/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 09:16:32,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 09:16:32,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 09:16:32,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 09:16:32,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 09:16:32,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 09:16:32,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 09:16:32,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 09:16:32,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 09:16:32,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 09:16:32,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 09:16:32,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 09:16:32,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 09:16:32,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 09:16:32,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 09:16:32,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 09:16:32,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 09:16:32,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 09:16:32,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 09:16:32,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 09:16:32,648 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-NoLbe.epf [2021-06-13 09:16:32,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 09:16:32,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 09:16:32,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 09:16:32,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 09:16:32,688 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 09:16:32,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 09:16:32,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 09:16:32,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 09:16:32,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 09:16:32,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 09:16:32,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 09:16:32,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 09:16:32,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 09:16:32,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 09:16:32,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 09:16:32,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 09:16:32,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 09:16:32,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 09:16:32,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 09:16:32,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 09:16:32,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 09:16:32,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 09:16:32,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 09:16:32,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 09:16:32,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 09:16:32,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 09:16:32,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 09:16:32,691 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 09:16:32,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 09:16:32,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 09:16:32,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 09:16:32,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 09:16:32,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 09:16:32,997 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 09:16:33,001 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 09:16:33,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-trans.wvr.bpl [2021-06-13 09:16:33,002 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-trans.wvr.bpl' [2021-06-13 09:16:33,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 09:16:33,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 09:16:33,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 09:16:33,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 09:16:33,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 09:16:33,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 09:16:33,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 09:16:33,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 09:16:33,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 09:16:33,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/1) ... [2021-06-13 09:16:33,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 09:16:33,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 09:16:33,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 09:16:33,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 09:16:33,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (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 [2021-06-13 09:16:33,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 09:16:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 09:16:33,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 09:16:33,143 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 09:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 09:16:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 09:16:33,143 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 09:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 09:16:33,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 09:16:33,144 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-13 09:16:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-13 09:16:33,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-13 09:16:33,145 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 09:16:33,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 09:16:33,281 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 09:16:33,283 INFO L202 PluginConnector]: Adding new model match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:16:33 BoogieIcfgContainer [2021-06-13 09:16:33,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 09:16:33,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 09:16:33,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 09:16:33,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 09:16:33,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:16:33" (1/2) ... [2021-06-13 09:16:33,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19848d64 and model type match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 09:16:33, skipping insertion in model container [2021-06-13 09:16:33,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:16:33" (2/2) ... [2021-06-13 09:16:33,289 INFO L111 eAbstractionObserver]: Analyzing ICFG match-trans.wvr.bpl [2021-06-13 09:16:33,294 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 09:16:33,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 09:16:33,295 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 09:16:33,355 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-13 09:16:33,373 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-13 09:16:33,393 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 09:16:33,393 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 09:16:33,393 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 09:16:33,393 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 09:16:33,393 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 09:16:33,393 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 09:16:33,393 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 09:16:33,394 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 09:16:33,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-13 09:16:33,442 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 09:16:33,443 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-13 09:16:33,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-13 09:16:33,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-13 09:16:33,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-13 09:16:33,478 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-13 09:16:33,479 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-13 09:16:33,479 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:16:33,480 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:16:33,480 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:16:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:16:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1083414778, now seen corresponding path program 1 times [2021-06-13 09:16:33,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:16:33,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256251421] [2021-06-13 09:16:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:16:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:16:33,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:33,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:33,855 INFO L142 QuantifierPusher]: treesize reduction 612, result has 21.9 percent of original size [2021-06-13 09:16:33,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-06-13 09:16:33,963 INFO L142 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-06-13 09:16:33,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 09:16:33,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:33,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-13 09:16:33,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:33,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:16:33,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:16:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256251421] [2021-06-13 09:16:33,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256251421] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:16:33,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:16:33,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:16:33,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404476184] [2021-06-13 09:16:34,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:16:34,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:16:34,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:16:34,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:16:34,017 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:16:34,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:34,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:16:34,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:16:34,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:16:34,169 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-06-13 09:16:34,170 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-06-13 09:16:34,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 40 events. 