/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-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 17:44:09,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 17:44:09,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 17:44:09,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 17:44:09,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 17:44:09,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 17:44:09,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 17:44:09,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 17:44:09,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 17:44:09,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 17:44:09,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 17:44:09,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 17:44:09,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 17:44:09,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 17:44:09,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 17:44:09,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 17:44:09,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 17:44:09,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 17:44:09,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 17:44:09,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 17:44:09,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 17:44:09,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 17:44:09,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 17:44:09,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 17:44:09,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 17:44:09,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-25 17:44:09,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-25 17:44:09,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-25 17:44:09,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-25 17:44:09,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-25 17:44:09,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-25 17:44:09,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-25 17:44:09,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-25 17:44:09,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 17:44:09,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 17:44:09,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 17:44:09,697 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-RepeatedSemanticLbe.epf [2021-03-25 17:44:09,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 17:44:09,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 17:44:09,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 17:44:09,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 17:44:09,727 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 17:44:09,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 17:44:09,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 17:44:09,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 17:44:09,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 17:44:09,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 17:44:09,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 17:44:09,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 17:44:09,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 17:44:09,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 17:44:09,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 17:44:09,730 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 17:44:09,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 17:44:10,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 17:44:10,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 17:44:10,027 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 17:44:10,028 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 17:44:10,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl [2021-03-25 17:44:10,029 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl' [2021-03-25 17:44:10,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 17:44:10,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 17:44:10,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 17:44:10,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 17:44:10,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 17:44:10,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 17:44:10,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 17:44:10,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 17:44:10,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 17:44:10,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/1) ... [2021-03-25 17:44:10,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 17:44:10,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 17:44:10,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 17:44:10,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 17:44:10,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (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 [2021-03-25 17:44:10,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 17:44:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 17:44:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 17:44:10,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-25 17:44:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-25 17:44:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-25 17:44:10,146 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 17:44:10,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 17:44:10,234 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 17:44:10,235 INFO L202 PluginConnector]: Adding new model pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 05:44:10 BoogieIcfgContainer [2021-03-25 17:44:10,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 17:44:10,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 17:44:10,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 17:44:10,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 17:44:10,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:44:10" (1/2) ... [2021-03-25 17:44:10,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586c0533 and model type pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 05:44:10, skipping insertion in model container [2021-03-25 17:44:10,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 05:44:10" (2/2) ... [2021-03-25 17:44:10,240 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread_nondet_loop_bound.bpl [2021-03-25 17:44:10,243 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 17:44:10,246 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 17:44:10,246 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 17:44:10,258 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,258 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,258 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,258 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,260 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,262 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:44:10,274 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 17:44:10,289 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:44:10,289 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:44:10,289 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:44:10,289 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:44:10,289 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:44:10,289 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:44:10,289 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:44:10,289 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:44:10,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 13 transitions, 31 flow [2021-03-25 17:44:10,308 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-25 17:44:10,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:44:10,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 17:44:10,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 13 transitions, 31 flow [2021-03-25 17:44:10,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 13 transitions, 31 flow [2021-03-25 17:44:10,325 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:10,334 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 13 transitions, 31 flow [2021-03-25 17:44:10,336 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 13 transitions, 31 flow [2021-03-25 17:44:10,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 13 transitions, 31 flow [2021-03-25 17:44:10,339 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-25 17:44:10,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:44:10,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 17:44:10,341 INFO L142 LiptonReduction]: Number of co-enabled transitions 50 [2021-03-25 17:44:10,444 INFO L154 LiptonReduction]: Checked pairs total: 23 [2021-03-25 17:44:10,444 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 17:44:10,445 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 133 [2021-03-25 17:44:10,451 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 17:44:10,451 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:44:10,451 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:10,452 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-25 17:44:10,452 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 17:44:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1984598, now seen corresponding path program 1 times [2021-03-25 17:44:10,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:10,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408986597] [2021-03-25 17:44:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:10,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:10,535 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:10,541 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:10,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:10,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408986597] [2021-03-25 17:44:10,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:44:10,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 17:44:10,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279292650] [2021-03-25 17:44:10,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 17:44:10,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:10,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 17:44:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 17:44:10,566 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2021-03-25 17:44:10,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-03-25 17:44:10,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:10,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2021-03-25 17:44:10,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:10,602 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2021-03-25 17:44:10,602 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:44:10,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 8 conditions per place. [2021-03-25 17:44:10,603 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 3/12 dead transitions. [2021-03-25 17:44:10,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 12 transitions, 51 flow [2021-03-25 17:44:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 17:44:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 17:44:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 24 transitions. [2021-03-25 17:44:10,612 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2021-03-25 17:44:10,612 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 24 transitions. [2021-03-25 17:44:10,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 24 transitions. [2021-03-25 17:44:10,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:10,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 24 transitions. [2021-03-25 17:44:10,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-03-25 17:44:10,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-03-25 17:44:10,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-03-25 17:44:10,619 INFO L185 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 4 states and 24 transitions. [2021-03-25 17:44:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 12 transitions, 51 flow [2021-03-25 17:44:10,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 12 transitions, 51 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 17:44:10,622 INFO L241 Difference]: Finished difference. Result has 14 places, 7 transitions, 29 flow [2021-03-25 17:44:10,623 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=29, PETRI_PLACES=14, PETRI_TRANSITIONS=7} [2021-03-25 17:44:10,624 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 3 predicate places. [2021-03-25 17:44:10,624 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:10,624 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 7 transitions, 29 flow [2021-03-25 17:44:10,624 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 7 transitions, 29 flow [2021-03-25 17:44:10,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 7 transitions, 29 flow [2021-03-25 17:44:10,627 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-25 17:44:10,627 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:44:10,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 7 events. 