/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/simpl-str-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 09:29:36,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 09:29:36,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 09:29:36,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 09:29:36,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 09:29:36,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 09:29:36,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 09:29:36,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 09:29:36,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 09:29:36,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 09:29:36,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 09:29:36,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 09:29:36,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 09:29:36,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 09:29:36,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 09:29:36,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 09:29:36,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 09:29:36,176 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 09:29:36,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 09:29:36,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 09:29:36,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 09:29:36,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 09:29:36,197 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 09:29:36,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 09:29:36,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 09:29:36,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 09:29:36,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 09:29:36,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 09:29:36,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 09:29:36,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 09:29:36,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 09:29:36,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 09:29:36,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 09:29:36,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 09:29:36,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 09:29:36,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 09:29:36,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 09:29:36,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 09:29:36,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 09:29:36,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 09:29:36,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 09:29:36,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 09:29:36,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 09:29:36,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 09:29:36,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 09:29:36,201 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 09:29:36,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 09:29:36,201 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 09:29:36,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 09:29:36,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 09:29:36,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 09:29:36,497 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 09:29:36,501 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 09:29:36,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-trans.wvr.bpl [2021-06-13 09:29:36,502 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-trans.wvr.bpl' [2021-06-13 09:29:36,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 09:29:36,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 09:29:36,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 09:29:36,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 09:29:36,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 09:29:36,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 09:29:36,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 09:29:36,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 09:29:36,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 09:29:36,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/1) ... [2021-06-13 09:29:36,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 09:29:36,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 09:29:36,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 09:29:36,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 09:29:36,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (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 09:29:36,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 09:29:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 09:29:36,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 09:29:36,670 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 09:29:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 09:29:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 09:29:36,670 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 09:29:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 09:29:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 09:29:36,671 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-13 09:29:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-13 09:29:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-13 09:29:36,672 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 09:29:36,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 09:29:36,830 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 09:29:36,831 INFO L202 PluginConnector]: Adding new model simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:29:36 BoogieIcfgContainer [2021-06-13 09:29:36,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 09:29:36,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 09:29:36,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 09:29:36,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 09:29:36,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:29:36" (1/2) ... [2021-06-13 09:29:36,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353c0a9c and model type simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 09:29:36, skipping insertion in model container [2021-06-13 09:29:36,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:29:36" (2/2) ... [2021-06-13 09:29:36,837 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-trans.wvr.bpl [2021-06-13 09:29:36,842 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 09:29:36,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 09:29:36,843 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 09:29:36,871 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-13 09:29:36,889 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-13 09:29:36,907 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 09:29:36,907 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 09:29:36,907 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 09:29:36,908 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 09:29:36,908 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 09:29:36,908 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 09:29:36,908 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 09:29:36,908 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 09:29:36,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-13 09:29:36,933 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 09:29:36,933 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-13 09:29:36,935 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 14 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 09:29:36,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-13 09:29:36,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-13 09:29:36,945 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-13 09:29:36,945 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-13 09:29:36,945 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:29:36,946 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:29:36,946 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:29:36,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:29:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1083414440, now seen corresponding path program 1 times [2021-06-13 09:29:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:29:36,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284857245] [2021-06-13 09:29:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:29:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:29:37,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:37,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:37,182 INFO L142 QuantifierPusher]: treesize reduction 11, result has 60.7 percent of original size [2021-06-13 09:29:37,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 09:29:37,207 INFO L142 QuantifierPusher]: treesize reduction 10, result has 74.4 percent of original size [2021-06-13 09:29:37,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-06-13 09:29:37,251 INFO L142 QuantifierPusher]: treesize reduction 14, result has 61.1 percent of original size [2021-06-13 09:29:37,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-13 