24 13:30:31,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-24 13:30:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-24 13:30:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-24 13:30:31,530 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 13:30:31,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 58 flow. Second operand has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:31,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:31,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 13:30:31,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:31,993 INFO L129 PetriNetUnfolder]: 79/236 cut-off events. [2021-03-24 13:30:31,993 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-03-24 13:30:31,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 236 events. 79/236 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1080 event pairs, 25 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 428. Up to 81 conditions per place. [2021-03-24 13:30:31,997 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 41 selfloop transitions, 27 changer transitions 14/86 dead transitions. [2021-03-24 13:30:31,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 86 transitions, 357 flow [2021-03-24 13:30:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-24 13:30:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-03-24 13:30:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 248 transitions. [2021-03-24 13:30:32,008 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2021-03-24 13:30:32,009 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 248 transitions. [2021-03-24 13:30:32,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 248 transitions. [2021-03-24 13:30:32,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:32,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 248 transitions. [2021-03-24 13:30:32,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 13.777777777777779) internal successors, (248), 18 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,022 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,023 INFO L185 Difference]: Start difference. First operand has 25 places, 20 transitions, 58 flow. Second operand 18 states and 248 transitions. [2021-03-24 13:30:32,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 86 transitions, 357 flow [2021-03-24 13:30:32,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 86 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 13:30:32,039 INFO L241 Difference]: Finished difference. Result has 50 places, 48 transitions, 240 flow [2021-03-24 13:30:32,040 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=240, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2021-03-24 13:30:32,041 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2021-03-24 13:30:32,041 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 240 flow [2021-03-24 13:30:32,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,042 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:32,042 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:32,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:30:32,042 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash 515928769, now seen corresponding path program 2 times [2021-03-24 13:30:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:32,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373060244] [2021-03-24 13:30:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:32,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:32,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373060244] [2021-03-24 13:30:32,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:32,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-03-24 13:30:32,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044049125] [2021-03-24 13:30:32,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-24 13:30:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-24 13:30:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-24 13:30:32,169 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 13:30:32,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 240 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:32,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 13:30:32,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:32,527 INFO L129 PetriNetUnfolder]: 142/452 cut-off events. [2021-03-24 13:30:32,527 INFO L130 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2021-03-24 13:30:32,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 452 events. 142/452 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2823 event pairs, 12 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 1648. Up to 138 conditions per place. [2021-03-24 13:30:32,532 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 75 selfloop transitions, 47 changer transitions 3/129 dead transitions. [2021-03-24 13:30:32,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 129 transitions, 1049 flow [2021-03-24 13:30:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-24 13:30:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-03-24 13:30:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 217 transitions. [2021-03-24 13:30:32,535 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2021-03-24 13:30:32,535 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 217 transitions. [2021-03-24 13:30:32,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 217 transitions. [2021-03-24 13:30:32,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:32,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 217 transitions. [2021-03-24 13:30:32,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,538 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,538 INFO L185 Difference]: Start difference. First operand has 50 places, 48 transitions, 240 flow. Second operand 14 states and 217 transitions. [2021-03-24 13:30:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 129 transitions, 1049 flow [2021-03-24 13:30:32,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 129 transitions, 891 flow, removed 79 selfloop flow, removed 6 redundant places. [2021-03-24 13:30:32,550 INFO L241 Difference]: Finished difference. Result has 59 places, 91 transitions, 664 flow [2021-03-24 13:30:32,550 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=664, PETRI_PLACES=59, PETRI_TRANSITIONS=91} [2021-03-24 13:30:32,551 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2021-03-24 13:30:32,551 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 91 transitions, 664 flow [2021-03-24 13:30:32,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,551 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:32,552 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:32,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:30:32,552 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1260868631, now seen corresponding path program 3 times [2021-03-24 13:30:32,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:32,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336378798] [2021-03-24 13:30:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:32,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,583 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:32,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336378798] [2021-03-24 13:30:32,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:32,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:30:32,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248316615] [2021-03-24 13:30:32,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:30:32,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:30:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:30:32,621 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 28 [2021-03-24 13:30:32,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 91 transitions, 664 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:32,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 28 [2021-03-24 13:30:32,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:32,837 INFO L129 PetriNetUnfolder]: 161/554 cut-off events. [2021-03-24 13:30:32,838 INFO L130 PetriNetUnfolder]: For 2298/2298 co-relation queries the response was YES. [2021-03-24 13:30:32,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 554 events. 