0/7 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 17:44:10,627 INFO L142 LiptonReduction]: Number of co-enabled transitions 6 [2021-03-25 17:44:10,661 INFO L154 LiptonReduction]: Checked pairs total: 1 [2021-03-25 17:44:10,661 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 17:44:10,662 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 38 [2021-03-25 17:44:10,663 INFO L480 AbstractCegarLoop]: Abstraction has has 11 places, 5 transitions, 23 flow [2021-03-25 17:44:10,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-03-25 17:44:10,663 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:10,663 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2021-03-25 17:44:10,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 17:44:10,663 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 17:44:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1907180049, now seen corresponding path program 1 times [2021-03-25 17:44:10,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:10,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14933134] [2021-03-25 17:44:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:44:10,669 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:44:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:44:10,673 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:44:10,681 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:44:10,682 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:44:10,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 17:44:10,683 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-25 17:44:10,683 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-25 17:44:10,686 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,686 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,686 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,686 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,687 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,687 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,687 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,687 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,688 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,689 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:10,690 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:44:10,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-25 17:44:10,691 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:44:10,692 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:44:10,692 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:44:10,692 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:44:10,692 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:44:10,692 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:44:10,692 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:44:10,692 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:44:10,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2021-03-25 17:44:10,697 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-03-25 17:44:10,697 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 17:44:10,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 26 events. 0/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 17:44:10,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 50 flow [2021-03-25 17:44:10,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2021-03-25 17:44:10,698 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:10,698 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 19 transitions, 50 flow [2021-03-25 17:44:10,698 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 19 transitions, 50 flow [2021-03-25 17:44:10,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2021-03-25 17:44:10,702 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-03-25 17:44:10,702 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 17:44:10,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 26 events. 0/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 17:44:10,703 INFO L142 LiptonReduction]: Number of co-enabled transitions 160 [2021-03-25 17:44:10,762 INFO L154 LiptonReduction]: Checked pairs total: 238 [2021-03-25 17:44:10,763 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 17:44:10,763 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 65 [2021-03-25 17:44:10,765 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 17:44:10,765 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 17:44:10,766 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:10,766 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 17:44:10,766 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1417102048, now seen corresponding path program 1 times [2021-03-25 17:44:10,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:10,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231273886] [2021-03-25 17:44:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:10,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:10,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:10,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:10,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:10,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:10,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:10,789 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:10,789 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231273886] [2021-03-25 17:44:10,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:44:10,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 17:44:10,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539243995] [2021-03-25 17:44:10,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 17:44:10,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 17:44:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-25 17:44:10,796 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2021-03-25 17:44:10,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-03-25 17:44:10,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:10,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2021-03-25 17:44:10,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:10,938 INFO L129 PetriNetUnfolder]: 192/397 cut-off events. [2021-03-25 17:44:10,938 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-25 17:44:10,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 397 events. 192/397 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1915 event pairs, 23 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 726. Up to 119 conditions per place. [2021-03-25 17:44:10,942 INFO L132 encePairwiseOnDemand]: 13/23 looper letters, 38 selfloop transitions, 17 changer transitions 5/61 dead transitions. [2021-03-25 17:44:10,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 61 transitions, 264 flow [2021-03-25 17:44:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-25 17:44:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-25 17:44:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2021-03-25 17:44:10,944 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.46956521739130436 [2021-03-25 17:44:10,944 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 108 transitions. [2021-03-25 17:44:10,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 108 transitions. [2021-03-25 17:44:10,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:10,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 108 transitions. [2021-03-25 17:44:10,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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) [2021-03-25 17:44:10,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 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) [2021-03-25 17:44:10,947 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 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) [2021-03-25 17:44:10,947 INFO L185 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 10 states and 108 transitions. [2021-03-25 17:44:10,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 61 transitions, 264 flow [2021-03-25 17:44:10,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 262 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-03-25 17:44:10,949 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 173 flow [2021-03-25 17:44:10,949 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=173, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2021-03-25 17:44:10,949 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2021-03-25 17:44:10,949 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:10,949 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 31 transitions, 173 flow [2021-03-25 17:44:10,950 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 31 transitions, 173 flow [2021-03-25 17:44:10,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 173 flow [2021-03-25 17:44:10,959 INFO L129 PetriNetUnfolder]: 35/124 cut-off events. [2021-03-25 17:44:10,959 INFO L130 PetriNetUnfolder]: For 135/153 co-relation queries the response was YES. [2021-03-25 17:44:10,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 124 events. 35/124 cut-off events. For 135/153 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 665 event pairs, 10 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 370. Up to 49 conditions per place. [2021-03-25 17:44:10,961 INFO L142 LiptonReduction]: Number of co-enabled transitions 156 [2021-03-25 17:44:11,027 INFO L154 LiptonReduction]: Checked pairs total: 51 [2021-03-25 17:44:11,027 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-25 17:44:11,027 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 78 [2021-03-25 17:44:11,028 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 170 flow [2021-03-25 17:44:11,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-03-25 17:44:11,028 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:11,028 INFO L263 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2021-03-25 17:44:11,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 17:44:11,029 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:11,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1892406986, now seen corresponding path program 1 times [2021-03-25 17:44:11,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:11,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293479875] [2021-03-25 17:44:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:44:11,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:44:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:44:11,038 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:44:11,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:44:11,039 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:44:11,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 17:44:11,039 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-25 17:44:11,040 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-25 17:44:11,043 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,043 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,043 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,043 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,044 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,045 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,045 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,046 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,046 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:11,047 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:44:11,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-25 17:44:11,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:44:11,048 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:44:11,048 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:44:11,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:44:11,048 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:44:11,048 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:44:11,048 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:44:11,048 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:44:11,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2021-03-25 17:44:11,051 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-03-25 17:44:11,051 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 17:44:11,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 36 events. 0/36 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 17:44:11,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2021-03-25 17:44:11,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 71 flow [2021-03-25 17:44:11,052 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:11,052 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 25 transitions, 71 flow [2021-03-25 17:44:11,052 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 25 transitions, 71 flow [2021-03-25 17:44:11,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2021-03-25 17:44:11,054 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-03-25 17:44:11,054 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 17:44:11,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 36 events. 