/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:29:00,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:29:00,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:29:00,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:29:00,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:29:00,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:29:00,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:29:00,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:29:00,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:29:00,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:29:00,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:29:00,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:29:00,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:29:00,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:29:00,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:29:00,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:29:00,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:29:00,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:29:00,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:29:00,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:29:00,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:29:00,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:29:00,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:29:00,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:29:00,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 22:29:00,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:29:00,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:29:00,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:29:00,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 22:29:00,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:29:00,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:29:00,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:29:00,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:29:00,878 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:29:00,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:29:00,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:29:00,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:29:00,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:29:00,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:29:00,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:29:00,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:29:00,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:29:00,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:29:00,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:29:01,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:29:01,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:29:01,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:29:01,115 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:29:01,115 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:29:01,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-03-11 22:29:01,116 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-03-11 22:29:01,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:29:01,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:29:01,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:29:01,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:29:01,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:29:01,154 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 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,160 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 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:29:01,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:29:01,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:29:01,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:29:01,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/1) ... [2021-03-11 22:29:01,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:29:01,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:29:01,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:29:01,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:29:01,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (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 [2021-03-11 22:29:01,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 22:29:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:29:01,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:29:01,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-11 22:29:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-11 22:29:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-11 22:29:01,237 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:29:01,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:29:01,323 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-11 22:29:01,324 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:29:01 BoogieIcfgContainer [2021-03-11 22:29:01,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:29:01,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:29:01,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:29:01,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:29:01,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:29:01" (1/2) ... [2021-03-11 22:29:01,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d16681e and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:29:01, skipping insertion in model container [2021-03-11 22:29:01,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:29:01" (2/2) ... [2021-03-11 22:29:01,330 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-03-11 22:29:01,335 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:29:01,337 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:29:01,338 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:29:01,354 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,354 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,355 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,358 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,362 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,364 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:29:01,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 22:29:01,400 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:29:01,400 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:29:01,400 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:29:01,400 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:29:01,400 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:29:01,400 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:29:01,400 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:29:01,400 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:29:01,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-11 22:29:01,415 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 22:29:01,415 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,416 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. [2021-03-11 22:29:01,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 9 transitions, 23 flow [2021-03-11 22:29:01,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 9 transitions, 23 flow [2021-03-11 22:29:01,420 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:29:01,428 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-11 22:29:01,432 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-11 22:29:01,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-11 22:29:01,438 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 22:29:01,438 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,439 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. [2021-03-11 22:29:01,442 INFO L116 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-11 22:29:01,559 INFO L131 LiptonReduction]: Checked pairs total: 8 [2021-03-11 22:29:01,559 INFO L133 LiptonReduction]: Total number of compositions: 4 [2021-03-11 22:29:01,560 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 142 [2021-03-11 22:29:01,584 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-03-11 22:29:01,584 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,584 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:01,585 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-11 22:29:01,585 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 22:29:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:01,588 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-03-11 22:29:01,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:01,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218313605] [2021-03-11 22:29:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:01,633 