3/40 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 119 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 50. Up to 7 conditions per place. [2021-06-13 09:16:34,172 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-13 09:16:34,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-13 09:16:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:16:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:16:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:16:34,184 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:16:34,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:16:34,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:16:34,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:16:34,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:16:34,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2021-06-13 09:16:34,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:34,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:34,201 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:16:34,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-13 09:16:34,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-13 09:16:34,209 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-13 09:16:34,211 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-06-13 09:16:34,211 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-13 09:16:34,211 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-13 09:16:34,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:34,212 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:16:34,212 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:16:34,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 09:16:34,212 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:16:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:16:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1676293040, now seen corresponding path program 2 times [2021-06-13 09:16:34,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:16:34,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20963025] [2021-06-13 09:16:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:16:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:16:34,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:34,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:34,371 INFO L142 QuantifierPusher]: treesize reduction 7921, result has 2.5 percent of original size [2021-06-13 09:16:34,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-06-13 09:16:34,535 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-13 09:16:34,537 INFO L142 QuantifierPusher]: treesize reduction 5, result has 83.9 percent of original size [2021-06-13 09:16:34,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-13 09:16:34,552 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-06-13 09:16:34,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-13 09:16:34,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:34,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:16:34,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:16:34,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20963025] [2021-06-13 09:16:34,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20963025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:16:34,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:16:34,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:16:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173580501] [2021-06-13 09:16:34,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:16:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:16:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:16:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:16:34,574 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:16:34,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:34,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:16:34,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:16:34,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:16:34,740 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-06-13 09:16:34,740 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-06-13 09:16:34,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 42 events. 2/42 cut-off events. For 24/26 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 150 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2021-06-13 09:16:34,742 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-13 09:16:34,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 93 flow [2021-06-13 09:16:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:16:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:16:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:16:34,745 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:16:34,746 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:16:34,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:16:34,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:16:34,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:16:34,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2021-06-13 09:16:34,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:34,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:34,757 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:16:34,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 93 flow [2021-06-13 09:16:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 86 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-13 09:16:34,759 INFO L241 Difference]: Finished difference. Result has 29 places, 15 transitions, 59 flow [2021-06-13 09:16:34,760 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=15} [2021-06-13 09:16:34,760 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-13 09:16:34,760 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions, 59 flow [2021-06-13 09:16:34,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:34,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:16:34,761 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:16:34,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 09:16:34,761 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:16:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:16:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1282884404, now seen corresponding path program 3 times [2021-06-13 09:16:34,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:16:34,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090703478] [2021-06-13 09:16:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:16:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:16:34,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:34,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:34,864 INFO L142 QuantifierPusher]: treesize reduction 6759, result has 2.8 percent of original size [2021-06-13 09:16:34,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-06-13 09:16:35,001 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-13 09:16:35,003 INFO L142 QuantifierPusher]: treesize reduction 14, result has 63.2 percent of original size [2021-06-13 09:16:35,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-06-13 09:16:35,017 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-06-13 09:16:35,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-13 09:16:35,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:16:35,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:16:35,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090703478] [2021-06-13 09:16:35,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090703478] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:16:35,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:16:35,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:16:35,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521738083] [2021-06-13 09:16:35,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:16:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:16:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:16:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:16:35,034 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:16:35,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 15 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:16:35,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:16:35,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:16:35,174 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-06-13 09:16:35,175 INFO L130 PetriNetUnfolder]: For 42/44 co-relation queries the response was YES. [2021-06-13 09:16:35,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 34 events. 1/34 cut-off events. For 42/44 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 100 event pairs, 1 based on Foata normal form. 1/35 useless extension candidates. Maximal degree in co-relation 65. Up to 5 conditions per place. [2021-06-13 09:16:35,175 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-13 09:16:35,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 19 transitions, 101 flow [2021-06-13 09:16:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:16:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:16:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:16:35,178 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:16:35,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:16:35,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:16:35,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:16:35,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:16:35,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2021-06-13 09:16:35,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:35,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:35,180 INFO L185 Difference]: Start difference. First operand has 29 places, 15 transitions, 59 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:16:35,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 19 transitions, 101 flow [2021-06-13 09:16:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 82 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-06-13 09:16:35,184 INFO L241 Difference]: Finished difference. Result has 31 places, 16 transitions, 70 flow [2021-06-13 09:16:35,184 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=16} [2021-06-13 09:16:35,184 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2021-06-13 09:16:35,184 INFO L482 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 70 flow [2021-06-13 09:16:35,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,185 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:16:35,185 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:16:35,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 09:16:35,185 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:16:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:16:35,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1138682438, now seen corresponding path program 4 times [2021-06-13 09:16:35,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:16:35,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141989706] [2021-06-13 09:16:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:16:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:16:35,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,303 INFO L142 QuantifierPusher]: treesize reduction 6760, result has 2.8 percent of original size [2021-06-13 09:16:35,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-06-13 09:16:35,444 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-13 09:16:35,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-06-13 09:16:35,467 INFO L142 QuantifierPusher]: treesize reduction 10, result has 50.0 percent of original size [2021-06-13 09:16:35,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-13 09:16:35,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:16:35,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:16:35,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141989706] [2021-06-13 09:16:35,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141989706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:16:35,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:16:35,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:16:35,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29376499] [2021-06-13 09:16:35,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:16:35,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:16:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:16:35,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:16:35,484 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:16:35,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 16 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:16:35,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:16:35,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:16:35,634 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-06-13 09:16:35,635 INFO L130 PetriNetUnfolder]: For 41/46 co-relation queries the response was YES. [2021-06-13 09:16:35,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 28 events. 1/28 cut-off events. For 41/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 69 event pairs, 1 based on Foata normal form. 3/31 useless extension candidates. Maximal degree in co-relation 62. Up to 5 conditions per place. [2021-06-13 09:16:35,635 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 4/18 dead transitions. [2021-06-13 09:16:35,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 18 transitions, 100 flow [2021-06-13 09:16:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:16:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:16:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-06-13 09:16:35,639 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8210526315789474 [2021-06-13 09:16:35,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-06-13 09:16:35,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-06-13 09:16:35,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:16:35,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-06-13 09:16:35,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2021-06-13 09:16:35,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:35,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:35,645 INFO L185 Difference]: Start difference. First operand has 31 places, 16 transitions, 70 flow. Second operand 5 states and 78 transitions. [2021-06-13 09:16:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 18 transitions, 100 flow [2021-06-13 09:16:35,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 18 transitions, 96 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-13 09:16:35,648 INFO L241 Difference]: Finished difference. Result has 34 places, 14 transitions, 57 flow [2021-06-13 09:16:35,649 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=34, PETRI_TRANSITIONS=14} [2021-06-13 09:16:35,649 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-06-13 09:16:35,649 INFO L482 AbstractCegarLoop]: Abstraction has has 34 places, 14 transitions, 57 flow [2021-06-13 09:16:35,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,649 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:16:35,649 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:16:35,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 09:16:35,650 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:16:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:16:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash -456248230, now seen corresponding path program 5 times [2021-06-13 09:16:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:16:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999766926] [2021-06-13 09:16:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:16:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:16:35,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,709 INFO L142 QuantifierPusher]: treesize reduction 621, result has 21.7 percent of original size [2021-06-13 09:16:35,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-06-13 09:16:35,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-06-13 09:16:35,772 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-06-13 09:16:35,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-13 09:16:35,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:16:35,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:16:35,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999766926] [2021-06-13 09:16:35,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999766926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:16:35,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:16:35,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:16:35,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765694063] [2021-06-13 09:16:35,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:16:35,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:16:35,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:16:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:16:35,784 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:16:35,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 14 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:16:35,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:16:35,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:16:35,864 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-06-13 09:16:35,865 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 09:16:35,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 23 events. 0/23 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-13 09:16:35,865 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 2/16 dead transitions. [2021-06-13 09:16:35,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 90 flow [2021-06-13 09:16:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:16:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:16:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-13 09:16:35,866 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-13 09:16:35,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-13 09:16:35,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-13 09:16:35,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:16:35,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-13 09:16:35,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2021-06-13 09:16:35,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:35,868 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:35,868 INFO L185 Difference]: Start difference. First operand has 34 places, 14 transitions, 57 flow. Second operand 5 states and 77 transitions. [2021-06-13 09:16:35,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 90 flow [2021-06-13 09:16:35,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 60 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-06-13 09:16:35,869 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 47 flow [2021-06-13 09:16:35,869 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2021-06-13 09:16:35,870 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-13 09:16:35,870 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 47 flow [2021-06-13 09:16:35,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,870 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:16:35,870 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:16:35,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 09:16:35,870 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:16:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:16:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1704777336, now seen corresponding path program 6 times [2021-06-13 09:16:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:16:35,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984792415] [2021-06-13 09:16:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:16:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:16:35,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,919 INFO L142 QuantifierPusher]: treesize reduction 6599, result has 2.7 percent of original size [2021-06-13 09:16:35,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-06-13 09:16:35,969 INFO L142 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-06-13 09:16:35,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 09:16:35,982 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-06-13 09:16:35,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-13 09:16:35,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:16:35,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:16:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:16:35,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:16:35,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984792415] [2021-06-13 09:16:35,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984792415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:16:35,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:16:35,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:16:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265967665] [2021-06-13 09:16:35,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:16:35,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:16:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:16:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:16:35,993 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:16:35,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 14 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:35,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:16:35,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:16:35,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:16:36,059 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-13 09:16:36,059 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-13 09:16:36,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 14 events. 0/14 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-13 09:16:36,060 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-13 09:16:36,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 55 flow [2021-06-13 09:16:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:16:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:16:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-13 09:16:36,061 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-13 09:16:36,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-13 09:16:36,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-13 09:16:36,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:16:36,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-13 09:16:36,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-06-13 09:16:36,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:36,062 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 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) [2021-06-13 09:16:36,062 INFO L185 Difference]: Start difference. First operand has 29 places, 14 transitions, 47 flow. Second operand 5 states and 75 transitions. [2021-06-13 09:16:36,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 55 flow [2021-06-13 09:16:36,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-13 09:16:36,063 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-13 09:16:36,063 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-06-13 09:16:36,064 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-13 09:16:36,064 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-13 09:16:36,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-06-13 09:16:36,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 09:16:36,066 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 09:16:36,068 INFO L202 PluginConnector]: Adding new model match-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 09:16:36 BasicIcfg [2021-06-13 09:16:36,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 09:16:36,070 INFO L168 Benchmark]: Toolchain (without parser) took 3035.69 ms. Allocated memory was 199.2 MB in the beginning and 284.2 MB in the end (delta: 84.9 MB). Free memory was 179.1 MB in the beginning and 103.5 MB in the end (delta: 75.6 MB). Peak memory consumption was 161.6 MB. Max. memory is 8.0 GB. [2021-06-13 09:16:36,071 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:16:36,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.96 ms. Allocated memory is still 199.2 MB. Free memory was 179.0 MB in the beginning and 177.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:16:36,075 INFO L168 Benchmark]: Boogie Preprocessor took 13.73 ms. Allocated memory is still 199.2 MB. Free memory was 177.6 MB in the beginning and 176.7 MB in the end (delta: 873.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-13 09:16:36,076 INFO L168 Benchmark]: RCFGBuilder took 211.71 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 166.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-06-13 09:16:36,076 INFO L168 Benchmark]: TraceAbstraction took 2784.21 ms. Allocated memory was 199.2 MB in the beginning and 284.2 MB in the end (delta: 84.9 MB). Free memory was 165.7 MB in the beginning and 103.5 MB in the end (delta: 62.2 MB). Peak memory consumption was 148.0 MB. Max. memory is 8.0 GB. [2021-06-13 09:16:36,082 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 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.96 ms. Allocated memory is still 199.2 MB. Free memory was 179.0 MB in the beginning and 177.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.73 ms. Allocated memory is still 199.2 MB. Free memory was 177.6 MB in the beginning and 176.7 MB in the end (delta: 873.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 211.71 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 166.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2784.21 ms. Allocated memory was 199.2 MB in the beginning and 284.2 MB in the end (delta: 84.9 MB). Free memory was 165.7 MB in the beginning and 103.5 MB in the end (delta: 62.2 MB). Peak memory consumption was 148.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 22.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2677.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 863.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 92 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1303.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=3, InterpolantAutomatonStates: 30, 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: 20.7ms SsaConstructionTime, 154.3ms SatisfiabilityAnalysisTime, 1410.0ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 1514 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...