/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:21:52,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:21:52,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:21:52,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 22:21:52,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 22:21:52,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 22:21:52,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 22:21:52,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-24 22:21:52,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:21:52,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:21:52,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:21:52,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:21:52,561 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:21:52,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:21:52,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:21:52,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:21:52,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:21:52,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:21:52,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:21:52,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:21:52,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:21:52,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:21:52,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:21:52,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:21:52,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:21:52,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:21:52,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:21:52,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:21:52,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:21:52,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:21:52,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:21:52,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:21:52,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:21:52,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:21:52,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:21:52,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:21:52,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:21:52,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:21:52,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:21:52,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:21:52,886 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:21:52,887 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:21:52,887 INFO L432 ainManager$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 22:21:52,888 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl' [2021-03-24 22:21:52,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:21:52,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:21:52,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:21:52,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:21:52,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:21:52,937 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,942 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:21:52,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:21:52,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:21:52,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:21:52,957 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,958 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,959 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,959 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,961 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,962 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,962 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 10:21:52" (1/1) ... [2021-03-24 22:21:52,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:21:52,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:21:52,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:21:52,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:21:52,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:52" (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 22:21:53,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:21:53,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:21:53,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:21:53,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure IncrementProcess1 given in one single declaration [2021-03-24 22:21:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure IncrementProcess1 [2021-03-24 22:21:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure IncrementProcess1 [2021-03-24 22:21:53,028 INFO L124 BoogieDeclarations]: Specification and implementation of procedure IncrementProcess2 given in one single declaration [2021-03-24 22:21:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure IncrementProcess2 [2021-03-24 22:21:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure IncrementProcess2 [2021-03-24 22:21:53,029 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 22:21:53,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:21:53,167 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:21:53,168 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:21:53 BoogieIcfgContainer [2021-03-24 22:21:53,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:21:53,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:21:53,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:21:53,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:21:53,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:21:52" (1/2) ... [2021-03-24 22:21:53,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c12fc70 and model type NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:21:53, skipping insertion in model container [2021-03-24 22:21:53,173 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 10:21:53" (2/2) ... [2021-03-24 22:21:53,174 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.bpl [2021-03-24 22:21:53,178 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:21:53,180 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:21:53,181 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:21:53,211 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,212 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,212 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,212 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,212 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,213 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,213 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,213 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,213 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,213 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,213 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,214 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,214 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,214 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,215 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,215 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,215 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,215 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,215 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,216 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,216 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,216 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,216 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,216 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,218 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,231 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:21:53,238 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-24 22:21:53,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 22:21:53,289 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:21:53,289 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:21:53,289 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:21:53,289 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:21:53,290 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:21:53,290 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:21:53,290 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:21:53,290 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:21:53,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 74 flow [2021-03-24 22:21:53,333 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-03-24 22:21:53,334 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 22:21:53,336 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 22:21:53,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 74 flow [2021-03-24 22:21:53,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 22 transitions, 62 flow [2021-03-24 22:21:53,345 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:21:53,357 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 22 transitions, 62 flow [2021-03-24 22:21:53,361 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 22 transitions, 62 flow [2021-03-24 22:21:53,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 62 flow [2021-03-24 22:21:53,381 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-03-24 22:21:53,381 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 22:21:53,381 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 22:21:53,383 INFO L142 LiptonReduction]: Number of co-enabled transitions 140 [2021-03-24 22:21:53,560 INFO L154 LiptonReduction]: Checked pairs total: 354 [2021-03-24 22:21:53,560 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 22:21:53,562 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 218 [2021-03-24 22:21:53,581 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-03-24 22:21:53,581 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 22:21:53,581 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:53,582 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 22:21:53,582 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:53,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1717627251, now seen corresponding path program 1 times [2021-03-24 22:21:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:53,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973309346] [2021-03-24 22:21:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:53,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,815 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:53,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:53,898 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 