0/36 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 17:44:11,055 INFO L142 LiptonReduction]: Number of co-enabled transitions 330 [2021-03-25 17:44:11,124 INFO L154 LiptonReduction]: Checked pairs total: 603 [2021-03-25 17:44:11,124 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-25 17:44:11,124 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 72 [2021-03-25 17:44:11,126 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 17:44:11,126 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 17:44:11,126 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:11,126 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 17:44:11,126 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash -239330753, now seen corresponding path program 1 times [2021-03-25 17:44:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:11,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871419931] [2021-03-25 17:44:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:11,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:11,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:11,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:11,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:11,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871419931] [2021-03-25 17:44:11,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:44:11,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 17:44:11,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400315755] [2021-03-25 17:44:11,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 17:44:11,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 17:44:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-25 17:44:11,153 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2021-03-25 17:44:11,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2021-03-25 17:44:11,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:11,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2021-03-25 17:44:11,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:11,466 INFO L129 PetriNetUnfolder]: 2284/3731 cut-off events. [2021-03-25 17:44:11,466 INFO L130 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2021-03-25 17:44:11,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7649 conditions, 3731 events. 2284/3731 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21906 event pairs, 349 based on Foata normal form. 0/2862 useless extension candidates. Maximal degree in co-relation 5492. Up to 1027 conditions per place. [2021-03-25 17:44:11,483 INFO L132 encePairwiseOnDemand]: 17/30 looper letters, 69 selfloop transitions, 28 changer transitions 1/99 dead transitions. [2021-03-25 17:44:11,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 99 transitions, 460 flow [2021-03-25 17:44:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-25 17:44:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-25 17:44:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2021-03-25 17:44:11,485 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2021-03-25 17:44:11,485 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 160 transitions. [2021-03-25 17:44:11,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 160 transitions. [2021-03-25 17:44:11,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:11,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 160 transitions. [2021-03-25 17:44:11,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 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) [2021-03-25 17:44:11,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 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) [2021-03-25 17:44:11,488 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 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) [2021-03-25 17:44:11,488 INFO L185 Difference]: Start difference. First operand has 27 places, 20 transitions, 61 flow. Second operand 10 states and 160 transitions. [2021-03-25 17:44:11,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 99 transitions, 460 flow [2021-03-25 17:44:11,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 99 transitions, 444 flow, removed 8 selfloop flow, removed 0 redundant places. [2021-03-25 17:44:11,490 INFO L241 Difference]: Finished difference. Result has 44 places, 50 transitions, 279 flow [2021-03-25 17:44:11,491 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=279, PETRI_PLACES=44, PETRI_TRANSITIONS=50} [2021-03-25 17:44:11,491 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2021-03-25 17:44:11,491 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:11,491 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 50 transitions, 279 flow [2021-03-25 17:44:11,491 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 50 transitions, 279 flow [2021-03-25 17:44:11,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 50 transitions, 279 flow [2021-03-25 17:44:11,534 INFO L129 PetriNetUnfolder]: 418/876 cut-off events. [2021-03-25 17:44:11,535 INFO L130 PetriNetUnfolder]: For 889/1148 co-relation queries the response was YES. [2021-03-25 17:44:11,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2926 conditions, 876 events. 418/876 cut-off events. For 889/1148 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6082 event pairs, 147 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 2884. Up to 350 conditions per place. [2021-03-25 17:44:11,543 INFO L142 LiptonReduction]: Number of co-enabled transitions 428 [2021-03-25 17:44:11,587 INFO L154 LiptonReduction]: Checked pairs total: 511 [2021-03-25 17:44:11,587 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 17:44:11,587 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 96 [2021-03-25 17:44:11,588 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 49 transitions, 276 flow [2021-03-25 17:44:11,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2021-03-25 17:44:11,588 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:11,588 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:44:11,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 17:44:11,588 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash -791227592, now seen corresponding path program 1 times [2021-03-25 17:44:11,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:11,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547183539] [2021-03-25 17:44:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:11,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:11,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:11,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:11,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-25 17:44:11,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547183539] [2021-03-25 17:44:11,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056009967] [2021-03-25 17:44:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:11,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-25 17:44:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 17:44:11,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:11,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:11,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:11,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:11,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:11,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:11,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:11,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:11,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:11,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:11,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:11,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:11,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:11,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:11,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:11,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:11,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:11,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:11,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 17:44:11,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-03-25 17:44:11,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817921717] [2021-03-25 17:44:11,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-25 17:44:11,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-25 17:44:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-25 17:44:11,870 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2021-03-25 17:44:11,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 276 flow. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 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) [2021-03-25 17:44:11,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:11,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2021-03-25 17:44:11,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:13,055 INFO L129 PetriNetUnfolder]: 4367/7593 cut-off events. [2021-03-25 17:44:13,056 INFO L130 PetriNetUnfolder]: For 11348/11348 co-relation queries the response was YES. [2021-03-25 17:44:13,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28372 conditions, 7593 events. 4367/7593 cut-off events. For 11348/11348 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 56202 event pairs, 709 based on Foata normal form. 411/8004 useless extension candidates. Maximal degree in co-relation 15825. Up to 2102 conditions per place. [2021-03-25 17:44:13,104 INFO L132 encePairwiseOnDemand]: 17/32 looper letters, 159 selfloop transitions, 115 changer transitions 2/277 dead transitions. [2021-03-25 17:44:13,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 277 transitions, 2023 flow [2021-03-25 17:44:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-25 17:44:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-03-25 17:44:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 299 transitions. [2021-03-25 17:44:13,108 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.4671875 [2021-03-25 17:44:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 299 transitions. [2021-03-25 17:44:13,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 299 transitions. [2021-03-25 17:44:13,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:13,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 299 transitions. [2021-03-25 17:44:13,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 14.95) internal successors, (299), 20 states have internal predecessors, (299), 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) [2021-03-25 17:44:13,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 32.0) internal successors, (672), 21 states have internal predecessors, (672), 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) [2021-03-25 17:44:13,113 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 32.0) internal successors, (672), 21 states have internal predecessors, (672), 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) [2021-03-25 17:44:13,113 INFO L185 Difference]: Start difference. First operand has 43 places, 49 transitions, 276 flow. Second operand 20 states and 299 transitions. [2021-03-25 17:44:13,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 277 transitions, 2023 flow [2021-03-25 17:44:13,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 277 transitions, 1989 flow, removed 17 selfloop flow, removed 1 redundant places. [2021-03-25 17:44:13,208 INFO L241 Difference]: Finished difference. Result has 76 places, 151 transitions, 1387 flow [2021-03-25 17:44:13,208 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1387, PETRI_PLACES=76, PETRI_TRANSITIONS=151} [2021-03-25 17:44:13,208 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2021-03-25 17:44:13,208 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:13,209 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 151 transitions, 1387 flow [2021-03-25 17:44:13,209 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 151 transitions, 1387 flow [2021-03-25 17:44:13,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 151 transitions, 1387 flow [2021-03-25 17:44:13,384 INFO L129 PetriNetUnfolder]: 1131/2458 cut-off events. [2021-03-25 17:44:13,384 INFO L130 PetriNetUnfolder]: For 11290/12076 co-relation queries the response was YES. [2021-03-25 17:44:13,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13617 conditions, 2458 events. 