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:01,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:01,645 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:29:01,645 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:29:01,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:29:01,646 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 22:29:01,646 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-11 22:29:01,649 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,649 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,649 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,650 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,650 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,650 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,650 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,650 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,651 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,652 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,652 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:29:01,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 22:29:01,654 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:29:01,654 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:29:01,654 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:29:01,654 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:29:01,654 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:29:01,654 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:29:01,654 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:29:01,654 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:29:01,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 22:29:01,657 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 22:29:01,657 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,658 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. [2021-03-11 22:29:01,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 22:29:01,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-03-11 22:29:01,658 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:29:01,658 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-11 22:29:01,658 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-11 22:29:01,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 22:29:01,661 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 22:29:01,661 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,661 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. [2021-03-11 22:29:01,662 INFO L116 LiptonReduction]: Number of co-enabled transitions 100 [2021-03-11 22:29:01,736 INFO L131 LiptonReduction]: Checked pairs total: 184 [2021-03-11 22:29:01,736 INFO L133 LiptonReduction]: Total number of compositions: 2 [2021-03-11 22:29:01,736 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 78 [2021-03-11 22:29:01,738 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-11 22:29:01,738 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,739 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:01,739 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-11 22:29:01,739 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1896722, now seen corresponding path program 1 times [2021-03-11 22:29:01,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:01,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699842776] [2021-03-11 22:29:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:01,742 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:01,744 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:01,745 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:29:01,745 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:29:01,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:29:01,745 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 22:29:01,746 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-11 22:29:01,752 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,753 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,753 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,754 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,754 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,755 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,755 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,755 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,756 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,756 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,756 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,756 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,757 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,759 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,759 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:01,761 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:29:01,761 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 22:29:01,765 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:29:01,765 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:29:01,765 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:29:01,765 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:29:01,765 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:29:01,766 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:29:01,766 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:29:01,768 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:29:01,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-11 22:29:01,780 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-11 22:29:01,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,782 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. [2021-03-11 22:29:01,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 21 transitions, 63 flow [2021-03-11 22:29:01,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 63 flow [2021-03-11 22:29:01,783 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:29:01,783 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-11 22:29:01,784 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-11 22:29:01,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-11 22:29:01,789 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-11 22:29:01,789 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,789 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. [2021-03-11 22:29:01,789 INFO L116 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-11 22:29:01,859 INFO L131 LiptonReduction]: Checked pairs total: 482 [2021-03-11 22:29:01,859 INFO L133 LiptonReduction]: Total number of compositions: 3 [2021-03-11 22:29:01,859 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 76 [2021-03-11 22:29:01,868 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 22:29:01,868 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:01,868 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:01,868 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 22:29:01,869 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash 80894512, now seen corresponding path program 1 times [2021-03-11 22:29:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:01,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872148628] [2021-03-11 22:29:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:01,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:01,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:01,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:01,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:01,950 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:01,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:29:01,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872148628] [2021-03-11 22:29:01,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:01,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:01,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354705978] [2021-03-11 22:29:01,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:01,970 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-03-11 22:29:01,971 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) [2021-03-11 22:29:01,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:01,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-03-11 22:29:01,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:29:02,117 INFO L129 PetriNetUnfolder]: 291/578 cut-off events. [2021-03-11 22:29:02,117 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:02,120 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. [2021-03-11 22:29:02,126 INFO L132 encePairwiseOnDemand]: 13/24 looper letters, 28 selfloop transitions, 14 changer transitions 0/46 dead transitions. [2021-03-11 22:29:02,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 46 transitions, 