/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/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:17:00,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:17:00,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:17:00,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:17:00,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:17:00,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:17:00,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:17:00,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:17:00,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:17:00,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:17:00,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:17:00,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:17:00,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:17:00,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:17:00,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:17:00,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:17:00,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:17:00,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:17:00,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:17:00,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:17:00,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:17:00,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:17:00,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:17:00,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:17:00,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-24 13:17:00,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-24 13:17:00,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-24 13:17:00,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-24 13:17:00,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-24 13:17:00,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-03-24 13:17:00,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:17:00,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:17:00,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:17:00,257 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 13:17:00,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:17:00,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:17:00,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:17:00,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:17:00,294 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:17:00,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:17:00,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:17:00,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:17:00,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:17:00,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:17:00,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:17:00,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:17:00,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:17:00,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:17:00,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:17:00,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:17:00,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:17:00,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:17:00,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:17:00,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:17:00,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:17:00,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:17:00,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:17:00,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:17:00,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:17:00,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:17:00,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:17:00,298 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:17:00,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:17:00,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:17:00,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:17:00,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:17:00,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:17:00,621 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:17:00,624 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:17:00,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-03-24 13:17:00,625 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-03-24 13:17:00,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:17:00,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:17:00,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:17:00,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:17:00,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:17:00,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:17:00,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:17:00,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:17:00,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:17:00,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/1) ... [2021-03-24 13:17:00,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:17:00,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:17:00,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:17:00,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:17:00,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (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 13:17:00,772 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:17:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:17:00,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:17:00,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-24 13:17:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-24 13:17:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-24 13:17:00,774 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 13:17:00,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:17:00,860 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-24 13:17:00,861 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:17:00 BoogieIcfgContainer [2021-03-24 13:17:00,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:17:00,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:17:00,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:17:00,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:17:00,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:17:00" (1/2) ... [2021-03-24 13:17:00,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd6886e and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:17:00, skipping insertion in model container [2021-03-24 13:17:00,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:17:00" (2/2) ... [2021-03-24 13:17:00,866 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-03-24 13:17:00,870 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:17:00,884 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:17:00,885 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:17:00,896 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:00,896 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:00,897 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:00,897 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:00,899 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:00,902 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:17:00,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 13:17:00,932 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:17:00,933 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:17:00,933 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:17:00,933 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:17:00,933 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:17:00,933 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:17:00,933 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:17:00,933 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:17:00,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-24 13:17:00,952 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 13:17:00,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:00,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:17:00,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 9 transitions, 23 flow [2021-03-24 13:17:00,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 9 transitions, 23 flow [2021-03-24 13:17:00,957 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:17:00,964 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-24 13:17:00,966 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-24 13:17:00,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-24 13:17:00,970 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 13:17:00,970 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:00,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 10 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:17:00,971 INFO L142 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-24 13:17:01,067 INFO L154 LiptonReduction]: Checked pairs total: 8 [2021-03-24 13:17:01,067 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 13:17:01,069 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 