1131/2458 cut-off events. For 11290/12076 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 21006 event pairs, 306 based on Foata normal form. 15/2324 useless extension candidates. Maximal degree in co-relation 10365. Up to 890 conditions per place. [2021-03-25 17:44:13,458 INFO L142 LiptonReduction]: Number of co-enabled transitions 930 [2021-03-25 17:44:13,637 INFO L154 LiptonReduction]: Checked pairs total: 2205 [2021-03-25 17:44:13,637 INFO L156 LiptonReduction]: Total number of compositions: 7 [2021-03-25 17:44:13,638 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 430 [2021-03-25 17:44:13,639 INFO L480 AbstractCegarLoop]: Abstraction has has 76 places, 151 transitions, 1395 flow [2021-03-25 17:44:13,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 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) [2021-03-25 17:44:13,640 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:13,640 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:44:13,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-03-25 17:44:13,855 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:13,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash 522428977, now seen corresponding path program 1 times [2021-03-25 17:44:13,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:13,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895683865] [2021-03-25 17:44:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:13,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:13,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:13,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:13,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:13,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:13,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:13,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895683865] [2021-03-25 17:44:13,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463905942] [2021-03-25 17:44:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-25 17:44:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 17:44:13,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:13,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:13,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:13,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:13,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:13,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:13,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:14,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:14,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:14,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:14,015 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:14,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:14,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:14,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:14,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:14,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:14,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:14,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:14,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:14,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:14,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:14,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:14,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:14,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,064 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:14,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:14,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 17:44:14,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-03-25 17:44:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126252020] [2021-03-25 17:44:14,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-25 17:44:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-25 17:44:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-25 17:44:14,075 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2021-03-25 17:44:14,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 151 transitions, 1395 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 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) [2021-03-25 17:44:14,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:14,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2021-03-25 17:44:14,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:15,251 INFO L129 PetriNetUnfolder]: 4982/8700 cut-off events. [2021-03-25 17:44:15,251 INFO L130 PetriNetUnfolder]: For 43953/43953 co-relation queries the response was YES. [2021-03-25 17:44:15,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49149 conditions, 8700 events. 4982/8700 cut-off events. For 43953/43953 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 66134 event pairs, 549 based on Foata normal form. 156/8856 useless extension candidates. Maximal degree in co-relation 38951. Up to 2672 conditions per place. [2021-03-25 17:44:15,331 INFO L132 encePairwiseOnDemand]: 17/39 looper letters, 152 selfloop transitions, 172 changer transitions 4/329 dead transitions. [2021-03-25 17:44:15,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 329 transitions, 3576 flow [2021-03-25 17:44:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-25 17:44:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-03-25 17:44:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 261 transitions. [2021-03-25 17:44:15,333 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3522267206477733 [2021-03-25 17:44:15,333 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 261 transitions. [2021-03-25 17:44:15,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 261 transitions. [2021-03-25 17:44:15,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:15,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 261 transitions. [2021-03-25 17:44:15,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 13.736842105263158) internal successors, (261), 19 states have internal predecessors, (261), 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) [2021-03-25 17:44:15,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 39.0) internal successors, (780), 20 states have internal predecessors, (780), 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) [2021-03-25 17:44:15,335 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 39.0) internal successors, (780), 20 states have internal predecessors, (780), 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) [2021-03-25 17:44:15,335 INFO L185 Difference]: Start difference. First operand has 76 places, 151 transitions, 1395 flow. Second operand 19 states and 261 transitions. [2021-03-25 17:44:15,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 329 transitions, 3576 flow [2021-03-25 17:44:15,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 329 transitions, 3564 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-25 17:44:15,725 INFO L241 Difference]: Finished difference. Result has 105 places, 215 transitions, 2670 flow [2021-03-25 17:44:15,726 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2670, PETRI_PLACES=105, PETRI_TRANSITIONS=215} [2021-03-25 17:44:15,726 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2021-03-25 17:44:15,726 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:15,726 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 215 transitions, 2670 flow [2021-03-25 17:44:15,726 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 215 transitions, 2670 flow [2021-03-25 17:44:15,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 105 places, 215 transitions, 2670 flow [2021-03-25 17:44:16,202 INFO L129 PetriNetUnfolder]: 1829/3977 cut-off events. [2021-03-25 17:44:16,203 INFO L130 PetriNetUnfolder]: For 47055/49362 co-relation queries the response was YES. [2021-03-25 17:44:16,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28512 conditions, 3977 events. 1829/3977 cut-off events. For 47055/49362 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 36792 event pairs, 587 based on Foata normal form. 78/3718 useless extension candidates. Maximal degree in co-relation 23705. Up to 1482 conditions per place. [2021-03-25 17:44:16,329 INFO L142 LiptonReduction]: Number of co-enabled transitions 1098 [2021-03-25 17:44:16,562 INFO L154 LiptonReduction]: Checked pairs total: 2065 [2021-03-25 17:44:16,562 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:44:16,562 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 836 [2021-03-25 17:44:16,563 INFO L480 AbstractCegarLoop]: Abstraction has has 105 places, 215 transitions, 2670 flow [2021-03-25 17:44:16,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 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) [2021-03-25 17:44:16,563 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:16,563 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:44:16,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:16,780 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash -345976544, now seen corresponding path program 1 times [2021-03-25 17:44:16,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:16,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977813630] [2021-03-25 17:44:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:16,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:16,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:16,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:16,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:16,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977813630] [2021-03-25 17:44:16,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419914449] [2021-03-25 17:44:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-25 17:44:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 17:44:16,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:16,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:16,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:16,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:16,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:16,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:16,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:16,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:16,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:16,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:16,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:16,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:16,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:16,909 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:16,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:16,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:16,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:16,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:16,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:16,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:16,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 17:44:16,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-03-25 17:44:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422422939] [2021-03-25 17:44:16,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-25 17:44:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-25 17:44:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-25 17:44:16,943 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2021-03-25 17:44:16,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 215 transitions, 2670 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2021-03-25 17:44:16,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:16,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2021-03-25 17:44:16,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:18,953 INFO L129 PetriNetUnfolder]: 7300/13031 cut-off events. [2021-03-25 17:44:18,953 INFO L130 PetriNetUnfolder]: For 120165/120165 co-relation queries the response was YES. [2021-03-25 17:44:19,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92385 conditions, 13031 events. 7300/13031 cut-off events. For 120165/120165 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 108937 event pairs, 1211 based on Foata normal form. 120/13151 useless extension candidates. Maximal degree in co-relation 73687. Up to 4547 conditions per place. [2021-03-25 17:44:19,197 INFO L132 encePairwiseOnDemand]: 19/39 looper letters, 220 selfloop transitions, 264 changer transitions 3/488 dead transitions. [2021-03-25 17:44:19,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 488 transitions, 6654 flow [2021-03-25 17:44:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-25 17:44:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-03-25 17:44:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 326 transitions. [2021-03-25 17:44:19,199 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3634336677814939 [2021-03-25 17:44:19,199 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 326 transitions. [2021-03-25 17:44:19,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 326 transitions. [2021-03-25 17:44:19,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:19,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 326 transitions. [2021-03-25 17:44:19,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 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) [2021-03-25 17:44:19,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 39.0) internal successors, (936), 24 states have internal predecessors, (936), 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) [2021-03-25 17:44:19,202 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 39.0) internal successors, (936), 24 states have internal predecessors, (936), 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) [2021-03-25 17:44:19,202 INFO L185 Difference]: Start difference. First operand has 105 places, 215 transitions, 2670 flow. Second operand 23 states and 326 transitions. [2021-03-25 17:44:19,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 488 transitions, 6654 flow [2021-03-25 17:44:20,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 488 transitions, 6550 flow, removed 38 selfloop flow, removed 4 redundant places. [2021-03-25 17:44:20,313 INFO L241 Difference]: Finished difference. Result has 133 places, 336 transitions, 5053 flow [2021-03-25 17:44:20,314 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5053, PETRI_PLACES=133, PETRI_TRANSITIONS=336} [2021-03-25 17:44:20,314 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 106 predicate places. [2021-03-25 17:44:20,314 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:20,314 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 336 transitions, 5053 flow [2021-03-25 17:44:20,314 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 336 transitions, 5053 flow [2021-03-25 17:44:20,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 133 places, 336 transitions, 5053 flow [2021-03-25 17:44:21,284 INFO L129 PetriNetUnfolder]: 2828/6304 cut-off events. [2021-03-25 17:44:21,284 INFO L130 PetriNetUnfolder]: For 109901/114766 co-relation queries the response was YES. [2021-03-25 17:44:21,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52882 conditions, 6304 events. 