09:29:37,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:37,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:37,273 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 09:29:37,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:29:37,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284857245] [2021-06-13 09:29:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284857245] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:29:37,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:29:37,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:29:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368981159] [2021-06-13 09:29:37,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:29:37,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:29:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:29:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:29:37,294 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:29:37,297 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 09:29:37,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:29:37,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:29:37,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:29:37,407 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-06-13 09:29:37,407 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-06-13 09:29:37,409 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 8. Compared 122 event pairs, 1 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 50. Up to 7 conditions per place. [2021-06-13 09:29:37,410 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-13 09:29:37,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-13 09:29:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:29:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:29:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:29:37,419 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:29:37,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:29:37,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,424 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 09:29:37,427 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 09:29:37,427 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 09:29:37,428 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:29:37,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-13 09:29:37,432 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 09:29:37,433 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-13 09:29:37,435 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 09:29:37,436 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-13 09:29:37,436 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-13 09:29:37,436 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 09:29:37,436 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:29:37,436 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:29:37,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 09:29:37,437 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:29:37,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:29:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1676292702, now seen corresponding path program 2 times [2021-06-13 09:29:37,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:29:37,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478889226] [2021-06-13 09:29:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:29:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:29:37,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:37,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:37,491 INFO L142 QuantifierPusher]: treesize reduction 17, result has 61.4 percent of original size [2021-06-13 09:29:37,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-06-13 09:29:37,514 INFO L142 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-06-13 09:29:37,515 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-06-13 09:29:37,547 INFO L142 QuantifierPusher]: treesize reduction 16, result has 57.9 percent of original size [2021-06-13 09:29:37,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-13 09:29:37,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:37,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:37,571 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 09:29:37,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:29:37,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478889226] [2021-06-13 09:29:37,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478889226] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:29:37,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:29:37,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:29:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406582479] [2021-06-13 09:29:37,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:29:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:29:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:29:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:29:37,575 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:29:37,575 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 09:29:37,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:29:37,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:29:37,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:29:37,749 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-06-13 09:29:37,749 INFO L130 PetriNetUnfolder]: For 24/27 co-relation queries the response was YES. [2021-06-13 09:29:37,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 42 events. 2/42 cut-off events. For 24/27 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 146 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2021-06-13 09:29:37,751 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-13 09:29:37,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 93 flow [2021-06-13 09:29:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:29:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:29:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:29:37,754 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:29:37,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:29:37,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,761 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 09:29:37,764 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 09:29:37,767 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 09:29:37,768 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:29:37,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 93 flow [2021-06-13 09:29:37,769 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 09:29:37,770 INFO L241 Difference]: Finished difference. Result has 29 places, 15 transitions, 59 flow [2021-06-13 09:29:37,770 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 09:29:37,771 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-13 09:29:37,771 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions, 59 flow [2021-06-13 09:29:37,771 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 09:29:37,771 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:29:37,772 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:29:37,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 09:29:37,772 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:29:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:29:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1571345688, now seen corresponding path program 3 times [2021-06-13 09:29:37,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:29:37,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138226959] [2021-06-13 09:29:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:29:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:29:37,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:37,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:37,853 INFO L142 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-06-13 09:29:37,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-13 09:29:37,864 INFO L142 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size [2021-06-13 09:29:37,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-06-13 09:29:37,880 INFO L142 QuantifierPusher]: treesize reduction 20, result has 52.4 percent of original size [2021-06-13 09:29:37,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-13 09:29:37,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:37,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:37,893 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 09:29:37,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:29:37,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138226959] [2021-06-13 09:29:37,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138226959] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:29:37,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:29:37,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:29:37,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312586586] [2021-06-13 09:29:37,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:29:37,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:29:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:29:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:29:37,896 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:29:37,896 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 09:29:37,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:29:37,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:29:37,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:29:37,991 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-06-13 09:29:37,991 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-06-13 09:29:37,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 34 events. 