22:21:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973309346] [2021-03-24 22:21:53,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:53,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-03-24 22:21:53,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397553795] [2021-03-24 22:21:53,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-24 22:21:53,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-24 22:21:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-24 22:21:53,925 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 22:21:53,927 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 22:21:53,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:53,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 22:21:53,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:54,245 INFO L129 PetriNetUnfolder]: 79/236 cut-off events. [2021-03-24 22:21:54,245 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-03-24 22:21:54,247 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 22:21:54,250 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 41 selfloop transitions, 27 changer transitions 14/86 dead transitions. [2021-03-24 22:21:54,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 86 transitions, 357 flow [2021-03-24 22:21:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-24 22:21:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-03-24 22:21:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 248 transitions. [2021-03-24 22:21:54,261 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2021-03-24 22:21:54,262 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 248 transitions. [2021-03-24 22:21:54,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 248 transitions. [2021-03-24 22:21:54,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:54,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 248 transitions. [2021-03-24 22:21:54,268 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 22:21:54,273 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 22:21:54,274 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 22:21:54,275 INFO L185 Difference]: Start difference. First operand has 25 places, 20 transitions, 58 flow. Second operand 18 states and 248 transitions. [2021-03-24 22:21:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 86 transitions, 357 flow [2021-03-24 22:21:54,281 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 22:21:54,284 INFO L241 Difference]: Finished difference. Result has 50 places, 48 transitions, 240 flow [2021-03-24 22:21:54,285 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 22:21:54,286 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2021-03-24 22:21:54,286 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 240 flow [2021-03-24 22:21:54,286 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 22:21:54,286 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:54,287 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 22:21:54,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:21:54,287 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash 515928769, now seen corresponding path program 2 times [2021-03-24 22:21:54,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:54,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689911328] [2021-03-24 22:21:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:54,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,412 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 22:21:54,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689911328] [2021-03-24 22:21:54,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:54,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-03-24 22:21:54,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303359883] [2021-03-24 22:21:54,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-24 22:21:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-24 22:21:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-24 22:21:54,415 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 22:21:54,415 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 22:21:54,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:54,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 22:21:54,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:54,820 INFO L129 PetriNetUnfolder]: 142/452 cut-off events. [2021-03-24 22:21:54,820 INFO L130 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2021-03-24 22:21:54,824 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 22:21:54,828 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 75 selfloop transitions, 47 changer transitions 3/129 dead transitions. [2021-03-24 22:21:54,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 129 transitions, 1049 flow [2021-03-24 22:21:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-24 22:21:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-03-24 22:21:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 217 transitions. [2021-03-24 22:21:54,834 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2021-03-24 22:21:54,834 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 217 transitions. [2021-03-24 22:21:54,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 217 transitions. [2021-03-24 22:21:54,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:54,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 217 transitions. [2021-03-24 22:21:54,836 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 22:21:54,840 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 22:21:54,840 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 22:21:54,840 INFO L185 Difference]: Start difference. First operand has 50 places, 48 transitions, 240 flow. Second operand 14 states and 217 transitions. [2021-03-24 22:21:54,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 129 transitions, 1049 flow [2021-03-24 22:21:54,853 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 22:21:54,857 INFO L241 Difference]: Finished difference. Result has 59 places, 91 transitions, 664 flow [2021-03-24 22:21:54,857 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 22:21:54,858 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2021-03-24 22:21:54,858 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 91 transitions, 664 flow [2021-03-24 22:21:54,858 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 22:21:54,859 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:54,859 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 22:21:54,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:21:54,860 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1260868631, now seen corresponding path program 3 times [2021-03-24 22:21:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:54,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567553610] [2021-03-24 22:21:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:54,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:54,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:54,947 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 22:21:54,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567553610] [2021-03-24 22:21:54,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:54,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 22:21:54,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493325246] [2021-03-24 22:21:54,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 22:21:54,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 22:21:54,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-24 22:21:54,950 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 28 [2021-03-24 22:21:54,951 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 22:21:54,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:54,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 28 [2021-03-24 22:21:54,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:55,194 INFO L129 PetriNetUnfolder]: 161/554 cut-off events. [2021-03-24 22:21:55,195 INFO L130 PetriNetUnfolder]: For 2298/2298 co-relation queries the response was YES. [2021-03-24 22:21:55,197 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 22:21:55,201 INFO L132 encePairwiseOnDemand]: 17/28 looper letters, 102 selfloop transitions, 53 changer transitions 35/195 dead transitions. [2021-03-24 22:21:55,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 1818 flow [2021-03-24 22:21:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-24 22:21:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-24 22:21:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2021-03-24 22:21:55,203 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2021-03-24 22:21:55,203 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 192 transitions. [2021-03-24 22:21:55,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 192 transitions. [2021-03-24 22:21:55,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:55,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 192 transitions. [2021-03-24 22:21:55,204 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 22:21:55,205 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 22:21:55,205 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 22:21:55,206 INFO L185 Difference]: Start difference. First operand has 59 places, 91 transitions, 664 flow. Second operand 12 states and 192 transitions. [2021-03-24 22:21:55,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 1818 flow [2021-03-24 22:21:55,217 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 22:21:55,224 INFO L241 Difference]: Finished difference. Result has 75 places, 118 transitions, 1006 flow [2021-03-24 22:21:55,224 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 22:21:55,224 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2021-03-24 22:21:55,224 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 118 transitions, 1006 flow [2021-03-24 22:21:55,225 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 22:21:55,227 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:55,227 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 22:21:55,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 22:21:55,228 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1198838527, now seen corresponding path program 4 times [2021-03-24 22:21:55,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:55,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463295522] [2021-03-24 22:21:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:55,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,314 