2828/6304 cut-off events. For 109901/114766 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 64472 event pairs, 919 based on Foata normal form. 116/5909 useless extension candidates. Maximal degree in co-relation 44000. Up to 2325 conditions per place. [2021-03-25 17:44:21,355 INFO L142 LiptonReduction]: Number of co-enabled transitions 1550 [2021-03-25 17:44:21,641 INFO L154 LiptonReduction]: Checked pairs total: 4386 [2021-03-25 17:44:21,641 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:44:21,641 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1327 [2021-03-25 17:44:21,642 INFO L480 AbstractCegarLoop]: Abstraction has has 133 places, 336 transitions, 5053 flow [2021-03-25 17:44:21,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2021-03-25 17:44:21,642 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:21,642 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-03-25 17:44:21,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:21,857 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1503691469, now seen corresponding path program 1 times [2021-03-25 17:44:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:21,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357268361] [2021-03-25 17:44:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:44:21,873 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:44:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:44:21,875 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:44:21,876 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:44:21,877 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:44:21,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-25 17:44:21,877 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-25 17:44:21,877 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-25 17:44:21,883 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,883 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,883 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,883 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,883 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,883 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,884 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,885 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,885 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,886 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,887 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,887 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,888 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:44:21,888 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:44:21,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-25 17:44:21,889 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:44:21,889 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:44:21,889 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:44:21,889 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:44:21,889 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:44:21,889 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:44:21,889 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:44:21,889 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:44:21,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 31 transitions, 94 flow [2021-03-25 17:44:21,893 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-03-25 17:44:21,893 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-25 17:44:21,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 46 events. 0/46 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-25 17:44:21,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 31 transitions, 94 flow [2021-03-25 17:44:21,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 31 transitions, 94 flow [2021-03-25 17:44:21,893 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:21,893 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 31 transitions, 94 flow [2021-03-25 17:44:21,894 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 31 transitions, 94 flow [2021-03-25 17:44:21,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 31 transitions, 94 flow [2021-03-25 17:44:21,895 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-03-25 17:44:21,895 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-25 17:44:21,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 46 events. 0/46 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-25 17:44:21,896 INFO L142 LiptonReduction]: Number of co-enabled transitions 560 [2021-03-25 17:44:21,981 INFO L154 LiptonReduction]: Checked pairs total: 1042 [2021-03-25 17:44:21,981 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 17:44:21,981 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 88 [2021-03-25 17:44:21,982 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 17:44:21,982 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 17:44:21,982 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:21,982 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 17:44:21,982 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1292472814, now seen corresponding path program 1 times [2021-03-25 17:44:21,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:21,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092689235] [2021-03-25 17:44:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:22,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:22,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:22,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:22,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:22,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:22,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:22,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:22,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092689235] [2021-03-25 17:44:22,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:44:22,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 17:44:22,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754451523] [2021-03-25 17:44:22,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 17:44:22,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:22,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 17:44:22,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-25 17:44:22,018 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 37 [2021-03-25 17:44:22,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2021-03-25 17:44:22,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:22,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 37 [2021-03-25 17:44:22,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:23,324 INFO L129 PetriNetUnfolder]: 19675/28437 cut-off events. [2021-03-25 17:44:23,324 INFO L130 PetriNetUnfolder]: For 3059/3059 co-relation queries the response was YES. [2021-03-25 17:44:23,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58465 conditions, 28437 events. 19675/28437 cut-off events. For 3059/3059 co-relation queries the response was YES. Maximal size of possible extension queue 1328. Compared 182692 event pairs, 3485 based on Foata normal form. 0/22411 useless extension candidates. Maximal degree in co-relation 32176. Up to 8501 conditions per place. [2021-03-25 17:44:23,447 INFO L132 encePairwiseOnDemand]: 21/37 looper letters, 91 selfloop transitions, 36 changer transitions 1/129 dead transitions. [2021-03-25 17:44:23,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 129 transitions, 636 flow [2021-03-25 17:44:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-25 17:44:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-25 17:44:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2021-03-25 17:44:23,449 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5513513513513514 [2021-03-25 17:44:23,449 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 204 transitions. [2021-03-25 17:44:23,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 204 transitions. [2021-03-25 17:44:23,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:23,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 204 transitions. [2021-03-25 17:44:23,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 20.4) internal successors, (204), 10 states have internal predecessors, (204), 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) [2021-03-25 17:44:23,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 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) [2021-03-25 17:44:23,450 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 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) [2021-03-25 17:44:23,450 INFO L185 Difference]: Start difference. First operand has 34 places, 25 transitions, 82 flow. Second operand 10 states and 204 transitions. [2021-03-25 17:44:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 129 transitions, 636 flow [2021-03-25 17:44:23,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 129 transitions, 594 flow, removed 21 selfloop flow, removed 0 redundant places. [2021-03-25 17:44:23,452 INFO L241 Difference]: Finished difference. Result has 51 places, 64 transitions, 359 flow [2021-03-25 17:44:23,452 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=359, PETRI_PLACES=51, PETRI_TRANSITIONS=64} [2021-03-25 17:44:23,452 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2021-03-25 17:44:23,452 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:23,452 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 64 transitions, 359 flow [2021-03-25 17:44:23,452 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 64 transitions, 359 flow [2021-03-25 17:44:23,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 64 transitions, 359 flow [2021-03-25 17:44:23,748 INFO L129 PetriNetUnfolder]: 3059/5239 cut-off events. [2021-03-25 17:44:23,749 INFO L130 PetriNetUnfolder]: For 5109/6654 co-relation queries the response was YES. [2021-03-25 17:44:23,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17422 conditions, 5239 events. 3059/5239 cut-off events. For 5109/6654 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 39979 event pairs, 951 based on Foata normal form. 4/4730 useless extension candidates. Maximal degree in co-relation 17379. Up to 2016 conditions per place. [2021-03-25 17:44:23,793 INFO L142 LiptonReduction]: Number of co-enabled transitions 758 [2021-03-25 17:44:23,896 INFO L154 LiptonReduction]: Checked pairs total: 649 [2021-03-25 17:44:23,896 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 17:44:23,896 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 444 [2021-03-25 17:44:23,897 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 63 transitions, 356 flow [2021-03-25 17:44:23,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2021-03-25 17:44:23,897 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:23,897 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:44:23,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-25 17:44:23,897 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash -710572175, now seen corresponding path program 1 times [2021-03-25 17:44:23,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:23,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235375647] [2021-03-25 17:44:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:23,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:23,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:23,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:23,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-25 17:44:23,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235375647] [2021-03-25 17:44:23,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368093872] [2021-03-25 17:44:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-25 17:44:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 17:44:23,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:23,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:23,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:23,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:23,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:23,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:23,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:23,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:23,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:23,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:23,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:23,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:23,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:23,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:23,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:23,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:23,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:23,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:23,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:24,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 17:44:24,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-03-25 17:44:24,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365899148] [2021-03-25 17:44:24,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-25 17:44:24,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-25 17:44:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-25 17:44:24,003 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2021-03-25 17:44:24,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 63 transitions, 356 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2021-03-25 17:44:24,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:24,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2021-03-25 17:44:24,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:30,377 INFO L129 PetriNetUnfolder]: 43769/65621 cut-off events. [2021-03-25 17:44:30,377 INFO L130 PetriNetUnfolder]: For 91443/91443 co-relation queries the response was YES. [2021-03-25 17:44:30,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242274 conditions, 65621 events. 