1/34 cut-off events. For 42/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 1 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 65. Up to 5 conditions per place. [2021-06-13 09:29:37,992 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-13 09:29:37,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 19 transitions, 101 flow [2021-06-13 09:29:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:29:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:29:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-13 09:29:37,995 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-13 09:29:37,995 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:29:37,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-13 09:29:37,996 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 09:29:37,997 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 09:29:37,997 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 09:29:37,997 INFO L185 Difference]: Start difference. First operand has 29 places, 15 transitions, 59 flow. Second operand 5 states and 79 transitions. [2021-06-13 09:29:37,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 19 transitions, 101 flow [2021-06-13 09:29:38,000 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 09:29:38,002 INFO L241 Difference]: Finished difference. Result has 31 places, 16 transitions, 70 flow [2021-06-13 09:29:38,002 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 09:29:38,002 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2021-06-13 09:29:38,002 INFO L482 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 70 flow [2021-06-13 09:29:38,003 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 09:29:38,003 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:29:38,003 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:29:38,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 09:29:38,004 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:29:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:29:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1254073314, now seen corresponding path program 4 times [2021-06-13 09:29:38,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:29:38,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520089594] [2021-06-13 09:29:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:29:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:29:38,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:38,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:38,091 INFO L142 QuantifierPusher]: treesize reduction 41, result has 31.7 percent of original size [2021-06-13 09:29:38,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-13 09:29:38,121 INFO L142 QuantifierPusher]: treesize reduction 35, result has 47.8 percent of original size [2021-06-13 09:29:38,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-06-13 09:29:38,151 INFO L142 QuantifierPusher]: treesize reduction 57, result has 40.6 percent of original size [2021-06-13 09:29:38,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-06-13 09:29:38,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:38,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:38,177 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 09:29:38,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:29:38,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520089594] [2021-06-13 09:29:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520089594] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:29:38,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:29:38,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:29:38,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39473655] [2021-06-13 09:29:38,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:29:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:29:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:29:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:29:38,182 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:29:38,182 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 09:29:38,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:29:38,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:29:38,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:29:38,280 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-06-13 09:29:38,280 INFO L130 PetriNetUnfolder]: For 41/49 co-relation queries the response was YES. [2021-06-13 09:29:38,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 28 events. 1/28 cut-off events. For 41/49 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 71 event pairs, 1 based on Foata normal form. 3/30 useless extension candidates. Maximal degree in co-relation 62. Up to 5 conditions per place. [2021-06-13 09:29:38,281 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 4/18 dead transitions. [2021-06-13 09:29:38,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 18 transitions, 100 flow [2021-06-13 09:29:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:29:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:29:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-06-13 09:29:38,284 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8210526315789474 [2021-06-13 09:29:38,284 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-06-13 09:29:38,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-06-13 09:29:38,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:29:38,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-06-13 09:29:38,286 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 09:29:38,286 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 09:29:38,286 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 09:29:38,286 INFO L185 Difference]: Start difference. First operand has 31 places, 16 transitions, 70 flow. Second operand 5 states and 78 transitions. [2021-06-13 09:29:38,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 18 transitions, 100 flow [2021-06-13 09:29:38,291 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 09:29:38,292 INFO L241 Difference]: Finished difference. Result has 34 places, 14 transitions, 57 flow [2021-06-13 09:29:38,292 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 09:29:38,292 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-06-13 09:29:38,292 INFO L482 AbstractCegarLoop]: Abstraction has has 34 places, 14 transitions, 57 flow [2021-06-13 09:29:38,294 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 09:29:38,294 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:29:38,294 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:29:38,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 09:29:38,295 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:29:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:29:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1262486502, now seen corresponding path program 5 times [2021-06-13 09:29:38,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:29:38,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852571965] [2021-06-13 09:29:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:29:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:29:38,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:38,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:38,347 INFO L142 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size [2021-06-13 09:29:38,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-06-13 09:29:38,366 INFO L142 QuantifierPusher]: treesize reduction 4, result has 88.9 percent of original size [2021-06-13 09:29:38,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-06-13 09:29:38,389 INFO L142 QuantifierPusher]: treesize reduction 16, result has 57.9 percent of original size [2021-06-13 09:29:38,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-13 09:29:38,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:38,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:38,405 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 09:29:38,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:29:38,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852571965] [2021-06-13 09:29:38,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852571965] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:29:38,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:29:38,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:29:38,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281808155] [2021-06-13 09:29:38,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:29:38,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:29:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:29:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:29:38,410 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:29:38,410 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 