113 [2021-03-24 13:17:01,074 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-03-24 13:17:01,075 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,075 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:01,075 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-24 13:17:01,076 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-24 13:17:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-03-24 13:17:01,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:01,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902693529] [2021-03-24 13:17:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:01,140 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:01,143 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:01,154 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:17:01,155 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:17:01,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:17:01,155 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 13:17:01,156 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-24 13:17:01,159 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,160 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,160 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,160 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,161 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,161 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,161 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,161 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,162 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,163 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,164 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:17:01,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 13:17:01,167 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:17:01,167 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:17:01,167 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:17:01,167 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:17:01,167 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:17:01,167 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:17:01,167 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:17:01,167 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:17:01,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-24 13:17:01,173 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 13:17:01,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 13:17:01,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-03-24 13:17:01,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-03-24 13:17:01,174 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:17:01,174 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-24 13:17:01,175 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-24 13:17:01,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-24 13:17:01,179 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 13:17:01,179 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 13:17:01,180 INFO L142 LiptonReduction]: Number of co-enabled transitions 100 [2021-03-24 13:17:01,201 INFO L154 LiptonReduction]: Checked pairs total: 168 [2021-03-24 13:17:01,201 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 13:17:01,201 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 27 [2021-03-24 13:17:01,204 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 13:17:01,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,205 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:01,205 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-24 13:17:01,205 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1896722, now seen corresponding path program 1 times [2021-03-24 13:17:01,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:01,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945857268] [2021-03-24 13:17:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:01,211 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:01,214 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:01,215 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:17:01,231 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:17:01,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:17:01,232 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 13:17:01,233 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-24 13:17:01,239 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,239 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,239 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,240 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,240 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,240 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,241 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,241 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,241 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,242 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,242 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,242 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,243 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,245 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,246 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,250 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:17:01,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 13:17:01,253 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:17:01,253 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:17:01,253 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:17:01,253 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:17:01,253 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:17:01,253 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:17:01,253 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:17:01,254 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:17:01,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-24 13:17:01,266 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 13:17:01,266 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 13:17:01,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 21 transitions, 63 flow [2021-03-24 13:17:01,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 63 flow [2021-03-24 13:17:01,267 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:17:01,268 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-24 13:17:01,268 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-24 13:17:01,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-24 13:17:01,274 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 13:17:01,274 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 13:17:01,276 INFO L142 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-24 13:17:01,326 INFO L154 LiptonReduction]: Checked pairs total: 486 [2021-03-24 13:17:01,326 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 13:17:01,326 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 59 [2021-03-24 13:17:01,330 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-24 13:17:01,331 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,331 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:01,331 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 13:17:01,331 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash 80894512, now seen corresponding path program 1 times [2021-03-24 13:17:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:01,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964860319] [2021-03-24 13:17:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:01,424 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:01,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:01,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:01,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:01,467 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:01,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:01,473 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 13:17:01,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964860319] [2021-03-24 13:17:01,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:01,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:01,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445954888] [2021-03-24 13:17:01,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:01,500 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-03-24 13:17:01,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 13:17:01,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:01,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-03-24 13:17:01,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:17:01,757 INFO L129 PetriNetUnfolder]: 291/578 cut-off events. [2021-03-24 13:17:01,757 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 578 events. 