197 flow [2021-03-11 22:29:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:29:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:29:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2021-03-11 22:29:02,134 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2021-03-11 22:29:02,134 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2021-03-11 22:29:02,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2021-03-11 22:29:02,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:29:02,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2021-03-11 22:29:02,137 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) [2021-03-11 22:29:02,139 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) [2021-03-11 22:29:02,139 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) [2021-03-11 22:29:02,140 INFO L185 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 5 states and 83 transitions. [2021-03-11 22:29:02,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 46 transitions, 197 flow [2021-03-11 22:29:02,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-11 22:29:02,144 INFO L241 Difference]: Finished difference. Result has 33 places, 31 transitions, 171 flow [2021-03-11 22:29:02,145 INFO L318 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} [2021-03-11 22:29:02,145 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2021-03-11 22:29:02,146 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 171 flow [2021-03-11 22:29:02,146 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) [2021-03-11 22:29:02,146 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:02,146 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 22:29:02,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 22:29:02,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash 80901459, now seen corresponding path program 1 times [2021-03-11 22:29:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:02,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103601500] [2021-03-11 22:29:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:02,150 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:02,151 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:02,152 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:29:02,152 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:29:02,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 22:29:02,152 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 22:29:02,152 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-11 22:29:02,155 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,156 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,157 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,158 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,159 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,160 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,161 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:02,161 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:29:02,161 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 22:29:02,162 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:29:02,162 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:29:02,162 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:29:02,162 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:29:02,162 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:29:02,162 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:29:02,162 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:29:02,162 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:29:02,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-11 22:29:02,165 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-11 22:29:02,165 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:02,165 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. [2021-03-11 22:29:02,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 27 transitions, 86 flow [2021-03-11 22:29:02,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 27 transitions, 86 flow [2021-03-11 22:29:02,169 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:29:02,169 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-11 22:29:02,170 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-11 22:29:02,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-11 22:29:02,172 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-11 22:29:02,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:02,173 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. [2021-03-11 22:29:02,173 INFO L116 LiptonReduction]: Number of co-enabled transitions 440 [2021-03-11 22:29:02,238 INFO L131 LiptonReduction]: Checked pairs total: 894 [2021-03-11 22:29:02,238 INFO L133 LiptonReduction]: Total number of compositions: 4 [2021-03-11 22:29:02,238 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 69 [2021-03-11 22:29:02,240 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-11 22:29:02,240 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:02,240 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:02,240 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 22:29:02,240 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash 109667652, now seen corresponding path program 1 times [2021-03-11 22:29:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:02,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093338222] [2021-03-11 22:29:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:02,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:02,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:02,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:02,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:02,279 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:02,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:29:02,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093338222] [2021-03-11 22:29:02,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:02,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:02,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47770235] [2021-03-11 22:29:02,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:02,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:02,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:02,284 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-03-11 22:29:02,285 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) [2021-03-11 22:29:02,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:02,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-03-11 22:29:02,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:29:02,618 INFO L129 PetriNetUnfolder]: 2852/4507 cut-off events. [2021-03-11 22:29:02,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:02,625 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 27883 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. [2021-03-11 22:29:02,644 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 38 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2021-03-11 22:29:02,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 61 transitions, 266 flow [2021-03-11 22:29:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:29:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:29:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-03-11 22:29:02,645 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7032258064516129 [2021-03-11 22:29:02,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-03-11 22:29:02,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-03-11 22:29:02,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:29:02,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-03-11 22:29:02,646 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) [2021-03-11 22:29:02,647 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) [2021-03-11 22:29:02,647 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) [2021-03-11 22:29:02,647 INFO L185 Difference]: Start difference. First operand has 32 places, 23 transitions, 78 flow. Second operand 5 states and 109 transitions. [2021-03-11 22:29:02,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 61 transitions, 266 flow [2021-03-11 22:29:02,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 254 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-11 22:29:02,649 INFO L241 Difference]: Finished difference. Result has 40 places, 40 transitions, 222 flow [2021-03-11 22:29:02,649 INFO L318 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} [2021-03-11 22:29:02,649 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2021-03-11 22:29:02,649 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 222 flow [2021-03-11 22:29:02,649 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) [2021-03-11 22:29:02,649 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:02,649 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:29:02,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 22:29:02,649 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:02,650 INFO L82 PathProgramCache]: Analyzing trace with hash -894759565, now seen corresponding path program 1 times [2021-03-11 22:29:02,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:02,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210060354] [2021-03-11 22:29:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:02,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:02,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:02,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:02,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:02,667 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:02,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 22:29:02,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210060354] [2021-03-11 22:29:02,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:02,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:02,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076426523] [2021-03-11 22:29:02,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:02,671 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-03-11 22:29:02,671 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) [2021-03-11 22:29:02,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:02,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-03-11 22:29:02,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:29:03,223 INFO L129 PetriNetUnfolder]: 5089/8173 cut-off events. [2021-03-11 22:29:03,223 INFO L130 PetriNetUnfolder]: For 3623/3623 co-relation queries the response was YES. [2021-03-11 22:29:03,238 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 57398 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. [2021-03-11 22:29:03,287 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 56 selfloop transitions, 45 changer transitions 0/106 dead transitions. [2021-03-11 22:29:03,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 106 transitions, 789 flow [2021-03-11 22:29:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:29:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:29:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2021-03-11 22:29:03,288 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6838709677419355 [2021-03-11 22:29:03,288 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2021-03-11 22:29:03,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2021-03-11 22:29:03,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:29:03,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2021-03-11 22:29:03,289 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) [2021-03-11 22:29:03,289 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) [2021-03-11 22:29:03,290 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) [2021-03-11 22:29:03,290 INFO L185 Difference]: Start difference. First operand has 40 places, 40 transitions, 222 flow. Second operand 5 states and 106 transitions. [2021-03-11 22:29:03,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 106 transitions, 789 flow [2021-03-11 22:29:03,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 106 transitions, 789 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 22:29:03,304 INFO L241 Difference]: Finished difference. Result has 48 places, 81 transitions, 712 flow [2021-03-11 22:29:03,304 INFO L318 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} [2021-03-11 22:29:03,304 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2021-03-11 22:29:03,304 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 81 transitions, 712 flow [2021-03-11 22:29:03,305 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) [2021-03-11 22:29:03,305 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:03,305 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:29:03,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 22:29:03,305 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash -894746661, now seen corresponding path program 1 times [2021-03-11 22:29:03,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:03,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408056621] [2021-03-11 22:29:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:03,308 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:03,309 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:03,311 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:29:03,312 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:29:03,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 22:29:03,312 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 22:29:03,312 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-11 22:29:03,317 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,317 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,317 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,317 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,318 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,320 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,322 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,323 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,323 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,324 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:03,324 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:29:03,325 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-11 22:29:03,325 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:29:03,325 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:29:03,325 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:29:03,325 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:29:03,325 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:29:03,325 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:29:03,325 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:29:03,326 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:29:03,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-11 22:29:03,330 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 22:29:03,330 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:03,330 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. [2021-03-11 22:29:03,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 33 transitions, 111 flow [2021-03-11 22:29:03,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 33 transitions, 111 flow [2021-03-11 22:29:03,331 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:29:03,331 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-11 22:29:03,331 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-11 22:29:03,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-11 22:29:03,334 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 22:29:03,334 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:03,336 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. [2021-03-11 22:29:03,337 INFO L116 LiptonReduction]: Number of co-enabled transitions 700 [2021-03-11 22:29:03,430 INFO L131 LiptonReduction]: Checked pairs total: 1462 [2021-03-11 22:29:03,430 INFO L133 LiptonReduction]: Total number of compositions: 5 [2021-03-11 22:29:03,430 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 99 [2021-03-11 22:29:03,431 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 22:29:03,431 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:03,431 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:03,431 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 22:29:03,432 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash 145120927, now seen corresponding path program 1 times [2021-03-11 22:29:03,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:03,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374861239] [2021-03-11 22:29:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:03,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:03,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:03,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:03,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:03,456 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:03,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:29:03,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374861239] [2021-03-11 22:29:03,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:03,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:03,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919621049] [2021-03-11 22:29:03,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:03,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:03,459 