09:29:38,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:29:38,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:29:38,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:29:38,519 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-06-13 09:29:38,519 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 09:29:38,519 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 4. Compared 30 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 09:29:38,520 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 2/16 dead transitions. [2021-06-13 09:29:38,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 90 flow [2021-06-13 09:29:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:29:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:29:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-13 09:29:38,521 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-13 09:29:38,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-13 09:29:38,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-13 09:29:38,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:29:38,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-13 09:29:38,522 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 09:29:38,525 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 09:29:38,525 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 09:29:38,525 INFO L185 Difference]: Start difference. First operand has 34 places, 14 transitions, 57 flow. Second operand 5 states and 77 transitions. [2021-06-13 09:29:38,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 90 flow [2021-06-13 09:29:38,526 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 09:29:38,527 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 47 flow [2021-06-13 09:29:38,527 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 09:29:38,527 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-13 09:29:38,527 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 47 flow [2021-06-13 09:29:38,528 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 09:29:38,528 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:29:38,528 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:29:38,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 09:29:38,528 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:29:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:29:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -523898182, now seen corresponding path program 6 times [2021-06-13 09:29:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:29:38,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365310794] [2021-06-13 09:29:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:29:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:29:38,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:38,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:38,583 INFO L142 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-06-13 09:29:38,584 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-13 09:29:38,597 INFO L142 QuantifierPusher]: treesize reduction 4, result has 87.9 percent of original size [2021-06-13 09:29:38,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-06-13 09:29:38,615 INFO L142 QuantifierPusher]: treesize reduction 16, result has 57.9 percent of original size [2021-06-13 09:29:38,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-13 09:29:38,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:29:38,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:29:38,631 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 09:29:38,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:29:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365310794] [2021-06-13 09:29:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365310794] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:29:38,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:29:38,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 09:29:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509423034] [2021-06-13 09:29:38,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 09:29:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:29:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 09:29:38,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-13 09:29:38,633 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-13 09:29:38,634 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 09:29:38,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:29:38,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-13 09:29:38,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:29:38,718 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-13 09:29:38,718 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-13 09:29:38,718 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 09:29:38,719 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-13 09:29:38,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 55 flow [2021-06-13 09:29:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 09:29:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 09:29:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-13 09:29:38,719 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-13 09:29:38,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-13 09:29:38,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-13 09:29:38,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:29:38,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-13 09:29:38,720 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 09:29:38,720 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 09:29:38,721 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 09:29:38,721 INFO L185 Difference]: Start difference. First operand has 29 places, 14 transitions, 47 flow. Second operand 5 states and 75 transitions. [2021-06-13 09:29:38,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 55 flow [2021-06-13 09:29:38,722 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 09:29:38,722 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-13 09:29:38,722 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 09:29:38,722 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-13 09:29:38,722 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-13 09:29:38,723 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 09:29:38,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 09:29:38,725 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 09:29:38,727 INFO L202 PluginConnector]: Adding new model simpl-str-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 09:29:38 BasicIcfg [2021-06-13 09:29:38,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 09:29:38,728 INFO L168 Benchmark]: Toolchain (without parser) took 2173.90 ms. Allocated memory is still 212.9 MB. Free memory was 192.9 MB in the beginning and 107.6 MB in the end (delta: 85.2 MB). Peak memory consumption was 85.8 MB. Max. memory is 8.0 GB. [2021-06-13 09:29:38,729 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 212.9 MB. Free memory is still 193.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:29:38,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.97 ms. Allocated memory is still 212.9 MB. Free memory was 192.9 MB in the beginning and 191.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 09:29:38,732 INFO L168 Benchmark]: Boogie Preprocessor took 15.45 ms. Allocated memory is still 212.9 MB. Free memory was 191.3 MB in the beginning and 190.5 MB in the end (delta: 844.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 09:29:38,732 INFO L168 Benchmark]: RCFGBuilder took 233.63 ms. Allocated memory is still 212.9 MB. Free memory was 190.3 MB in the beginning and 180.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-06-13 09:29:38,733 INFO L168 Benchmark]: TraceAbstraction took 1894.48 ms. Allocated memory is still 212.9 MB. Free memory was 179.9 MB in the beginning and 107.6 MB in the end (delta: 72.3 MB). Peak memory consumption was 73.2 MB. Max. memory is 8.0 GB. [2021-06-13 09:29:38,737 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 0.13 ms. Allocated memory is still 212.9 MB. Free memory is still 193.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.97 ms. Allocated memory is still 212.9 MB. Free memory was 192.9 MB in the beginning and 191.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.45 ms. Allocated memory is still 212.9 MB. Free memory was 191.3 MB in the beginning and 190.5 MB in the end (delta: 844.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 233.63 ms. Allocated memory is still 212.9 MB. Free memory was 190.3 MB in the beginning and 180.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1894.48 ms. Allocated memory is still 212.9 MB. Free memory was 179.9 MB in the beginning and 107.6 MB in the end (delta: 72.3 MB). Peak memory consumption was 73.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: 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: 7.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1819.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 773.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 768.1ms 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: 12.9ms SsaConstructionTime, 119.2ms SatisfiabilityAnalysisTime, 724.7ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 1439 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...