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 22:21:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463295522] [2021-03-24 22:21:55,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:55,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 22:21:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550195893] [2021-03-24 22:21:55,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 22:21:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 22:21:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-24 22:21:55,316 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 22:21:55,316 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 22:21:55,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:55,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 22:21:55,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:55,580 INFO L129 PetriNetUnfolder]: 159/596 cut-off events. [2021-03-24 22:21:55,581 INFO L130 PetriNetUnfolder]: For 3053/3053 co-relation queries the response was YES. [2021-03-24 22:21:55,584 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 22:21:55,586 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 98 selfloop transitions, 55 changer transitions 22/179 dead transitions. [2021-03-24 22:21:55,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 179 transitions, 1796 flow [2021-03-24 22:21:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-24 22:21:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-03-24 22:21:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2021-03-24 22:21:55,588 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2021-03-24 22:21:55,588 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 173 transitions. [2021-03-24 22:21:55,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 173 transitions. [2021-03-24 22:21:55,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:55,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 173 transitions. [2021-03-24 22:21:55,589 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 22:21:55,590 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 22:21:55,591 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 22:21:55,591 INFO L185 Difference]: Start difference. First operand has 75 places, 118 transitions, 1006 flow. Second operand 11 states and 173 transitions. [2021-03-24 22:21:55,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 179 transitions, 1796 flow [2021-03-24 22:21:55,606 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 22:21:55,611 INFO L241 Difference]: Finished difference. Result has 87 places, 123 transitions, 1183 flow [2021-03-24 22:21:55,612 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 22:21:55,612 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 62 predicate places. [2021-03-24 22:21:55,612 INFO L480 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 1183 flow [2021-03-24 22:21:55,612 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 22:21:55,613 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:55,613 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 22:21:55,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 22:21:55,613 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1055672017, now seen corresponding path program 5 times [2021-03-24 22:21:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:55,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969428945] [2021-03-24 22:21:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:55,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:55,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:55,738 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 22:21:55,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969428945] [2021-03-24 22:21:55,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:55,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-03-24 22:21:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540893125] [2021-03-24 22:21:55,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-24 22:21:55,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-24 22:21:55,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-24 22:21:55,740 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-24 22:21:55,740 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 22:21:55,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:55,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-24 22:21:55,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:56,141 INFO L129 PetriNetUnfolder]: 145/549 cut-off events. [2021-03-24 22:21:56,142 INFO L130 PetriNetUnfolder]: For 2473/2473 co-relation queries the response was YES. [2021-03-24 22:21:56,144 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 22:21:56,147 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 80 selfloop transitions, 67 changer transitions 18/169 dead transitions. [2021-03-24 22:21:56,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 169 transitions, 1975 flow [2021-03-24 22:21:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-24 22:21:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-03-24 22:21:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 233 transitions. [2021-03-24 22:21:56,149 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5200892857142857 [2021-03-24 22:21:56,149 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 233 transitions. [2021-03-24 22:21:56,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 233 transitions. [2021-03-24 22:21:56,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:56,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 233 transitions. [2021-03-24 22:21:56,150 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 22:21:56,151 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 22:21:56,151 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 22:21:56,151 INFO L185 Difference]: Start difference. First operand has 87 places, 123 transitions, 1183 flow. Second operand 16 states and 233 transitions. [2021-03-24 22:21:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 169 transitions, 1975 flow [2021-03-24 22:21:56,170 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 22:21:56,173 INFO L241 Difference]: Finished difference. Result has 97 places, 121 transitions, 1241 flow [2021-03-24 22:21:56,173 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 22:21:56,173 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2021-03-24 22:21:56,173 INFO L480 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1241 flow [2021-03-24 22:21:56,174 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 22:21:56,174 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:56,174 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 22:21:56,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 22:21:56,174 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:56,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1882554451, now seen corresponding path program 6 times [2021-03-24 22:21:56,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:56,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798126605] [2021-03-24 22:21:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:56,181 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:56,185 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:56,198 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:21:56,199 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:21:56,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 22:21:56,254 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:21:56 BasicIcfg [2021-03-24 22:21:56,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:21:56,261 INFO L168 Benchmark]: Toolchain (without parser) took 3334.45 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 236.9 MB in the beginning and 344.9 MB in the end (delta: -108.0 MB). Peak memory consumption was 123.5 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:56,261 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:21:56,261 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:56,262 INFO L168 Benchmark]: Boogie Preprocessor took 13.29 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 822.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:21:56,262 INFO L168 Benchmark]: RCFGBuilder took 204.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 240.4 MB in the end (delta: -6.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:56,263 INFO L168 Benchmark]: TraceAbstraction took 3084.76 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 239.9 MB in the beginning and 344.9 MB in the end (delta: -104.9 MB). Peak memory consumption was 125.9 MB. Max. memory is 16.0 GB. [2021-03-24 22:21:56,264 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 is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.29 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 822.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 204.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 240.4 MB in the end (delta: -6.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3084.76 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 239.9 MB in the beginning and 344.9 MB in the end (delta: -104.9 MB). Peak memory consumption was 125.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 199.1ms, 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: 44, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 44, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 44, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 22, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 131, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 131, negative conditional: 0, negative unconditional: 131, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 70, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 44, unknown conditional: 0, unknown unconditional: 44] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - 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: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2920.5ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1814.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 286.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 134 SDtfs, 167 SDslu, 153 SDs, 0 SdLazy, 1025 SolverSat, 246 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 551.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 757.7ms 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: 10.3ms SsaConstructionTime, 76.1ms SatisfiabilityAnalysisTime, 558.2ms 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...