291/578 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3168 event pairs, 91 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1139. Up to 175 conditions per place. [2021-03-24 13:17:01,775 INFO L132 encePairwiseOnDemand]: 13/24 looper letters, 28 selfloop transitions, 14 changer transitions 0/46 dead transitions. [2021-03-24 13:17:01,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 46 transitions, 197 flow [2021-03-24 13:17:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:17:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:17:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2021-03-24 13:17:01,787 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2021-03-24 13:17:01,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2021-03-24 13:17:01,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2021-03-24 13:17:01,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:17:01,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2021-03-24 13:17:01,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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 13:17:01,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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 13:17:01,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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 13:17:01,805 INFO L185 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 5 states and 83 transitions. [2021-03-24 13:17:01,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 46 transitions, 197 flow [2021-03-24 13:17:01,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-24 13:17:01,815 INFO L241 Difference]: Finished difference. Result has 33 places, 31 transitions, 171 flow [2021-03-24 13:17:01,816 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2021-03-24 13:17:01,817 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2021-03-24 13:17:01,817 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 171 flow [2021-03-24 13:17:01,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 13:17:01,817 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:01,818 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 13:17:01,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:17:01,818 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash 80901459, now seen corresponding path program 1 times [2021-03-24 13:17:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:01,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242869390] [2021-03-24 13:17:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:01,829 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:01,833 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:01,837 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:17:01,837 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:17:01,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 13:17:01,837 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 13:17:01,837 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-24 13:17:01,844 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,844 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,844 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,844 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,845 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,845 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,847 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,847 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,848 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,848 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,849 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,849 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,849 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,850 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,851 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,852 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,854 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,855 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:01,856 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:17:01,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-24 13:17:01,858 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:17:01,858 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:17:01,858 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:17:01,859 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:17:01,859 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:17:01,859 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:17:01,859 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:17:01,860 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:17:01,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-24 13:17:01,866 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-24 13:17:01,866 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 90 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 13:17:01,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 27 transitions, 86 flow [2021-03-24 13:17:01,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 27 transitions, 86 flow [2021-03-24 13:17:01,870 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:17:01,871 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-24 13:17:01,873 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-24 13:17:01,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-24 13:17:01,881 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-24 13:17:01,882 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 92 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 13:17:01,883 INFO L142 LiptonReduction]: Number of co-enabled transitions 440 [2021-03-24 13:17:01,932 INFO L154 LiptonReduction]: Checked pairs total: 890 [2021-03-24 13:17:01,932 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 13:17:01,933 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 63 [2021-03-24 13:17:01,935 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 13:17:01,935 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:01,935 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:01,935 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 13:17:01,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash 109667652, now seen corresponding path program 1 times [2021-03-24 13:17:01,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:01,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852712617] [2021-03-24 13:17:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:01,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:01,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:01,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:01,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:01,987 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:01,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:01,992 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 13:17:01,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852712617] [2021-03-24 13:17:01,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:01,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:01,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438970772] [2021-03-24 13:17:01,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:01,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:01,995 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-03-24 13:17:01,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:17:01,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:01,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-03-24 13:17:01,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:17:02,493 INFO L129 PetriNetUnfolder]: 2852/4507 cut-off events. [2021-03-24 13:17:02,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:02,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 4507 events. 2852/4507 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27924 event pairs, 882 based on Foata normal form. 0/3624 useless extension candidates. Maximal degree in co-relation 8993. Up to 1413 conditions per place. [2021-03-24 13:17:02,529 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 38 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2021-03-24 13:17:02,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 61 transitions, 266 flow [2021-03-24 13:17:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:17:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:17:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-03-24 13:17:02,531 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7032258064516129 [2021-03-24 13:17:02,531 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-03-24 13:17:02,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-03-24 13:17:02,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:17:02,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-03-24 13:17:02,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 13:17:02,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:17:02,534 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:17:02,534 INFO L185 Difference]: Start difference. First operand has 32 places, 23 transitions, 78 flow. Second operand 5 states and 109 transitions. [2021-03-24 13:17:02,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 61 transitions, 266 flow [2021-03-24 13:17:02,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 254 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-24 13:17:02,536 INFO L241 Difference]: Finished difference. Result has 40 places, 40 transitions, 222 flow [2021-03-24 13:17:02,536 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2021-03-24 13:17:02,536 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2021-03-24 13:17:02,537 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 222 flow [2021-03-24 13:17:02,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:17:02,537 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:02,537 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 13:17:02,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 13:17:02,537 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash -894759565, now seen corresponding path program 1 times [2021-03-24 13:17:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:02,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490366957] [2021-03-24 13:17:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:02,551 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:02,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:02,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:02,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:02,569 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:02,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 13:17:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490366957] [2021-03-24 13:17:02,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:02,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:02,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18455663] [2021-03-24 13:17:02,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:02,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:02,575 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-03-24 13:17:02,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:17:02,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:02,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-03-24 13:17:02,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:17:03,648 INFO L129 PetriNetUnfolder]: 5089/8173 cut-off events. [2021-03-24 13:17:03,648 INFO L130 PetriNetUnfolder]: For 3623/3623 co-relation queries the response was YES. [2021-03-24 13:17:03,668 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30065 conditions, 8173 events. 5089/8173 cut-off events. For 3623/3623 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 57423 event pairs, 1338 based on Foata normal form. 345/8514 useless extension candidates. Maximal degree in co-relation 30014. Up to 3282 conditions per place. [2021-03-24 13:17:03,731 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 56 selfloop transitions, 45 changer transitions 0/106 dead transitions. [2021-03-24 13:17:03,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 106 transitions, 789 flow [2021-03-24 13:17:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:17:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:17:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2021-03-24 13:17:03,733 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6838709677419355 [2021-03-24 13:17:03,733 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2021-03-24 13:17:03,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2021-03-24 13:17:03,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:17:03,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2021-03-24 13:17:03,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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 13:17:03,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:17:03,735 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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 13:17:03,735 INFO L185 Difference]: Start difference. First operand has 40 places, 40 transitions, 222 flow. Second operand 5 states and 106 transitions. [2021-03-24 13:17:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 106 transitions, 789 flow [2021-03-24 13:17:03,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 106 transitions, 789 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 13:17:03,753 INFO L241 Difference]: Finished difference. Result has 48 places, 81 transitions, 712 flow [2021-03-24 13:17:03,753 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=48, PETRI_TRANSITIONS=81} [2021-03-24 13:17:03,754 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2021-03-24 13:17:03,754 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 81 transitions, 712 flow [2021-03-24 13:17:03,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:17:03,754 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:03,754 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 13:17:03,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 13:17:03,754 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:03,755 INFO L82 PathProgramCache]: Analyzing trace with hash -894746661, now seen corresponding path program 1 times [2021-03-24 13:17:03,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:03,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014687909] [2021-03-24 13:17:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:03,758 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:03,760 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:03,761 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:17:03,761 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:17:03,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 13:17:03,762 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 13:17:03,762 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-24 13:17:03,766 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,766 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,766 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,766 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,767 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,767 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,768 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,769 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,769 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,769 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,769 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,770 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,771 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,771 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,772 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:03,773 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:17:03,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-24 13:17:03,774 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:17:03,774 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:17:03,774 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:17:03,774 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:17:03,774 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:17:03,774 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:17:03,774 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:17:03,774 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:17:03,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-24 13:17:03,777 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-24 13:17:03,777 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:03,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 116 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 13:17:03,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 33 transitions, 111 flow [2021-03-24 13:17:03,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 33 transitions, 111 flow [2021-03-24 13:17:03,778 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:17:03,778 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-24 13:17:03,779 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-24 13:17:03,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-24 13:17:03,781 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-24 13:17:03,781 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:03,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 139 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 13:17:03,782 INFO L142 LiptonReduction]: Number of co-enabled transitions 700 [2021-03-24 13:17:03,809 INFO L154 LiptonReduction]: Checked pairs total: 1466 [2021-03-24 13:17:03,810 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-24 13:17:03,810 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 32 [2021-03-24 13:17:03,812 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 13:17:03,812 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:03,812 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:03,812 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 13:17:03,812 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash 145120927, now seen corresponding path program 1 times [2021-03-24 13:17:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:03,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139942824] [2021-03-24 13:17:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:03,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:03,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:03,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:03,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:03,846 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:03,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:03,850 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 13:17:03,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139942824] [2021-03-24 13:17:03,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:03,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:03,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322114992] [2021-03-24 13:17:03,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:03,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:03,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:03,852 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2021-03-24 13:17:03,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 13:17:03,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:03,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2021-03-24 13:17:03,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:17:06,655 INFO L129 PetriNetUnfolder]: 22065/31144 cut-off events. [2021-03-24 13:17:06,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:06,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62309 conditions, 31144 events. 22065/31144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1684. Compared 204207 event pairs, 6846 based on Foata normal form. 0/25506 useless extension candidates. Maximal degree in co-relation 62263. Up to 10043 conditions per place. [2021-03-24 13:17:06,987 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 48 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2021-03-24 13:17:06,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 337 flow [2021-03-24 13:17:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:17:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:17:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2021-03-24 13:17:06,989 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2021-03-24 13:17:06,989 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2021-03-24 13:17:06,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2021-03-24 13:17:06,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:17:06,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2021-03-24 13:17:06,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 13:17:06,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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 13:17:06,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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 13:17:06,991 INFO L185 Difference]: Start difference. First operand has 39 places, 28 transitions, 101 flow. Second operand 5 states and 135 transitions. [2021-03-24 13:17:06,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 337 flow [2021-03-24 13:17:06,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 317 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-03-24 13:17:06,993 INFO L241 Difference]: Finished difference. Result has 47 places, 49 transitions, 273 flow [2021-03-24 13:17:06,993 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2021-03-24 13:17:06,994 INFO L343 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2021-03-24 13:17:06,994 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 273 flow [2021-03-24 13:17:06,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 13:17:06,994 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:06,994 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 13:17:06,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 13:17:06,994 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 204589902, now seen corresponding path program 1 times [2021-03-24 13:17:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146226481] [2021-03-24 13:17:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:07,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:07,007 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:07,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:07,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:07,019 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:07,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 13:17:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146226481] [2021-03-24 13:17:07,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:07,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:07,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140439910] [2021-03-24 13:17:07,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:07,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:07,024 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2021-03-24 13:17:07,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 13:17:07,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:07,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2021-03-24 13:17:07,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:17:13,046 INFO L129 PetriNetUnfolder]: 41526/59126 cut-off events. [2021-03-24 13:17:13,046 INFO L130 PetriNetUnfolder]: For 24287/24287 co-relation queries the response was YES. [2021-03-24 13:17:13,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 213625 conditions, 59126 events. 41526/59126 cut-off events. For 24287/24287 co-relation queries the response was YES. Maximal size of possible extension queue 3304. Compared 428547 event pairs, 15155 based on Foata normal form. 2010/61115 useless extension candidates. Maximal degree in co-relation 136267. Up to 23529 conditions per place. [2021-03-24 13:17:13,725 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 70 selfloop transitions, 56 changer transitions 0/132 dead transitions. [2021-03-24 13:17:13,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 132 transitions, 980 flow [2021-03-24 13:17:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:17:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:17:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2021-03-24 13:17:13,727 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6894736842105263 [2021-03-24 13:17:13,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 131 transitions. [2021-03-24 13:17:13,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 131 transitions. [2021-03-24 13:17:13,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:17:13,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 131 transitions. [2021-03-24 13:17:13,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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 13:17:13,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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 13:17:13,730 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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 13:17:13,730 INFO L185 Difference]: Start difference. First operand has 47 places, 49 transitions, 273 flow. Second operand 5 states and 131 transitions. [2021-03-24 13:17:13,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 132 transitions, 980 flow [2021-03-24 13:17:13,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 132 transitions, 980 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 13:17:13,921 INFO L241 Difference]: Finished difference. Result has 55 places, 100 transitions, 883 flow [2021-03-24 13:17:13,922 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=883, PETRI_PLACES=55, PETRI_TRANSITIONS=100} [2021-03-24 13:17:13,922 INFO L343 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2021-03-24 13:17:13,922 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 100 transitions, 883 flow [2021-03-24 13:17:13,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 13:17:13,922 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:13,922 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:17:13,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 13:17:13,923 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2048027829, now seen corresponding path program 1 times [2021-03-24 13:17:13,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:13,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215715403] [2021-03-24 13:17:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:13,927 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:17:13,929 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:17:13,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:17:13,930 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:17:13,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 13:17:13,930 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 13:17:13,931 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-24 13:17:13,935 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,935 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,936 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,936 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,936 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,936 