43769/65621 cut-off events. For 91443/91443 co-relation queries the response was YES. Maximal size of possible extension queue 3583. Compared 508897 event pairs, 7007 based on Foata normal form. 2754/68375 useless extension candidates. Maximal degree in co-relation 196650. Up to 17012 conditions per place. [2021-03-25 17:44:30,947 INFO L132 encePairwiseOnDemand]: 21/39 looper letters, 222 selfloop transitions, 164 changer transitions 2/389 dead transitions. [2021-03-25 17:44:30,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 389 transitions, 2841 flow [2021-03-25 17:44:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-25 17:44:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-03-25 17:44:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 387 transitions. [2021-03-25 17:44:30,949 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.49615384615384617 [2021-03-25 17:44:30,949 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 387 transitions. [2021-03-25 17:44:30,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 387 transitions. [2021-03-25 17:44:30,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:30,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 387 transitions. [2021-03-25 17:44:30,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 19.35) internal successors, (387), 20 states have internal predecessors, (387), 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) [2021-03-25 17:44:30,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 39.0) internal successors, (819), 21 states have internal predecessors, (819), 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) [2021-03-25 17:44:30,951 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 39.0) internal successors, (819), 21 states have internal predecessors, (819), 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) [2021-03-25 17:44:30,951 INFO L185 Difference]: Start difference. First operand has 50 places, 63 transitions, 356 flow. Second operand 20 states and 387 transitions. [2021-03-25 17:44:30,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 389 transitions, 2841 flow [2021-03-25 17:44:34,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 389 transitions, 2807 flow, removed 17 selfloop flow, removed 1 redundant places. [2021-03-25 17:44:34,050 INFO L241 Difference]: Finished difference. Result has 83 places, 218 transitions, 2000 flow [2021-03-25 17:44:34,050 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2000, PETRI_PLACES=83, PETRI_TRANSITIONS=218} [2021-03-25 17:44:34,050 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2021-03-25 17:44:34,050 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:44:34,050 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 218 transitions, 2000 flow [2021-03-25 17:44:34,051 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 218 transitions, 2000 flow [2021-03-25 17:44:34,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 218 transitions, 2000 flow [2021-03-25 17:44:35,469 INFO L129 PetriNetUnfolder]: 9722/16656 cut-off events. [2021-03-25 17:44:35,469 INFO L130 PetriNetUnfolder]: For 68429/80217 co-relation queries the response was YES. [2021-03-25 17:44:35,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91579 conditions, 16656 events. 9722/16656 cut-off events. For 68429/80217 co-relation queries the response was YES. Maximal size of possible extension queue 1698. Compared 148626 event pairs, 2107 based on Foata normal form. 50/15590 useless extension candidates. Maximal degree in co-relation 78375. Up to 5801 conditions per place. [2021-03-25 17:44:35,781 INFO L142 LiptonReduction]: Number of co-enabled transitions 2012 [2021-03-25 17:44:38,827 INFO L154 LiptonReduction]: Checked pairs total: 11250 [2021-03-25 17:44:38,828 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-25 17:44:38,828 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4778 [2021-03-25 17:44:38,828 INFO L480 AbstractCegarLoop]: Abstraction has has 83 places, 218 transitions, 2007 flow [2021-03-25 17:44:38,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2021-03-25 17:44:38,828 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:44:38,828 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:44:39,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:39,040 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:44:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:44:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1792758467, now seen corresponding path program 1 times [2021-03-25 17:44:39,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:44:39,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132334254] [2021-03-25 17:44:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:44:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:39,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:39,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:39,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:39,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:39,069 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:44:39,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:44:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132334254] [2021-03-25 17:44:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704175164] [2021-03-25 17:44:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:44:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:44:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-25 17:44:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 17:44:39,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:39,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:39,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:44:39,174 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:39,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:39,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:39,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:39,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:39,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:39,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:44:39,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:39,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:44:39,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:44:39,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:44:39,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:44:39,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:44:39,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:44:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:44:39,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 17:44:39,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-03-25 17:44:39,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238453154] [2021-03-25 17:44:39,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-25 17:44:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:44:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-25 17:44:39,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-25 17:44:39,271 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 45 [2021-03-25 17:44:39,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 218 transitions, 2007 flow. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 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) [2021-03-25 17:44:39,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:44:39,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 45 [2021-03-25 17:44:39,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:44:49,379 INFO L129 PetriNetUnfolder]: 50284/75645 cut-off events. [2021-03-25 17:44:49,380 INFO L130 PetriNetUnfolder]: For 338791/338791 co-relation queries the response was YES. [2021-03-25 17:44:49,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 419044 conditions, 75645 events. 50284/75645 cut-off events. For 338791/338791 co-relation queries the response was YES. Maximal size of possible extension queue 4073. Compared 598603 event pairs, 6210 based on Foata normal form. 846/76491 useless extension candidates. Maximal degree in co-relation 335091. Up to 21350 conditions per place. [2021-03-25 17:44:50,276 INFO L132 encePairwiseOnDemand]: 21/45 looper letters, 212 selfloop transitions, 279 changer transitions 4/496 dead transitions. [2021-03-25 17:44:50,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 496 transitions, 5304 flow [2021-03-25 17:44:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-25 17:44:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-03-25 17:44:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 338 transitions. [2021-03-25 17:44:50,282 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3953216374269006 [2021-03-25 17:44:50,282 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 338 transitions. [2021-03-25 17:44:50,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 338 transitions. [2021-03-25 17:44:50,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:44:50,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 338 transitions. [2021-03-25 17:44:50,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 17.789473684210527) internal successors, (338), 19 states have internal predecessors, (338), 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) [2021-03-25 17:44:50,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 45.0) internal successors, (900), 20 states have internal predecessors, (900), 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) [2021-03-25 17:44:50,288 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 45.0) internal successors, (900), 20 states have internal predecessors, (900), 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) [2021-03-25 17:44:50,304 INFO L185 Difference]: Start difference. First operand has 83 places, 218 transitions, 2007 flow. Second operand 19 states and 338 transitions. [2021-03-25 17:44:50,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 496 transitions, 5304 flow [2021-03-25 17:45:04,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 496 transitions, 5288 flow, removed 8 selfloop flow, removed 0 redundant places. [2021-03-25 17:45:04,908 INFO L241 Difference]: Finished difference. Result has 112 places, 344 transitions, 4257 flow [2021-03-25 17:45:04,908 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4257, PETRI_PLACES=112, PETRI_TRANSITIONS=344} [2021-03-25 17:45:04,908 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 78 predicate places. [2021-03-25 17:45:04,913 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:45:04,921 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 344 transitions, 4257 flow [2021-03-25 17:45:04,921 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 344 transitions, 4257 flow [2021-03-25 17:45:04,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 344 transitions, 4257 flow [2021-03-25 17:45:07,706 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([146] L19-->threadErr0ASSERT_VIOLATIONASSERT: Formula: (not (<= v_x_4 v_n_3)) InVars {x=v_x_4, n=v_n_3} OutVars{x=v_x_4, n=v_n_3} AuxVars[] AssignedVars[][132], [Black: 55#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n)), Black: 57#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 59#(and (<= x n) (<= x ULTIMATE.start_i)), 69#true, 6#L29-1true, Black: 129#(and (<= x n) (<= threadThread2of4ForFork0_t 0) (< 1 n)), Black: 131#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 99#(and (<= threadThread2of4ForFork0_t 0) (< 1 n)), 