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2021-03-11 22:29:03,460 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) [2021-03-11 22:29:03,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:03,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2021-03-11 22:29:03,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:29:05,477 INFO L129 PetriNetUnfolder]: 22065/31144 cut-off events. [2021-03-11 22:29:05,477 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:05,655 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 204098 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. [2021-03-11 22:29:05,805 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 48 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2021-03-11 22:29:05,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 337 flow [2021-03-11 22:29:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:29:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:29:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2021-03-11 22:29:05,809 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2021-03-11 22:29:05,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2021-03-11 22:29:05,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2021-03-11 22:29:05,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:29:05,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2021-03-11 22:29:05,810 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) [2021-03-11 22:29:05,811 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) [2021-03-11 22:29:05,811 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) [2021-03-11 22:29:05,811 INFO L185 Difference]: Start difference. First operand has 39 places, 28 transitions, 101 flow. Second operand 5 states and 135 transitions. [2021-03-11 22:29:05,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 337 flow [2021-03-11 22:29:05,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 317 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-03-11 22:29:05,813 INFO L241 Difference]: Finished difference. Result has 47 places, 49 transitions, 273 flow [2021-03-11 22:29:05,813 INFO L318 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} [2021-03-11 22:29:05,814 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2021-03-11 22:29:05,814 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 273 flow [2021-03-11 22:29:05,814 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) [2021-03-11 22:29:05,814 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:05,814 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:29:05,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 22:29:05,814 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash 204589902, now seen corresponding path program 1 times [2021-03-11 22:29:05,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:05,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559763897] [2021-03-11 22:29:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:05,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:05,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:05,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:05,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:05,851 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:05,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 22:29:05,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559763897] [2021-03-11 22:29:05,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:05,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:05,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393382858] [2021-03-11 22:29:05,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:05,857 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2021-03-11 22:29:05,857 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) [2021-03-11 22:29:05,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:05,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2021-03-11 22:29:05,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:29:10,316 INFO L129 PetriNetUnfolder]: 41526/59126 cut-off events. [2021-03-11 22:29:10,316 INFO L130 PetriNetUnfolder]: For 24287/24287 co-relation queries the response was YES. [2021-03-11 22:29:10,604 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. [2021-03-11 22:29:10,927 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 70 selfloop transitions, 56 changer transitions 0/132 dead transitions. [2021-03-11 22:29:10,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 132 transitions, 980 flow [2021-03-11 22:29:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:29:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:29:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2021-03-11 22:29:10,928 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6894736842105263 [2021-03-11 22:29:10,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 131 transitions. [2021-03-11 22:29:10,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 131 transitions. [2021-03-11 22:29:10,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:29:10,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 131 transitions. [2021-03-11 22:29:10,929 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) [2021-03-11 22:29:10,930 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) [2021-03-11 22:29:10,930 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) [2021-03-11 22:29:10,930 INFO L185 Difference]: Start difference. First operand has 47 places, 49 transitions, 273 flow. Second operand 5 states and 131 transitions. [2021-03-11 22:29:10,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 132 transitions, 980 flow [2021-03-11 22:29:11,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 132 transitions, 980 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 22:29:11,068 INFO L241 Difference]: Finished difference. Result has 55 places, 100 transitions, 883 flow [2021-03-11 22:29:11,068 INFO L318 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} [2021-03-11 22:29:11,068 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2021-03-11 22:29:11,068 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 100 transitions, 883 flow [2021-03-11 22:29:11,068 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) [2021-03-11 22:29:11,068 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:11,068 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:29:11,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 22:29:11,068 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2048027829, now seen corresponding path program 1 times [2021-03-11 22:29:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:11,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196322666] [2021-03-11 22:29:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:11,071 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:29:11,072 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:29:11,073 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:29:11,073 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:29:11,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 22:29:11,073 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 22:29:11,074 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-11 22:29:11,077 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,078 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,079 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,080 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,080 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,080 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,080 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,080 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,080 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,081 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,081 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,082 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,082 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,083 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:29:11,083 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:29:11,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-11 22:29:11,084 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:29:11,084 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:29:11,084 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:29:11,084 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:29:11,084 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:29:11,084 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:29:11,084 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:29:11,084 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:29:11,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-11 22:29:11,087 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-11 22:29:11,087 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:11,087 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. [2021-03-11 22:29:11,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 39 transitions, 138 flow [2021-03-11 22:29:11,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 138 flow [2021-03-11 22:29:11,088 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:29:11,088 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-11 22:29:11,088 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-11 22:29:11,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-11 22:29:11,090 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-11 22:29:11,090 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:11,090 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. [2021-03-11 22:29:11,090 INFO L116 LiptonReduction]: Number of co-enabled transitions 1020 [2021-03-11 22:29:11,170 INFO L131 LiptonReduction]: Checked pairs total: 2242 [2021-03-11 22:29:11,171 INFO L133 LiptonReduction]: Total number of compositions: 6 [2021-03-11 22:29:11,171 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 83 [2021-03-11 22:29:11,172 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-11 22:29:11,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:11,172 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:11,172 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 22:29:11,172 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:11,173 INFO L82 PathProgramCache]: Analyzing trace with hash 187284127, now seen corresponding path program 1 times [2021-03-11 22:29:11,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:11,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702007394] [2021-03-11 22:29:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:11,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:11,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:11,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:11,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:11,200 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:11,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:29:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702007394] [2021-03-11 22:29:11,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:11,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:11,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951203650] [2021-03-11 22:29:11,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:11,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:11,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:11,204 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-11 22:29:11,204 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) [2021-03-11 22:29:11,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:11,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-11 22:29:11,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:29:28,456 INFO L129 PetriNetUnfolder]: 151182/199409 cut-off events. [2021-03-11 22:29:28,456 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:29:29,403 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 8132. Compared 1348005 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. [2021-03-11 22:29:30,154 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 58 selfloop transitions, 26 changer transitions 0/91 dead transitions. [2021-03-11 22:29:30,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 91 transitions, 410 flow [2021-03-11 22:29:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:29:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:29:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-03-11 22:29:30,155 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7155555555555555 [2021-03-11 22:29:30,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-03-11 22:29:30,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-03-11 22:29:30,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:29:30,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-03-11 22:29:30,156 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) [2021-03-11 22:29:30,156 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) [2021-03-11 22:29:30,157 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) [2021-03-11 22:29:30,157 INFO L185 Difference]: Start difference. First operand has 46 places, 33 transitions, 126 flow. Second operand 5 states and 161 transitions. [2021-03-11 22:29:30,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 91 transitions, 410 flow [2021-03-11 22:29:30,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 91 transitions, 380 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-03-11 22:29:30,158 INFO L241 Difference]: Finished difference. Result has 54 places, 58 transitions, 324 flow [2021-03-11 22:29:30,158 INFO L318 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} [2021-03-11 22:29:30,158 INFO L335 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2021-03-11 22:29:30,158 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 324 flow [2021-03-11 22:29:30,159 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) [2021-03-11 22:29:30,159 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:29:30,159 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:29:30,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 22:29:30,159 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:29:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:29:30,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1511038456, now seen corresponding path program 1 times [2021-03-11 22:29:30,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:29:30,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672994335] [2021-03-11 22:29:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:29:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:29:30,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:30,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:30,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:29:30,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:29:30,176 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:29:30,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:29:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 22:29:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672994335] [2021-03-11 22:29:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:29:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:29:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361591524] [2021-03-11 22:29:30,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:29:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:29:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:29:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:29:30,180 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-11 22:29:30,180 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) [2021-03-11 22:29:30,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:29:30,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-11 22:29:30,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:30:37,720 INFO L129 PetriNetUnfolder]: 290971/385945 cut-off events. [2021-03-11 22:30:37,720 INFO L130 PetriNetUnfolder]: For 168541/168541 co-relation queries the response was YES. [2021-03-11 22:30:39,360 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. [2021-03-11 22:30:41,162 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 84 selfloop transitions, 67 changer transitions 0/158 dead transitions. [2021-03-11 22:30:41,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 158 transitions, 1171 flow [2021-03-11 22:30:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:30:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:30:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-11 22:30:41,163 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-03-11 22:30:41,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-11 22:30:41,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-11 22:30:41,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:30:41,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-11 22:30:41,164 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) [2021-03-11 22:30:41,164 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) [2021-03-11 22:30:41,165 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) [2021-03-11 22:30:41,165 INFO L185 Difference]: Start difference. First operand has 54 places, 58 transitions, 324 flow. Second operand 5 states and 156 transitions. [2021-03-11 22:30:41,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 158 transitions, 1171 flow [2021-03-11 22:30:42,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 158 transitions, 1171 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 22:30:42,650 INFO L241 Difference]: Finished difference. Result has 62 places, 119 transitions, 1054 flow [2021-03-11 22:30:42,650 INFO L318 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} [2021-03-11 22:30:42,651 INFO L335 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2021-03-11 22:30:42,651 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 119 transitions, 1054 flow [2021-03-11 22:30:42,651 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) [2021-03-11 22:30:42,651 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:30:42,651 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:30:42,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 22:30:42,651 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:30:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:30:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash -401922614, now seen corresponding path program 1 times [2021-03-11 22:30:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:30:42,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374293030] [2021-03-11 22:30:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:30:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:30:42,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:30:42,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:30:42,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:30:42,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:30:42,681 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:30:42,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:30:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 22:30:42,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374293030] [2021-03-11 22:30:42,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:30:42,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:30:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619066022] [2021-03-11 22:30:42,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:30:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:30:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:30:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:30:42,684 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2021-03-11 22:30:42,684 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) [2021-03-11 22:30:42,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:30:42,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2021-03-11 22:30:42,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:41,739 INFO L129 PetriNetUnfolder]: 534473/712039 cut-off events. [2021-03-11 22:34:41,739 INFO L130 PetriNetUnfolder]: For 1201646/1201648 co-relation queries the response was YES. [2021-03-11 22:34:45,584 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. [2021-03-11 22:34:49,728 INFO L132 encePairwiseOnDemand]: 25/45 looper letters, 114 selfloop transitions, 152 changer transitions 0/273 dead transitions. [2021-03-11 22:34:49,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 273 transitions, 2951 flow [2021-03-11 22:34:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:34:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:34:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-11 22:34:49,729 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-03-11 22:34:49,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-11 22:34:49,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-11 22:34:49,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:49,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-11 22:34:49,730 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) [2021-03-11 22:34:49,731 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) [2021-03-11 22:34:49,731 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) [2021-03-11 22:34:49,731 INFO L185 Difference]: Start difference. First operand has 62 places, 119 transitions, 1054 flow. Second operand 5 states and 156 transitions. [2021-03-11 22:34:49,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 273 transitions, 2951 flow [2021-03-11 22:34:56,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 273 transitions, 2951 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 22:34:56,221 INFO L241 Difference]: Finished difference. Result has 69 places, 228 transitions, 2731 flow [2021-03-11 22:34:56,221 INFO L318 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} [2021-03-11 22:34:56,221 INFO L335 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2021-03-11 22:34:56,221 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 228 transitions, 2731 flow [2021-03-11 22:34:56,221 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) [2021-03-11 22:34:56,221 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:56,221 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:56,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 22:34:56,222 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:56,222 INFO L82 PathProgramCache]: Analyzing trace with hash 219245625, now seen corresponding path program 1 times [2021-03-11 22:34:56,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:56,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552649394] [2021-03-11 22:34:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:56,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:56,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:34:56,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:56,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:34:56,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:56,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:34:56,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:56,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:34:56,242 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:34:56,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:34:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 22:34:56,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552649394] [2021-03-11 22:34:56,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:56,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:34:56,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168337352] [2021-03-11 22:34:56,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:34:56,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:56,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:34:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:34:56,245 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2021-03-11 22:34:56,245 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) [2021-03-11 22:34:56,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:56,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2021-03-11 22:34:56,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:40:20,505 INFO L129 PetriNetUnfolder]: 686142/917835 cut-off events. [2021-03-11 22:40:20,523 INFO L130 PetriNetUnfolder]: For 2641746/2641746 co-relation queries the response was YES. [2021-03-11 22:40:27,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5401133 conditions, 917835 events. 686142/917835 cut-off events. For 2641746/2641746 co-relation queries the response was YES. Maximal size of possible extension queue 40789. Compared 7471150 event pairs, 174392 based on Foata normal form. 14390/932180 useless extension candidates. Maximal degree in co-relation 5401061. Up to 353486 conditions per place. [2021-03-11 22:40:33,973 INFO L132 encePairwiseOnDemand]: 24/45 looper letters, 238 selfloop transitions, 210 changer transitions 0/454 dead transitions. [2021-03-11 22:40:33,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 454 transitions, 6014 flow [2021-03-11 22:40:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 22:40:33,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 22:40:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2021-03-11 22:40:33,980 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6864197530864198 [2021-03-11 22:40:33,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 278 transitions. [2021-03-11 22:40:33,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 278 transitions. [2021-03-11 22:40:33,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:40:33,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 278 transitions. [2021-03-11 22:40:33,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 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) [2021-03-11 22:40:33,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 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) [2021-03-11 22:40:33,988 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 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) [2021-03-11 22:40:33,988 INFO L185 Difference]: Start difference. First operand has 69 places, 228 transitions, 2731 flow. Second operand 9 states and 278 transitions. [2021-03-11 22:40:33,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 454 transitions, 6014 flow Received shutdown request... [2021-03-11 22:40:34,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 22:40:34,128 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 22:40:34,130 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 22:40:34,130 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:40:34 BasicIcfg [2021-03-11 22:40:34,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:40:34,131 INFO L168 Benchmark]: Toolchain (without parser) took 692988.72 ms. Allocated memory was 331.4 MB in the beginning and 13.8 GB in the end (delta: 13.5 GB). Free memory was 312.0 MB in the beginning and 5.2 GB in the end (delta: -4.9 GB). Peak memory consumption was 9.2 GB. Max. memory is 16.0 GB. [2021-03-11 22:40:34,131 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 331.4 MB. Free memory was 313.0 MB in the beginning and 312.9 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:40:34,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.93 ms. Allocated memory is still 331.4 MB. Free memory was 311.5 MB in the beginning and 310.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:40:34,132 INFO L168 Benchmark]: Boogie Preprocessor took 11.41 ms. Allocated memory is still 331.4 MB. Free memory was 310.0 MB in the beginning and 309.1 MB in the end (delta: 877.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:40:34,132 INFO L168 Benchmark]: RCFGBuilder took 146.27 ms. Allocated memory is still 331.4 MB. Free memory was 309.0 MB in the beginning and 301.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-03-11 22:40:34,132 INFO L168 Benchmark]: TraceAbstraction took 692804.60 ms. Allocated memory was 331.4 MB in the beginning and 13.8 GB in the end (delta: 13.5 GB). Free memory was 300.6 MB in the beginning and 5.2 GB in the end (delta: -4.9 GB). Peak memory consumption was 9.2 GB. Max. memory is 16.0 GB. [2021-03-11 22:40:34,138 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 0.09 ms. Allocated memory is still 331.4 MB. Free memory was 313.0 MB in the beginning and 312.9 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.93 ms. Allocated memory is still 331.4 MB. Free memory was 311.5 MB in the beginning and 310.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.41 ms. Allocated memory is still 331.4 MB. Free memory was 310.0 MB in the beginning and 309.1 MB in the end (delta: 877.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 146.27 ms. Allocated memory is still 331.4 MB. Free memory was 309.0 MB in the beginning and 301.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 692804.60 ms. Allocated memory was 331.4 MB in the beginning and 13.8 GB in the end (delta: 13.5 GB). Free memory was 300.6 MB in the beginning and 5.2 GB in the end (delta: -4.9 GB). Peak memory consumption was 9.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 127.6ms, 12 PlacesBefore, 9 PlacesAfterwards, 9 TransitionsBefore, 6 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 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: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ 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] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 77.7ms, 20 PlacesBefore, 18 PlacesAfterwards, 15 TransitionsBefore, 13 TransitionsAfterwards, 100 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 184 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 126, positive: 102, positive conditional: 0, positive unconditional: 102, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 73, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 73, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 56, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 126, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 73, unknown conditional: 0, unknown unconditional: 73] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 75.2ms, 28 PlacesBefore, 25 PlacesAfterwards, 21 TransitionsBefore, 18 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 482 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 123, positive: 86, positive conditional: 0, positive unconditional: 86, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 86, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 86, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 19, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 47, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 123, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 86, unknown conditional: 0, unknown unconditional: 86] , Statistics on independence cache: Total cache size (in pairs): 32, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 67.7ms, 36 PlacesBefore, 32 PlacesAfterwards, 27 TransitionsBefore, 23 TransitionsAfterwards, 440 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 894 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 167, positive: 119, positive conditional: 0, positive unconditional: 119, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 122, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 122, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 40, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 167, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 122, unknown conditional: 0, unknown unconditional: 122] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 99.2ms, 44 PlacesBefore, 39 PlacesAfterwards, 33 TransitionsBefore, 28 TransitionsAfterwards, 700 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 1462 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 214, positive: 153, positive conditional: 0, positive unconditional: 153, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 171, positive: 140, positive conditional: 0, positive unconditional: 140, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 171, positive: 140, positive conditional: 0, positive unconditional: 140, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 66, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 214, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 171, unknown conditional: 0, unknown unconditional: 171] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 82.6ms, 52 PlacesBefore, 46 PlacesAfterwards, 39 TransitionsBefore, 33 TransitionsAfterwards, 1020 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 2242 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 327, positive: 251, positive conditional: 0, positive unconditional: 251, negative: 76, negative conditional: 0, negative unconditional: 76, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 254, positive: 215, positive conditional: 0, positive unconditional: 215, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 254, positive: 215, positive conditional: 0, positive unconditional: 215, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 39, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 56, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 327, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 254, unknown conditional: 0, unknown unconditional: 254] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 19). Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. Started 6 CEGAR loops. EmptinessCheckTime: 11.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 692671.2ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 691591.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 625.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 283 SDtfs, 352 SDslu, 193 SDs, 0 SdLazy, 580 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 422.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 157.0ms 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: 6.6ms SsaConstructionTime, 35.6ms SatisfiabilityAnalysisTime, 263.1ms 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 Completed graceful shutdown !SESSION 2021-03-11 22:28:59.822 ----------------------------------------------- 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-SemanticLbe.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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl !ENTRY org.eclipse.osgi 4 0 2021-03-11 22:40:34.406 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb8cef994/.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/bb8cef994/.metadata/.log.