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,936 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,936 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,937 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,937 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,937 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,937 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,940 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,941 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,941 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,941 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,941 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,941 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,942 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,942 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,943 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,944 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,944 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,945 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:17:13,946 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:17:13,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-24 13:17:13,947 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:17:13,947 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:17:13,947 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:17:13,947 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:17:13,947 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:17:13,947 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:17:13,947 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:17:13,947 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:17:13,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-24 13:17:13,952 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-24 13:17:13,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:13,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 13:17:13,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 39 transitions, 138 flow [2021-03-24 13:17:13,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 138 flow [2021-03-24 13:17:13,953 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:17:13,953 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-24 13:17:13,953 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-24 13:17:13,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-24 13:17:13,956 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-24 13:17:13,956 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:13,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 157 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 13:17:13,957 INFO L142 LiptonReduction]: Number of co-enabled transitions 1020 [2021-03-24 13:17:13,991 INFO L154 LiptonReduction]: Checked pairs total: 2120 [2021-03-24 13:17:13,991 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-24 13:17:13,991 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 38 [2021-03-24 13:17:13,993 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 13:17:13,993 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:13,993 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:13,993 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 13:17:13,993 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash 187284127, now seen corresponding path program 1 times [2021-03-24 13:17:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:13,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982833152] [2021-03-24 13:17:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:14,004 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:14,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:14,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:14,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:14,015 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:14,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:14,017 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 13:17:14,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982833152] [2021-03-24 13:17:14,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:14,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:14,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122949392] [2021-03-24 13:17:14,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:14,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:14,019 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-24 13:17:14,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:17:14,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:14,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-24 13:17:14,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:17:35,698 INFO L129 PetriNetUnfolder]: 151182/199409 cut-off events. [2021-03-24 13:17:35,699 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:17:36,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398846 conditions, 199409 events. 151182/199409 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8130. Compared 1347972 event pairs, 46742 based on Foata normal form. 0/165338 useless extension candidates. Maximal degree in co-relation 398789. Up to 64869 conditions per place. [2021-03-24 13:17:37,560 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 58 selfloop transitions, 26 changer transitions 0/91 dead transitions. [2021-03-24 13:17:37,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 91 transitions, 410 flow [2021-03-24 13:17:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:17:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:17:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-03-24 13:17:37,562 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7155555555555555 [2021-03-24 13:17:37,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-03-24 13:17:37,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-03-24 13:17:37,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:17:37,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-03-24 13:17:37,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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 13:17:37,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 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 13:17:37,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 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 13:17:37,564 INFO L185 Difference]: Start difference. First operand has 46 places, 33 transitions, 126 flow. Second operand 5 states and 161 transitions. [2021-03-24 13:17:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 91 transitions, 410 flow [2021-03-24 13:17:37,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 91 transitions, 380 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-03-24 13:17:37,566 INFO L241 Difference]: Finished difference. Result has 54 places, 58 transitions, 324 flow [2021-03-24 13:17:37,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2021-03-24 13:17:37,566 INFO L343 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2021-03-24 13:17:37,566 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 324 flow [2021-03-24 13:17:37,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:17:37,567 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:17:37,567 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 13:17:37,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 13:17:37,567 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:17:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:17:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1511038456, now seen corresponding path program 1 times [2021-03-24 13:17:37,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:17:37,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554914348] [2021-03-24 13:17:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:17:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:17:37,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:37,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:37,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:17:37,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:17:37,589 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:17:37,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:17:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 13:17:37,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554914348] [2021-03-24 13:17:37,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:17:37,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:17:37,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051480295] [2021-03-24 13:17:37,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:17:37,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:17:37,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:17:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:17:37,593 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-24 13:17:37,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:17:37,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:17:37,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-24 13:17:37,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:18:53,846 INFO L129 PetriNetUnfolder]: 290971/385945 cut-off events. [2021-03-24 13:18:53,847 INFO L130 PetriNetUnfolder]: For 168541/168541 co-relation queries the response was YES. [2021-03-24 13:18:55,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378680 conditions, 385945 events. 290971/385945 cut-off events. For 168541/168541 co-relation queries the response was YES. Maximal size of possible extension queue 16280. Compared 2835859 event pairs, 77696 based on Foata normal form. 11295/397166 useless extension candidates. Maximal degree in co-relation 995116. Up to 151596 conditions per place. [2021-03-24 13:18:57,610 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 84 selfloop transitions, 67 changer transitions 0/158 dead transitions. [2021-03-24 13:18:57,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 158 transitions, 1171 flow [2021-03-24 13:18:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:18:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:18:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-24 13:18:57,614 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-03-24 13:18:57,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-24 13:18:57,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-24 13:18:57,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:18:57,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-24 13:18:57,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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 13:18:57,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 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 13:18:57,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 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 13:18:57,615 INFO L185 Difference]: Start difference. First operand has 54 places, 58 transitions, 324 flow. Second operand 5 states and 156 transitions. [2021-03-24 13:18:57,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 158 transitions, 1171 flow [2021-03-24 13:18:59,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 158 transitions, 1171 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 13:18:59,197 INFO L241 Difference]: Finished difference. Result has 62 places, 119 transitions, 1054 flow [2021-03-24 13:18:59,198 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1054, PETRI_PLACES=62, PETRI_TRANSITIONS=119} [2021-03-24 13:18:59,198 INFO L343 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2021-03-24 13:18:59,198 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 119 transitions, 1054 flow [2021-03-24 13:18:59,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:18:59,198 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:18:59,198 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:18:59,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 13:18:59,198 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:18:59,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:18:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash -401922614, now seen corresponding path program 1 times [2021-03-24 13:18:59,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:18:59,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504209554] [2021-03-24 13:18:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:18:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:18:59,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:18:59,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:18:59,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:18:59,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:18:59,219 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:18:59,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:18:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-24 13:18:59,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504209554] [2021-03-24 13:18:59,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:18:59,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:18:59,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716211229] [2021-03-24 13:18:59,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:18:59,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:18:59,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:18:59,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:18:59,224 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-24 13:18:59,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 119 transitions, 1054 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:18:59,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:18:59,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-24 13:18:59,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:23:31,202 INFO L129 PetriNetUnfolder]: 534473/712039 cut-off events. [2021-03-24 13:23:31,202 INFO L130 PetriNetUnfolder]: For 1201646/1201648 co-relation queries the response was YES. [2021-03-24 13:23:34,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3505864 conditions, 712039 events. 534473/712039 cut-off events. For 1201646/1201648 co-relation queries the response was YES. Maximal size of possible extension queue 31035. Compared 5630607 event pairs, 125326 based on Foata normal form. 20284/732260 useless extension candidates. Maximal degree in co-relation 3505833. Up to 279467 conditions per place. [2021-03-24 13:23:39,469 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 114 selfloop transitions, 152 changer transitions 0/273 dead transitions. [2021-03-24 13:23:39,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 273 transitions, 2951 flow [2021-03-24 13:23:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 13:23:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 13:23:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-24 13:23:39,470 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-03-24 13:23:39,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-24 13:23:39,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-24 13:23:39,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:23:39,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-24 13:23:39,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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 13:23:39,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 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 13:23:39,472 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 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 13:23:39,472 INFO L185 Difference]: Start difference. First operand has 62 places, 119 transitions, 1054 flow. Second operand 5 states and 156 transitions. [2021-03-24 13:23:39,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 273 transitions, 2951 flow [2021-03-24 13:23:50,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 273 transitions, 2951 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 13:23:50,506 INFO L241 Difference]: Finished difference. Result has 69 places, 228 transitions, 2731 flow [2021-03-24 13:23:50,506 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2731, PETRI_PLACES=69, PETRI_TRANSITIONS=228} [2021-03-24 13:23:50,506 INFO L343 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2021-03-24 13:23:50,506 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 228 transitions, 2731 flow [2021-03-24 13:23:50,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:23:50,506 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:23:50,507 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:23:50,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 13:23:50,507 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:23:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:23:50,507 INFO L82 PathProgramCache]: Analyzing trace with hash 219245625, now seen corresponding path program 1 times [2021-03-24 13:23:50,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:23:50,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694978299] [2021-03-24 13:23:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:23:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:23:50,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:23:50,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:23:50,527 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:23:50,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:23:50,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:23:50,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:23:50,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:23:50,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:23:50,545 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:23:50,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:23:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-24 13:23:50,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694978299] [2021-03-24 13:23:50,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:23:50,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:23:50,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955551614] [2021-03-24 13:23:50,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 13:23:50,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:23:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 13:23:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-24 13:23:50,552 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2021-03-24 13:23:50,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 228 transitions, 2731 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 13:23:50,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:23:50,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2021-03-24 13:23:50,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown [2021-03-24 13:28:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:28:59,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 13:28:59,376 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-24 13:28:59,391 WARN L224 ceAbstractionStarter]: Timeout [2021-03-24 13:28:59,392 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:28:59 BasicIcfg [2021-03-24 13:28:59,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:28:59,392 INFO L168 Benchmark]: Toolchain (without parser) took 718735.45 ms. Allocated memory was 255.9 MB in the beginning and 15.1 GB in the end (delta: 14.8 GB). Free memory was 237.0 MB in the beginning and 7.2 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. [2021-03-24 13:28:59,393 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:28:59,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.49 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:28:59,395 INFO L168 Benchmark]: Boogie Preprocessor took 15.63 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: 916.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:28:59,396 INFO L168 Benchmark]: RCFGBuilder took 157.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 226.8 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 13:28:59,399 INFO L168 Benchmark]: TraceAbstraction took 718529.53 ms. Allocated memory was 255.9 MB in the beginning and 15.1 GB in the end (delta: 14.8 GB). Free memory was 226.4 MB in the beginning and 7.2 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. [2021-03-24 13:28:59,401 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 237.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.49 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.63 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: 916.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 157.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 226.8 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 718529.53 ms. Allocated memory was 255.9 MB in the beginning and 15.1 GB in the end (delta: 14.8 GB). Free memory was 226.4 MB in the beginning and 7.2 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 101.2ms, 12 PlacesBefore, 9 PlacesAfterwards, 9 TransitionsBefore, 6 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 8 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26.5ms, 20 PlacesBefore, 18 PlacesAfterwards, 15 TransitionsBefore, 13 TransitionsAfterwards, 100 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 168 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 78, positive: 56, positive conditional: 0, positive unconditional: 56, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 47, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 47, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 78, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 47, unknown conditional: 0, unknown unconditional: 47] , Statistics on independence cache: Total cache size (in pairs): 25, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 57.9ms, 28 PlacesBefore, 25 PlacesAfterwards, 21 TransitionsBefore, 18 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 486 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 121, positive: 84, positive conditional: 0, positive unconditional: 84, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 66, positive: 53, positive conditional: 0, positive unconditional: 53, 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: 66, positive: 53, positive conditional: 0, positive unconditional: 53, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 121, positive: 31, positive conditional: 0, positive unconditional: 31, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 66, unknown conditional: 0, unknown unconditional: 66] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 59.8ms, 36 PlacesBefore, 32 PlacesAfterwards, 27 TransitionsBefore, 23 TransitionsAfterwards, 440 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 890 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 270, positive: 222, positive conditional: 0, positive unconditional: 222, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 157, positive: 135, positive conditional: 0, positive unconditional: 135, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 157, positive: 135, positive conditional: 0, positive unconditional: 135, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 270, positive: 87, positive conditional: 0, positive unconditional: 87, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 157, unknown conditional: 0, unknown unconditional: 157] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 31.2ms, 44 PlacesBefore, 39 PlacesAfterwards, 33 TransitionsBefore, 28 TransitionsAfterwards, 700 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 1466 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 320, positive: 259, positive conditional: 0, positive unconditional: 259, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 203, positive: 174, positive conditional: 0, positive unconditional: 174, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 203, positive: 174, positive conditional: 0, positive unconditional: 174, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 320, positive: 85, positive conditional: 0, positive unconditional: 85, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 203, unknown conditional: 0, unknown unconditional: 203] , Statistics on independence cache: Total cache size (in pairs): 78, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 38.0ms, 52 PlacesBefore, 46 PlacesAfterwards, 39 TransitionsBefore, 33 TransitionsAfterwards, 1020 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 2120 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 491, positive: 419, positive conditional: 0, positive unconditional: 419, negative: 72, negative conditional: 0, negative unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 312, positive: 276, positive conditional: 0, positive unconditional: 276, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 312, positive: 276, positive conditional: 0, positive unconditional: 276, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 491, positive: 143, positive conditional: 0, positive unconditional: 143, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 312, unknown conditional: 0, unknown unconditional: 312] , Statistics on independence cache: Total cache size (in pairs): 136, Positive cache size: 106, Positive conditional cache size: 0, Positive unconditional cache size: 106, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 19). Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (5states, 12/45 universal loopers) in iteration 4,while PetriNetUnfolder was constructing finite prefix that currently has 4918127 conditions, 844537 events (640296/844536 cut-off events. For 2465325/2465325 co-relation queries the response was YES. Maximal size of possible extension queue 40789. Compared 6761860 event pairs, 163097 based on Foata normal form. 13014/873073 useless extension candidates. Maximal degree in co-relation 4918055. Up to 322784 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. Started 6 CEGAR loops. EmptinessCheckTime: 11.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 718368.2ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 717348.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 402.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 283 SDtfs, 352 SDslu, 193 SDs, 0 SdLazy, 580 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 564.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 221.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2731occurred in iteration=3, InterpolantAutomatonStates: 40, 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: 8.2ms SsaConstructionTime, 45.3ms SatisfiabilityAnalysisTime, 347.0ms InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 7/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout !SESSION 2021-03-24 13:16:58.887 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9.1 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -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/fork_loop_local.bpl Command-line arguments: -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/fork_loop_local.bpl !ENTRY org.eclipse.osgi 4 0 2021-03-24 13:28:59.694 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c5d4e39/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c5d4e39/.metadata/.log.