10#threadErr0ASSERT_VIOLATIONASSERTtrue, 11#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 73#(<= (+ threadThread2of4ForFork0_t 1) n), Black: 105#(and (<= 0 ULTIMATE.start_i) (<= x 0) (<= (+ x 1) n)), Black: 74#(<= x n), 13#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 107#(and (<= x 0) (<= (+ x 1) n) (<= 1 ULTIMATE.start_i)), Black: 109#(and (<= x 0) (< 1 n) (<= 1 ULTIMATE.start_i)), Black: 111#(and (<= x n) (<= x ULTIMATE.start_i)), 16#L19true, Black: 113#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 115#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 121#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 125#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n)), Black: 127#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1)), 150#true, Black: 208#(and (<= x n) (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 210#(and (<= (+ x 1) n) (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 196#(and (<= x n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 182#(and (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 214#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n)), Black: 198#(and (< 1 n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 204#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (<= x (+ ULTIMATE.start_i 1)) (< 1 n)), Black: 156#(<= x n), Black: 206#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 190#(and (<= 0 ULTIMATE.start_i) (<= x n) (<= x 1)), threadThread1of4ForFork0InUse, threadThread2of4ForFork0InUse, threadThread3of4ForFork0InUse, threadThread4of4ForFork0InUse, 44#true, Black: 48#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 49#(<= x n), Black: 51#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i))]) [2021-03-25 17:45:07,706 INFO L384 tUnfolder$Statistics]: this new event has 22 ancestors and is not cut-off event [2021-03-25 17:45:07,706 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is not cut-off event [2021-03-25 17:45:07,706 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is not cut-off event [2021-03-25 17:45:07,706 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is not cut-off event [2021-03-25 17:45:07,712 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([146] L19-->threadErr0ASSERT_VIOLATIONASSERT: Formula: (not (<= v_x_4 v_n_3)) InVars {x=v_x_4, n=v_n_3} OutVars{x=v_x_4, n=v_n_3} AuxVars[] AssignedVars[][132], [Black: 55#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n)), Black: 57#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 59#(and (<= x n) (<= x ULTIMATE.start_i)), 69#true, 6#L29-1true, Black: 129#(and (<= x n) (<= threadThread2of4ForFork0_t 0) (< 1 n)), Black: 131#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 99#(and (<= threadThread2of4ForFork0_t 0) (< 1 n)), 10#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 73#(<= (+ threadThread2of4ForFork0_t 1) n), 11#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 105#(and (<= 0 ULTIMATE.start_i) (<= x 0) (<= (+ x 1) n)), Black: 74#(<= x n), 13#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 107#(and (<= x 0) (<= (+ x 1) n) (<= 1 ULTIMATE.start_i)), Black: 109#(and (<= x 0) (< 1 n) (<= 1 ULTIMATE.start_i)), Black: 111#(and (<= x n) (<= x ULTIMATE.start_i)), Black: 113#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 115#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 121#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 125#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n)), Black: 127#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1)), 150#true, Black: 208#(and (<= x n) (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 210#(and (<= (+ x 1) n) (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 196#(and (<= x n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 182#(and (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 214#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n)), Black: 198#(and (< 1 n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 204#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (<= x (+ ULTIMATE.start_i 1)) (< 1 n)), Black: 156#(<= x n), 34#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 206#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 190#(and (<= 0 ULTIMATE.start_i) (<= x n) (<= x 1)), threadThread1of4ForFork0InUse, threadThread2of4ForFork0InUse, threadThread3of4ForFork0InUse, threadThread4of4ForFork0InUse, 44#true, Black: 48#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 49#(<= x n), Black: 51#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i))]) [2021-03-25 17:45:07,712 INFO L384 tUnfolder$Statistics]: this new event has 23 ancestors and is cut-off event [2021-03-25 17:45:07,713 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:45:07,713 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:45:07,713 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:45:07,719 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([146] L19-->threadErr0ASSERT_VIOLATIONASSERT: Formula: (not (<= v_x_4 v_n_3)) InVars {x=v_x_4, n=v_n_3} OutVars{x=v_x_4, n=v_n_3} AuxVars[] AssignedVars[][132], [Black: 55#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n)), Black: 57#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 59#(and (<= x n) (<= x ULTIMATE.start_i)), Black: 44#true, 69#true, 6#L29-1true, Black: 129#(and (<= x n) (<= threadThread2of4ForFork0_t 0) (< 1 n)), Black: 131#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 99#(and (<= threadThread2of4ForFork0_t 0) (< 1 n)), 10#threadErr0ASSERT_VIOLATIONASSERTtrue, 11#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 73#(<= (+ threadThread2of4ForFork0_t 1) n), Black: 105#(and (<= 0 ULTIMATE.start_i) (<= x 0) (<= (+ x 1) n)), Black: 74#(<= x n), 13#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 107#(and (<= x 0) (<= (+ x 1) n) (<= 1 ULTIMATE.start_i)), Black: 109#(and (<= x 0) (< 1 n) (<= 1 ULTIMATE.start_i)), Black: 111#(and (<= x n) (<= x ULTIMATE.start_i)), Black: 113#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 115#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 121#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 125#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n)), Black: 127#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1)), 150#true, Black: 208#(and (<= x n) (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 210#(and (<= (+ x 1) n) (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 196#(and (<= x n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 182#(and (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 214#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n)), Black: 198#(and (< 1 n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 204#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (<= x (+ ULTIMATE.start_i 1)) (< 1 n)), Black: 156#(<= x n), 34#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 206#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 190#(and (<= 0 ULTIMATE.start_i) (<= x n) (<= x 1)), threadThread1of4ForFork0InUse, threadThread2of4ForFork0InUse, threadThread3of4ForFork0InUse, threadThread4of4ForFork0InUse, 48#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 49#(<= x n), Black: 51#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i))]) [2021-03-25 17:45:07,719 INFO L384 tUnfolder$Statistics]: this new event has 23 ancestors and is cut-off event [2021-03-25 17:45:07,719 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:45:07,719 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:45:07,719 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:45:08,353 INFO L129 PetriNetUnfolder]: 16225/28141 cut-off events. [2021-03-25 17:45:08,353 INFO L130 PetriNetUnfolder]: For 316485/341611 co-relation queries the response was YES. [2021-03-25 17:45:08,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202551 conditions, 28141 events. 16225/28141 cut-off events. For 316485/341611 co-relation queries the response was YES. Maximal size of possible extension queue 3036. Compared 271194 event pairs, 5946 based on Foata normal form. 445/25734 useless extension candidates. Maximal degree in co-relation 171673. Up to 10749 conditions per place. [2021-03-25 17:45:08,814 INFO L142 LiptonReduction]: Number of co-enabled transitions 2672 [2021-03-25 17:48:41,929 INFO L154 LiptonReduction]: Checked pairs total: 37958 [2021-03-25 17:48:41,929 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 17:48:41,930 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 217017 [2021-03-25 17:48:41,930 INFO L480 AbstractCegarLoop]: Abstraction has has 112 places, 344 transitions, 4259 flow [2021-03-25 17:48:41,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 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) [2021-03-25 17:48:41,930 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:48:41,930 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:48:42,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-25 17:48:42,132 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:48:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:48:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1247098001, now seen corresponding path program 1 times [2021-03-25 17:48:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:48:42,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314600759] [2021-03-25 17:48:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:48:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:48:42,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:48:42,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:48:42,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:48:42,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 17:48:42,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:48:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:48:42,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314600759] [2021-03-25 17:48:42,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109588488] [2021-03-25 17:48:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 17:48:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:48:42,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-25 17:48:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 17:48:42,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,281 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:48:42,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:48:42,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:48:42,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:48:42,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:48:42,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:48:42,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:48:42,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:48:42,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:48:42,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:48:42,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-25 17:48:42,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 17:48:42,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:48:42,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:48:42,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-25 17:48:42,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 17:48:42,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 17:48:42,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-25 17:48:42,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:48:42,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:48:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:48:42,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 17:48:42,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-03-25 17:48:42,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097806702] [2021-03-25 17:48:42,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-25 17:48:42,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:48:42,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-25 17:48:42,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-25 17:48:42,336 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 46 [2021-03-25 17:48:42,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 344 transitions, 4259 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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) [2021-03-25 17:48:42,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:48:42,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 46 [2021-03-25 17:48:42,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:49:03,579 INFO L129 PetriNetUnfolder]: 79359/120804 cut-off events. [2021-03-25 17:49:03,579 INFO L130 PetriNetUnfolder]: For 1037574/1037574 co-relation queries the response was YES. [2021-03-25 17:49:04,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 830268 conditions, 120804 events. 