161/554 cut-off events. For 2298/2298 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3927 event pairs, 13 based on Foata normal form. 4/558 useless extension candidates. Maximal degree in co-relation 2260. Up to 236 conditions per place. [2021-03-24 13:30:32,843 INFO L132 encePairwiseOnDemand]: 17/28 looper letters, 102 selfloop transitions, 53 changer transitions 35/195 dead transitions. [2021-03-24 13:30:32,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 1818 flow [2021-03-24 13:30:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-24 13:30:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-24 13:30:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2021-03-24 13:30:32,845 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2021-03-24 13:30:32,845 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 192 transitions. [2021-03-24 13:30:32,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 192 transitions. [2021-03-24 13:30:32,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:32,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 192 transitions. [2021-03-24 13:30:32,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 16.0) internal successors, (192), 12 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,847 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,847 INFO L185 Difference]: Start difference. First operand has 59 places, 91 transitions, 664 flow. Second operand 12 states and 192 transitions. [2021-03-24 13:30:32,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 1818 flow [2021-03-24 13:30:32,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 195 transitions, 1654 flow, removed 80 selfloop flow, removed 1 redundant places. [2021-03-24 13:30:32,865 INFO L241 Difference]: Finished difference. Result has 75 places, 118 transitions, 1006 flow [2021-03-24 13:30:32,866 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1006, PETRI_PLACES=75, PETRI_TRANSITIONS=118} [2021-03-24 13:30:32,866 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2021-03-24 13:30:32,866 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 118 transitions, 1006 flow [2021-03-24 13:30:32,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,866 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:32,866 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:32,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:30:32,867 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:32,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1198838527, now seen corresponding path program 4 times [2021-03-24 13:30:32,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:32,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385639970] [2021-03-24 13:30:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:32,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:32,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:32,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385639970] [2021-03-24 13:30:32,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:32,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:30:32,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348716896] [2021-03-24 13:30:32,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:30:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:32,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:30:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:30:32,923 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 13:30:32,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 118 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:32,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:32,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 13:30:32,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:33,167 INFO L129 PetriNetUnfolder]: 159/596 cut-off events. [2021-03-24 13:30:33,168 INFO L130 PetriNetUnfolder]: For 3053/3053 co-relation queries the response was YES. [2021-03-24 13:30:33,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 596 events. 159/596 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4406 event pairs, 23 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 2514. Up to 236 conditions per place. [2021-03-24 13:30:33,173 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 98 selfloop transitions, 55 changer transitions 22/179 dead transitions. [2021-03-24 13:30:33,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 179 transitions, 1796 flow [2021-03-24 13:30:33,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-24 13:30:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-03-24 13:30:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2021-03-24 13:30:33,174 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2021-03-24 13:30:33,175 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 173 transitions. [2021-03-24 13:30:33,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 173 transitions. [2021-03-24 13:30:33,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:33,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 173 transitions. [2021-03-24 13:30:33,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,176 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,176 INFO L185 Difference]: Start difference. First operand has 75 places, 118 transitions, 1006 flow. Second operand 11 states and 173 transitions. [2021-03-24 13:30:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 179 transitions, 1796 flow [2021-03-24 13:30:33,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 179 transitions, 1737 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-03-24 13:30:33,196 INFO L241 Difference]: Finished difference. Result has 87 places, 123 transitions, 1183 flow [2021-03-24 13:30:33,196 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1183, PETRI_PLACES=87, PETRI_TRANSITIONS=123} [2021-03-24 13:30:33,197 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 62 predicate places. [2021-03-24 13:30:33,197 INFO L480 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 1183 flow [2021-03-24 13:30:33,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,197 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:33,197 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:33,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 13:30:33,197 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:33,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1055672017, now seen corresponding path program 5 times [2021-03-24 13:30:33,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:33,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471214584] [2021-03-24 13:30:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:33,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,258 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:33,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:33,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471214584] [2021-03-24 13:30:33,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:33,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-03-24 13:30:33,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988190487] [2021-03-24 13:30:33,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-24 13:30:33,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-24 13:30:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-24 13:30:33,301 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 13:30:33,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 123 transitions, 1183 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:33,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 13:30:33,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:33,675 INFO L129 PetriNetUnfolder]: 145/549 cut-off events. [2021-03-24 13:30:33,676 INFO L130 PetriNetUnfolder]: For 2473/2473 co-relation queries the response was YES. [2021-03-24 13:30:33,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 549 events. 145/549 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3978 event pairs, 13 based on Foata normal form. 2/551 useless extension candidates. Maximal degree in co-relation 2327. Up to 129 conditions per place. [2021-03-24 13:30:33,680 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 80 selfloop transitions, 67 changer transitions 18/169 dead transitions. [2021-03-24 13:30:33,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 169 transitions, 1975 flow [2021-03-24 13:30:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-24 13:30:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-03-24 13:30:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 233 transitions. [2021-03-24 13:30:33,683 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5200892857142857 [2021-03-24 13:30:33,683 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 233 transitions. [2021-03-24 13:30:33,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 233 transitions. [2021-03-24 13:30:33,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:33,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 233 transitions. [2021-03-24 13:30:33,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 14.5625) internal successors, (233), 16 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,685 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,685 INFO L185 Difference]: Start difference. First operand has 87 places, 123 transitions, 1183 flow. Second operand 16 states and 233 transitions. [2021-03-24 13:30:33,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 169 transitions, 1975 flow [2021-03-24 13:30:33,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 169 transitions, 1884 flow, removed 16 selfloop flow, removed 7 redundant places. [2021-03-24 13:30:33,708 INFO L241 Difference]: Finished difference. Result has 97 places, 121 transitions, 1241 flow [2021-03-24 13:30:33,708 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1241, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2021-03-24 13:30:33,709 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2021-03-24 13:30:33,709 INFO L480 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1241 flow [2021-03-24 13:30:33,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:30:33,711 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:33,711 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:33,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 13:30:33,711 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1882554451, now seen corresponding path program 6 times [2021-03-24 13:30:33,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:33,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788347853] [2021-03-24 13:30:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:30:33,731 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:30:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:30:33,735 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:30:33,756 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:30:33,756 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:30:33,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 13:30:33,775 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:30:33 BasicIcfg [2021-03-24 13:30:33,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:30:33,805 INFO L168 Benchmark]: Toolchain (without parser) took 3097.87 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 237.0 MB in the beginning and 239.1 MB in the end (delta: -2.1 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:33,805 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:30:33,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.04 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:30:33,806 INFO L168 Benchmark]: Boogie Preprocessor took 13.30 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.5 MB in the end (delta: 849.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:30:33,806 INFO L168 Benchmark]: RCFGBuilder took 216.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 238.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:33,806 INFO L168 Benchmark]: TraceAbstraction took 2836.75 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 238.4 MB in the beginning and 239.1 MB in the end (delta: -712.5 kB). Peak memory consumption was 97.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:33,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.04 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.30 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.5 MB in the end (delta: 849.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 216.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 238.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2836.75 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 238.4 MB in the beginning and 239.1 MB in the end (delta: -712.5 kB). Peak memory consumption was 97.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 57.8ms, 27 PlacesBefore, 25 PlacesAfterwards, 22 TransitionsBefore, 20 TransitionsAfterwards, 140 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 70, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 29, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 29, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 70, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 29, unknown conditional: 0, unknown unconditional: 29] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - CounterExampleResult [Line: 28]: assertion can be violated assertion can be violated We found a FailurePath: [L22] 0 x := 0; VAL [x=0] [L24] FORK 0 fork 1 IncrementProcess1(); VAL [x=0] [L25] FORK 0 fork 2 IncrementProcess2(); VAL [x=0] [L54] 2 localx := x; VAL [localx=0, x=0] [L38] 1 localx := x; VAL [localx=0, localx=0, x=0] [L55] 2 x := localx + 1; VAL [localx=0, localx=0, x=1] [L57] 2 localx := x; VAL [localx=1, localx=0, x=1] [L58] 2 x := localx + 1; VAL [localx=1, localx=0, x=2] [L39] 1 x := localx + 1; VAL [localx=1, localx=0, x=1] [L41] 1 localx := x; VAL [localx=1, localx=1, x=1] [L60] 2 localx := x; VAL [localx=1, localx=1, x=1] [L42] 1 x := localx + 1; VAL [localx=1, localx=1, x=2] [L44] 1 localx := x; VAL [localx=1, localx=2, x=2] [L45] 1 x := localx + 1; [L61] 2 x := localx + 1; [L26] JOIN 1 join 1; VAL [localx=1, localx=2, x=2] [L27] JOIN 2 join 2; VAL [localx=1, localx=2, x=2] [L28] 0 assert x >= 3; VAL [localx=1, localx=2, x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2710.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1833.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 125.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 134 SDtfs, 167 SDslu, 153 SDs, 0 SdLazy, 1025 SolverSat, 246 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 584.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 720.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1241occurred in iteration=5, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.8ms SsaConstructionTime, 79.0ms SatisfiabilityAnalysisTime, 502.0ms InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 255 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...