/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 00:17:42,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 00:17:42,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 00:17:42,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-12 00:17:42,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-12 00:17:42,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-12 00:17:42,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-12 00:17:42,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-12 00:17:42,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-12 00:17:42,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-12 00:17:42,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-12 00:17:42,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-03-12 00:17:42,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-12 00:17:42,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 00:17:42,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 00:17:42,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 00:17:42,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 00:17:42,844 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 00:17:42,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 00:17:42,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 00:17:42,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 00:17:42,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 00:17:42,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 00:17:42,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 00:17:42,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 00:17:42,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 00:17:42,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 00:17:42,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 00:17:42,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 00:17:42,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 00:17:42,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 00:17:42,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 00:17:42,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 00:17:42,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 00:17:42,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:17:42,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 00:17:42,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 00:17:42,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 00:17:42,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 00:17:42,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 00:17:42,848 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-12 00:17:42,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 00:17:43,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 00:17:43,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 00:17:43,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 00:17:43,162 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 00:17:43,163 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 00:17:43,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-1.wvr.bpl [2021-03-12 00:17:43,164 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-1.wvr.bpl' [2021-03-12 00:17:43,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 00:17:43,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 00:17:43,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 00:17:43,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 00:17:43,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 00:17:43,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 00:17:43,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 00:17:43,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 00:17:43,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 00:17:43,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/1) ... [2021-03-12 00:17:43,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 00:17:43,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 00:17:43,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 00:17:43,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 00:17:43,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (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 [2021-03-12 00:17:43,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-12 00:17:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-12 00:17:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-12 00:17:43,368 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-12 00:17:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-12 00:17:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-12 00:17:43,368 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-12 00:17:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 00:17:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 00:17:43,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-12 00:17:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-12 00:17:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-12 00:17:43,370 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 00:17:43,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 00:17:43,583 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 00:17:43,584 INFO L202 PluginConnector]: Adding new model min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:17:43 BoogieIcfgContainer [2021-03-12 00:17:43,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 00:17:43,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 00:17:43,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 00:17:43,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 00:17:43,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:43" (1/2) ... [2021-03-12 00:17:43,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719dc9ed and model type min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 12:17:43, skipping insertion in model container [2021-03-12 00:17:43,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:17:43" (2/2) ... [2021-03-12 00:17:43,590 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-1.wvr.bpl [2021-03-12 00:17:43,594 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 00:17:43,597 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 00:17:43,598 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 00:17:43,626 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-12 00:17:43,642 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-12 00:17:43,676 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 00:17:43,676 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-12 00:17:43,676 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 00:17:43,676 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 00:17:43,676 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 00:17:43,676 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 00:17:43,677 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 00:17:43,677 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 00:17:43,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 30 transitions, 84 flow [2021-03-12 00:17:43,717 INFO L129 PetriNetUnfolder]: 2/27 cut-off events. [2021-03-12 00:17:43,718 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:17:43,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 2/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-03-12 00:17:43,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 30 transitions, 84 flow [2021-03-12 00:17:43,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 25 transitions, 68 flow [2021-03-12 00:17:43,727 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-12 00:17:43,736 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 25 transitions, 68 flow [2021-03-12 00:17:43,738 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 25 transitions, 68 flow [2021-03-12 00:17:43,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 33 places, 25 transitions, 68 flow [2021-03-12 00:17:43,748 INFO L129 PetriNetUnfolder]: 2/25 cut-off events. [2021-03-12 00:17:43,748 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:17:43,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 2/25 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-03-12 00:17:43,749 INFO L116 LiptonReduction]: Number of co-enabled transitions 218 [2021-03-12 00:17:44,133 INFO L131 LiptonReduction]: Checked pairs total: 289 [2021-03-12 00:17:44,134 INFO L133 LiptonReduction]: Total number of compositions: 8 [2021-03-12 00:17:44,135 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 411 [2021-03-12 00:17:44,158 INFO L129 PetriNetUnfolder]: 2/16 cut-off events. [2021-03-12 00:17:44,159 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:17:44,159 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:44,160 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:17:44,160 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1885392364, now seen corresponding path program 1 times [2021-03-12 00:17:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:44,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375294809] [2021-03-12 00:17:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:44,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:44,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:44,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375294809] [2021-03-12 00:17:44,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:44,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-12 00:17:44,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367896992] [2021-03-12 00:17:44,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-12 00:17:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:44,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-12 00:17:44,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-12 00:17:44,321 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 38 [2021-03-12 00:17:44,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-03-12 00:17:44,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:44,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 38 [2021-03-12 00:17:44,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:44,372 INFO L129 PetriNetUnfolder]: 32/88 cut-off events. [2021-03-12 00:17:44,373 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-03-12 00:17:44,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 88 events. 32/88 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 291 event pairs, 4 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 140. Up to 33 conditions per place. [2021-03-12 00:17:44,375 INFO L132 encePairwiseOnDemand]: 33/38 looper letters, 6 selfloop transitions, 3 changer transitions 7/26 dead transitions. [2021-03-12 00:17:44,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 102 flow [2021-03-12 00:17:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:17:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:17:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2021-03-12 00:17:44,385 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7210526315789474 [2021-03-12 00:17:44,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 137 transitions. [2021-03-12 00:17:44,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 137 transitions. [2021-03-12 00:17:44,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:44,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 137 transitions. [2021-03-12 00:17:44,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2021-03-12 00:17:44,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:44,395 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:44,397 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 52 flow. Second operand 5 states and 137 transitions. [2021-03-12 00:17:44,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 102 flow [2021-03-12 00:17:44,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-12 00:17:44,402 INFO L241 Difference]: Finished difference. Result has 26 places, 19 transitions, 65 flow [2021-03-12 00:17:44,404 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2021-03-12 00:17:44,404 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2021-03-12 00:17:44,404 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 65 flow [2021-03-12 00:17:44,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-03-12 00:17:44,405 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:44,405 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:17:44,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 00:17:44,405 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1990997252, now seen corresponding path program 2 times [2021-03-12 00:17:44,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:44,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714886219] [2021-03-12 00:17:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:44,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:44,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:44,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:44,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714886219] [2021-03-12 00:17:44,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:44,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:17:44,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733816878] [2021-03-12 00:17:44,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:17:44,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:44,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:17:44,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:17:44,467 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 38 [2021-03-12 00:17:44,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2021-03-12 00:17:44,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:44,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 38 [2021-03-12 00:17:44,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:44,540 INFO L129 PetriNetUnfolder]: 34/94 cut-off events. [2021-03-12 00:17:44,540 INFO L130 PetriNetUnfolder]: For 35/41 co-relation queries the response was YES. [2021-03-12 00:17:44,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 94 events. 34/94 cut-off events. For 35/41 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 327 event pairs, 0 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 181. Up to 21 conditions per place. [2021-03-12 00:17:44,542 INFO L132 encePairwiseOnDemand]: 33/38 looper letters, 13 selfloop transitions, 4 changer transitions 11/38 dead transitions. [2021-03-12 00:17:44,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 189 flow [2021-03-12 00:17:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:17:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:17:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2021-03-12 00:17:44,544 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7406015037593985 [2021-03-12 00:17:44,544 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 197 transitions. [2021-03-12 00:17:44,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 197 transitions. [2021-03-12 00:17:44,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:44,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 197 transitions. [2021-03-12 00:17:44,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 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) [2021-03-12 00:17:44,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 38.0) internal successors, (304), 8 states have internal predecessors, (304), 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) [2021-03-12 00:17:44,548 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 38.0) internal successors, (304), 8 states have internal predecessors, (304), 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) [2021-03-12 00:17:44,548 INFO L185 Difference]: Start difference. First operand has 26 places, 19 transitions, 65 flow. Second operand 7 states and 197 transitions. [2021-03-12 00:17:44,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 189 flow [2021-03-12 00:17:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 166 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-03-12 00:17:44,551 INFO L241 Difference]: Finished difference. Result has 31 places, 22 transitions, 87 flow [2021-03-12 00:17:44,551 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2021-03-12 00:17:44,551 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2021-03-12 00:17:44,551 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 87 flow [2021-03-12 00:17:44,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2021-03-12 00:17:44,552 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:44,552 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:17:44,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-12 00:17:44,552 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash 196728933, now seen corresponding path program 1 times [2021-03-12 00:17:44,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:44,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754425089] [2021-03-12 00:17:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:44,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:44,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:44,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754425089] [2021-03-12 00:17:44,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:44,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-12 00:17:44,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878246499] [2021-03-12 00:17:44,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 00:17:44,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:44,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 00:17:44,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 00:17:44,579 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 38 [2021-03-12 00:17:44,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-03-12 00:17:44,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:44,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 38 [2021-03-12 00:17:44,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:44,586 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-03-12 00:17:44,587 INFO L130 PetriNetUnfolder]: For 12/14 co-relation queries the response was YES. [2021-03-12 00:17:44,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 28 events. 4/28 cut-off events. For 12/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 3/31 useless extension candidates. Maximal degree in co-relation 49. Up to 8 conditions per place. [2021-03-12 00:17:44,587 INFO L132 encePairwiseOnDemand]: 36/38 looper letters, 1 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2021-03-12 00:17:44,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 76 flow [2021-03-12 00:17:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 00:17:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-12 00:17:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2021-03-12 00:17:44,589 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-03-12 00:17:44,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2021-03-12 00:17:44,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2021-03-12 00:17:44,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:44,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2021-03-12 00:17:44,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-03-12 00:17:44,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:17:44,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:17:44,591 INFO L185 Difference]: Start difference. First operand has 31 places, 22 transitions, 87 flow. Second operand 3 states and 90 transitions. [2021-03-12 00:17:44,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 76 flow [2021-03-12 00:17:44,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 70 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-12 00:17:44,592 INFO L241 Difference]: Finished difference. Result has 26 places, 19 transitions, 68 flow [2021-03-12 00:17:44,592 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2021-03-12 00:17:44,592 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2021-03-12 00:17:44,592 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 68 flow [2021-03-12 00:17:44,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-03-12 00:17:44,593 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:44,593 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:17:44,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-12 00:17:44,593 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash -817687170, now seen corresponding path program 1 times [2021-03-12 00:17:44,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:44,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108498070] [2021-03-12 00:17:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:44,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:44,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:44,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:44,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108498070] [2021-03-12 00:17:44,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:44,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-12 00:17:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081578379] [2021-03-12 00:17:44,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 00:17:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 00:17:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 00:17:44,617 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 38 [2021-03-12 00:17:44,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-03-12 00:17:44,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:44,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 38 [2021-03-12 00:17:44,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:44,621 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2021-03-12 00:17:44,621 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-12 00:17:44,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 16 events. 1/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 2/18 useless extension candidates. Maximal degree in co-relation 24. Up to 5 conditions per place. [2021-03-12 00:17:44,621 INFO L132 encePairwiseOnDemand]: 36/38 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2021-03-12 00:17:44,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 52 flow [2021-03-12 00:17:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 00:17:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-12 00:17:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2021-03-12 00:17:44,623 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-03-12 00:17:44,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2021-03-12 00:17:44,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2021-03-12 00:17:44,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:44,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2021-03-12 00:17:44,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-03-12 00:17:44,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:17:44,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-03-12 00:17:44,625 INFO L185 Difference]: Start difference. First operand has 26 places, 19 transitions, 68 flow. Second operand 3 states and 90 transitions. [2021-03-12 00:17:44,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 14 transitions, 52 flow [2021-03-12 00:17:44,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 49 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-12 00:17:44,626 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-12 00:17:44,626 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-12 00:17:44,626 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2021-03-12 00:17:44,626 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-12 00:17:44,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-03-12 00:17:44,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-12 00:17:44,630 INFO L202 PluginConnector]: Adding new model min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.03 12:17:44 BasicIcfg [2021-03-12 00:17:44,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-12 00:17:44,632 INFO L168 Benchmark]: Toolchain (without parser) took 1362.36 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 236.7 MB in the beginning and 310.1 MB in the end (delta: -73.4 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:44,632 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 237.8 MB in the end (delta: 213.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:17:44,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:17:44,633 INFO L168 Benchmark]: Boogie Preprocessor took 16.91 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 986.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:17:44,634 INFO L168 Benchmark]: RCFGBuilder took 270.62 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 239.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:44,634 INFO L168 Benchmark]: TraceAbstraction took 1044.83 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 239.0 MB in the beginning and 310.1 MB in the end (delta: -71.1 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:44,636 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 237.8 MB in the end (delta: 213.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.91 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 986.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 270.62 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 239.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1044.83 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 239.0 MB in the beginning and 310.1 MB in the end (delta: -71.1 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 395.7ms, 33 PlacesBefore, 25 PlacesAfterwards, 25 TransitionsBefore, 17 TransitionsAfterwards, 218 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 8 TotalNumberOfCompositions, 289 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 203, positive conditional: 0, positive unconditional: 203, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 138, positive: 126, positive conditional: 0, positive unconditional: 126, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 138, positive: 126, positive conditional: 0, positive unconditional: 126, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 87, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 87, negative conditional: 0, negative unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 77, positive conditional: 0, positive unconditional: 77, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 138, unknown conditional: 0, unknown unconditional: 138] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - PositiveResult [Line: 58]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 954.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 196.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 468.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 14 SDslu, 8 SDs, 0 SdLazy, 48 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=2, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.1ms SsaConstructionTime, 41.1ms SatisfiabilityAnalysisTime, 120.9ms InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 110 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...