79359/120804 cut-off events. For 1037574/1037574 co-relation queries the response was YES. Maximal size of possible extension queue 6849. Compared 1040262 event pairs, 13717 based on Foata normal form. 750/121554 useless extension candidates. Maximal degree in co-relation 651889. Up to 37915 conditions per place. [2021-03-25 17:49:05,535 INFO L132 encePairwiseOnDemand]: 23/46 looper letters, 326 selfloop transitions, 438 changer transitions 3/768 dead transitions. [2021-03-25 17:49:05,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 768 transitions, 10366 flow [2021-03-25 17:49:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-25 17:49:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-03-25 17:49:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 424 transitions. [2021-03-25 17:49:05,538 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.4007561436672968 [2021-03-25 17:49:05,538 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 424 transitions. [2021-03-25 17:49:05,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 424 transitions. [2021-03-25 17:49:05,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:49:05,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 424 transitions. [2021-03-25 17:49:05,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 18.434782608695652) internal successors, (424), 23 states have internal predecessors, (424), 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) [2021-03-25 17:49:05,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 46.0) internal successors, (1104), 24 states have internal predecessors, (1104), 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) [2021-03-25 17:49:05,542 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 46.0) internal successors, (1104), 24 states have internal predecessors, (1104), 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) [2021-03-25 17:49:05,542 INFO L185 Difference]: Start difference. First operand has 112 places, 344 transitions, 4259 flow. Second operand 23 states and 424 transitions. [2021-03-25 17:49:05,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 768 transitions, 10366 flow [2021-03-25 17:51:44,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 768 transitions, 10256 flow, removed 38 selfloop flow, removed 4 redundant places. [2021-03-25 17:51:44,270 INFO L241 Difference]: Finished difference. Result has 140 places, 550 transitions, 8328 flow [2021-03-25 17:51:44,271 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8328, PETRI_PLACES=140, PETRI_TRANSITIONS=550} [2021-03-25 17:51:44,271 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 106 predicate places. [2021-03-25 17:51:44,271 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:51:44,271 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 550 transitions, 8328 flow [2021-03-25 17:51:44,271 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 550 transitions, 8328 flow [2021-03-25 17:51:44,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 550 transitions, 8328 flow [2021-03-25 17:51:49,844 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([146] L19-->threadErr0ASSERT_VIOLATIONASSERT: Formula: (not (<= v_x_4 v_n_3)) InVars {x=v_x_4, n=v_n_3} OutVars{x=v_x_4, n=v_n_3} AuxVars[] AssignedVars[][258], [6#L29-1true, Black: 129#(and (<= x n) (<= threadThread2of4ForFork0_t 0) (< 1 n)), Black: 131#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 99#(and (<= threadThread2of4ForFork0_t 0) (< 1 n)), 10#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 73#(<= (+ threadThread2of4ForFork0_t 1) n), 11#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 105#(and (<= 0 ULTIMATE.start_i) (<= x 0) (<= (+ x 1) n)), Black: 74#(<= x n), 13#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 107#(and (<= x 0) (<= (+ x 1) n) (<= 1 ULTIMATE.start_i)), Black: 109#(and (<= x 0) (< 1 n) (<= 1 ULTIMATE.start_i)), Black: 111#(and (<= x n) (<= x ULTIMATE.start_i)), 16#L19true, Black: 113#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 115#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 121#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 125#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n)), Black: 127#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1)), 150#true, threadThread1of4ForFork0InUse, threadThread2of4ForFork0InUse, threadThread3of4ForFork0InUse, Black: 289#(and (<= x n) (< 1 n) (<= threadThread1of4ForFork0_t 1)), Black: 257#(and (< 1 n) (<= threadThread1of4ForFork0_t 1)), threadThread4of4ForFork0InUse, 44#true, Black: 279#(and (<= x 2) (< 1 n) (<= threadThread1of4ForFork0_t 1)), Black: 281#(and (<= (+ threadThread1of4ForFork0_t 1) n) (< 1 n) (<= x 1)), Black: 234#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 253#(and (< 1 n) (<= x 1)), Black: 285#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 287#(and (<= x 2) (< 1 n) (<= threadThread1of4ForFork0_t 1) (<= x ULTIMATE.start_i)), Black: 271#(and (< 1 n) (<= x 1) (<= threadThread1of4ForFork0_t 1)), Black: 48#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 49#(<= x n), Black: 51#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 55#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n)), Black: 57#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 59#(and (<= x n) (<= x ULTIMATE.start_i)), 69#true, Black: 208#(and (<= x n) (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 210#(and (<= (+ x 1) n) (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 196#(and (<= x n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 182#(and (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 214#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n)), Black: 198#(and (< 1 n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 204#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (<= x (+ ULTIMATE.start_i 1)) (< 1 n)), Black: 156#(<= x n), Black: 206#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 190#(and (<= 0 ULTIMATE.start_i) (<= x n) (<= x 1)), 229#true]) [2021-03-25 17:51:49,844 INFO L384 tUnfolder$Statistics]: this new event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,844 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,844 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,844 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,845 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([146] L19-->threadErr0ASSERT_VIOLATIONASSERT: Formula: (not (<= v_x_4 v_n_3)) InVars {x=v_x_4, n=v_n_3} OutVars{x=v_x_4, n=v_n_3} AuxVars[] AssignedVars[][258], [6#L29-1true, Black: 129#(and (<= x n) (<= threadThread2of4ForFork0_t 0) (< 1 n)), Black: 131#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), 8#L19true, Black: 99#(and (<= threadThread2of4ForFork0_t 0) (< 1 n)), 11#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 73#(<= (+ threadThread2of4ForFork0_t 1) n), Black: 105#(and (<= 0 ULTIMATE.start_i) (<= x 0) (<= (+ x 1) n)), Black: 74#(<= x n), 13#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 107#(and (<= x 0) (<= (+ x 1) n) (<= 1 ULTIMATE.start_i)), Black: 109#(and (<= x 0) (< 1 n) (<= 1 ULTIMATE.start_i)), Black: 111#(and (<= x n) (<= x ULTIMATE.start_i)), Black: 113#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 115#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 121#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 125#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n)), Black: 127#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1)), 150#true, 34#threadErr0ASSERT_VIOLATIONASSERTtrue, threadThread1of4ForFork0InUse, threadThread2of4ForFork0InUse, threadThread3of4ForFork0InUse, Black: 289#(and (<= x n) (< 1 n) (<= threadThread1of4ForFork0_t 1)), Black: 257#(and (< 1 n) (<= threadThread1of4ForFork0_t 1)), threadThread4of4ForFork0InUse, Black: 279#(and (<= x 2) (< 1 n) (<= threadThread1of4ForFork0_t 1)), 44#true, Black: 281#(and (<= (+ threadThread1of4ForFork0_t 1) n) (< 1 n) (<= x 1)), Black: 234#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 253#(and (< 1 n) (<= x 1)), Black: 285#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 287#(and (<= x 2) (< 1 n) (<= threadThread1of4ForFork0_t 1) (<= x ULTIMATE.start_i)), Black: 271#(and (< 1 n) (<= x 1) (<= threadThread1of4ForFork0_t 1)), Black: 48#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 49#(<= x n), Black: 51#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 55#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n)), Black: 57#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 59#(and (<= x n) (<= x ULTIMATE.start_i)), 69#true, Black: 208#(and (<= x n) (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 210#(and (<= (+ x 1) n) (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 196#(and (<= x n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 182#(and (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 214#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n)), Black: 198#(and (< 1 n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 204#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (<= x (+ ULTIMATE.start_i 1)) (< 1 n)), Black: 156#(<= x n), Black: 206#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 190#(and (<= 0 ULTIMATE.start_i) (<= x n) (<= x 1)), 229#true]) [2021-03-25 17:51:49,845 INFO L384 tUnfolder$Statistics]: this new event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,845 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,845 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:51:49,845 INFO L387 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2021-03-25 17:51:51,380 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([146] L19-->threadErr0ASSERT_VIOLATIONASSERT: Formula: (not (<= v_x_4 v_n_3)) InVars {x=v_x_4, n=v_n_3} OutVars{x=v_x_4, n=v_n_3} AuxVars[] AssignedVars[][258], [6#L29-1true, Black: 129#(and (<= x n) (<= threadThread2of4ForFork0_t 0) (< 1 n)), Black: 131#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 99#(and (<= threadThread2of4ForFork0_t 0) (< 1 n)), 10#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 73#(<= (+ threadThread2of4ForFork0_t 1) n), 11#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 105#(and (<= 0 ULTIMATE.start_i) (<= x 0) (<= (+ x 1) n)), Black: 74#(<= x n), 13#threadErr0ASSERT_VIOLATIONASSERTtrue, Black: 107#(and (<= x 0) (<= (+ x 1) n) (<= 1 ULTIMATE.start_i)), Black: 109#(and (<= x 0) (< 1 n) (<= 1 ULTIMATE.start_i)), Black: 111#(and (<= x n) (<= x ULTIMATE.start_i)), Black: 113#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 115#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 121#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 125#(and (<= x n) (<= (+ threadThread2of4ForFork0_t 1) n)), Black: 127#(and (<= threadThread2of4ForFork0_t 0) (< 1 n) (<= x 1)), 150#true, 34#threadErr0ASSERT_VIOLATIONASSERTtrue, threadThread1of4ForFork0InUse, threadThread2of4ForFork0InUse, threadThread3of4ForFork0InUse, Black: 289#(and (<= x n) (< 1 n) (<= threadThread1of4ForFork0_t 1)), Black: 257#(and (< 1 n) (<= threadThread1of4ForFork0_t 1)), threadThread4of4ForFork0InUse, 44#true, Black: 279#(and (<= x 2) (< 1 n) (<= threadThread1of4ForFork0_t 1)), Black: 281#(and (<= (+ threadThread1of4ForFork0_t 1) n) (< 1 n) (<= x 1)), Black: 234#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 253#(and (< 1 n) (<= x 1)), Black: 285#(and (< 1 n) (<= x 1) (<= x ULTIMATE.start_i)), Black: 287#(and (<= x 2) (< 1 n) (<= threadThread1of4ForFork0_t 1) (<= x ULTIMATE.start_i)), Black: 271#(and (< 1 n) (<= x 1) (<= threadThread1of4ForFork0_t 1)), Black: 48#(<= (+ threadThread1of4ForFork0_t 1) n), Black: 49#(<= x n), Black: 51#(and (<= (+ x 1) n) (<= x ULTIMATE.start_i)), Black: 55#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n)), Black: 57#(and (<= x n) (<= (+ threadThread1of4ForFork0_t 1) n) (<= x ULTIMATE.start_i)), Black: 59#(and (<= x n) (<= x ULTIMATE.start_i)), 69#true, Black: 208#(and (<= x n) (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 210#(and (<= (+ x 1) n) (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 196#(and (<= x n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 182#(and (<= threadThread2of4ForFork0_t 1) (< 1 n)), Black: 214#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n)), Black: 198#(and (< 1 n) (<= 1 ULTIMATE.start_i) (<= x 1)), Black: 204#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (<= x (+ ULTIMATE.start_i 1)) (< 1 n)), Black: 156#(<= x n), Black: 206#(and (<= threadThread2of4ForFork0_t 1) (<= x 2) (< 1 n) (<= x ULTIMATE.start_i)), Black: 190#(and (<= 0 ULTIMATE.start_i) (<= x n) (<= x 1)), 229#true]) [2021-03-25 17:51:51,381 INFO L384 tUnfolder$Statistics]: this new event has 23 ancestors and is cut-off event [2021-03-25 17:51:51,381 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:51:51,381 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:51:51,381 INFO L387 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2021-03-25 17:51:52,121 INFO L129 PetriNetUnfolder]: 26620/47184 cut-off events. [2021-03-25 17:51:52,122 INFO L130 PetriNetUnfolder]: For 721769/759249 co-relation queries the response was YES. [2021-03-25 17:51:52,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 399298 conditions, 47184 events. 26620/47184 cut-off events. For 721769/759249 co-relation queries the response was YES. Maximal size of possible extension queue 5107. Compared 495629 event pairs, 8478 based on Foata normal form. 448/43673 useless extension candidates. Maximal degree in co-relation 332138. Up to 17711 conditions per place. [2021-03-25 17:51:53,317 INFO L142 LiptonReduction]: Number of co-enabled transitions 3916 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown