/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 06:03:11,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 06:03:11,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 06:03:11,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 06:03:11,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 06:03:11,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 06:03:11,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 06:03:11,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 06:03:11,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 06:03:11,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 06:03:11,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 06:03:11,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 06:03:11,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 06:03:11,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 06:03:11,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 06:03:11,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 06:03:11,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 06:03:11,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 06:03:11,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 06:03:11,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 06:03:11,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 06:03:11,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 06:03:11,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 06:03:11,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 06:03:11,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 06:03:11,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 06:03:11,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 06:03:11,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 06:03:11,865 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 [2021-03-11 06:03:11,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 06:03:11,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 06:03:11,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 06:03:11,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 06:03:11,901 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 06:03:11,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 06:03:11,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 06:03:11,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 06:03:11,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 06:03:11,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 06:03:11,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 06:03:11,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 06:03:11,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 06:03:11,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 06:03:11,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 06:03:11,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 06:03:11,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 06:03:11,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 06:03:11,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 06:03:11,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 06:03:11,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 06:03:11,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:03:11,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 06:03:11,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 06:03:11,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 06:03:11,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 06:03:11,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 06:03:11,905 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 06:03:11,905 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 06:03:11,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 06:03:12,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 06:03:12,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 06:03:12,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 06:03:12,234 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 06:03:12,235 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 06:03:12,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-subst.wvr.bpl [2021-03-11 06:03:12,236 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/sre-subst.wvr.bpl' [2021-03-11 06:03:12,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 06:03:12,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 06:03:12,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 06:03:12,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 06:03:12,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 06:03:12,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 06:03:12,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 06:03:12,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 06:03:12,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 06:03:12,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... [2021-03-11 06:03:12,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 06:03:12,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 06:03:12,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 06:03:12,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 06:03:12,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:03:12,409 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 06:03:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 06:03:12,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 06:03:12,411 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 06:03:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 06:03:12,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 06:03:12,412 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 06:03:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 06:03:12,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 06:03:12,412 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 06:03:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 06:03:12,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 06:03:12,413 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 06:03:12,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 06:03:12,550 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 06:03:12,551 INFO L202 PluginConnector]: Adding new model sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:03:12 BoogieIcfgContainer [2021-03-11 06:03:12,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 06:03:12,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 06:03:12,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 06:03:12,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 06:03:12,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:12" (1/2) ... [2021-03-11 06:03:12,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2459b04a and model type sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:03:12, skipping insertion in model container [2021-03-11 06:03:12,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:03:12" (2/2) ... [2021-03-11 06:03:12,557 INFO L111 eAbstractionObserver]: Analyzing ICFG sre-subst.wvr.bpl [2021-03-11 06:03:12,561 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 06:03:12,565 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 06:03:12,565 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 06:03:12,604 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 06:03:12,619 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 06:03:12,636 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 06:03:12,636 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 06:03:12,636 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 06:03:12,636 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 06:03:12,636 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 06:03:12,636 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 06:03:12,636 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 06:03:12,636 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 06:03:12,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 06:03:12,661 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 06:03:12,661 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:03:12,663 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 15 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. [2021-03-11 06:03:12,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 06:03:12,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-11 06:03:12,673 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 06:03:12,673 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:03:12,673 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:12,674 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:12,674 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:12,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1083414522, now seen corresponding path program 1 times [2021-03-11 06:03:12,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:12,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688633943] [2021-03-11 06:03:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:12,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:12,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:12,960 INFO L142 QuantifierPusher]: treesize reduction 135, result has 19.2 percent of original size [2021-03-11 06:03:12,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-03-11 06:03:13,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:13,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-03-11 06:03:13,091 INFO L142 QuantifierPusher]: treesize reduction 6, result has 89.5 percent of original size [2021-03-11 06:03:13,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-03-11 06:03:13,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:13,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688633943] [2021-03-11 06:03:13,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:13,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:13,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342014678] [2021-03-11 06:03:13,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:13,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:13,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:13,206 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:13,208 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) [2021-03-11 06:03:13,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:13,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:13,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:13,397 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-11 06:03:13,573 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-11 06:03:13,596 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-03-11 06:03:13,596 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-03-11 06:03:13,598 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 120 event pairs, 1 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 50. Up to 7 conditions per place. [2021-03-11 06:03:13,600 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-03-11 06:03:13,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-03-11 06:03:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 06:03:13,610 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 06:03:13,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 06:03:13,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 06:03:13,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:13,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 06:03:13,617 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) [2021-03-11 06:03:13,623 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) [2021-03-11 06:03:13,623 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) [2021-03-11 06:03:13,624 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-03-11 06:03:13,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-03-11 06:03:13,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 06:03:13,632 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-03-11 06:03:13,634 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} [2021-03-11 06:03:13,634 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-03-11 06:03:13,634 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-03-11 06:03:13,635 INFO L481 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) [2021-03-11 06:03:13,635 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:13,635 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:13,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 06:03:13,635 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash -478404086, now seen corresponding path program 2 times [2021-03-11 06:03:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:13,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353733770] [2021-03-11 06:03:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:13,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:13,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:13,718 INFO L142 QuantifierPusher]: treesize reduction 135, result has 19.2 percent of original size [2021-03-11 06:03:13,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-03-11 06:03:13,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:13,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-03-11 06:03:13,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:13,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 06:03:13,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:13,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353733770] [2021-03-11 06:03:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:13,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:13,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100948727] [2021-03-11 06:03:13,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:13,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:13,836 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:13,838 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) [2021-03-11 06:03:13,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:13,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:13,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:13,992 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-03-11 06:03:13,992 INFO L130 PetriNetUnfolder]: For 24/26 co-relation queries the response was YES. [2021-03-11 06:03:13,993 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. [2021-03-11 06:03:13,994 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-03-11 06:03:13,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 93 flow [2021-03-11 06:03:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 06:03:13,997 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 06:03:13,997 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 06:03:13,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 06:03:13,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:13,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 06:03:14,002 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) [2021-03-11 06:03:14,005 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) [2021-03-11 06:03:14,005 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) [2021-03-11 06:03:14,005 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-03-11 06:03:14,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 93 flow [2021-03-11 06:03:14,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 86 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 06:03:14,011 INFO L241 Difference]: Finished difference. Result has 29 places, 15 transitions, 59 flow [2021-03-11 06:03:14,011 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} [2021-03-11 06:03:14,012 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-03-11 06:03:14,012 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions, 59 flow [2021-03-11 06:03:14,012 INFO L481 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) [2021-03-11 06:03:14,012 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:14,012 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:14,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 06:03:14,013 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:14,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1282884148, now seen corresponding path program 3 times [2021-03-11 06:03:14,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:14,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64434231] [2021-03-11 06:03:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:14,074 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:14,086 INFO L142 QuantifierPusher]: treesize reduction 58, result has 77.0 percent of original size [2021-03-11 06:03:14,091 INFO L147 QuantifierPusher]: treesize reduction 30, result has 84.5 percent of original size 164 [2021-03-11 06:03:14,151 INFO L142 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size [2021-03-11 06:03:14,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-03-11 06:03:14,204 INFO L142 QuantifierPusher]: treesize reduction 6, result has 85.7 percent of original size [2021-03-11 06:03:14,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 06:03:14,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64434231] [2021-03-11 06:03:14,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:14,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846796871] [2021-03-11 06:03:14,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:14,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:14,229 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:14,229 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) [2021-03-11 06:03:14,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:14,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:14,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:14,382 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-03-11 06:03:14,382 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-03-11 06:03:14,382 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. [2021-03-11 06:03:14,383 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-03-11 06:03:14,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 19 transitions, 101 flow [2021-03-11 06:03:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 06:03:14,385 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 06:03:14,385 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 06:03:14,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 06:03:14,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:14,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 06:03:14,386 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) [2021-03-11 06:03:14,387 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) [2021-03-11 06:03:14,387 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) [2021-03-11 06:03:14,387 INFO L185 Difference]: Start difference. First operand has 29 places, 15 transitions, 59 flow. Second operand 5 states and 79 transitions. [2021-03-11 06:03:14,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 19 transitions, 101 flow [2021-03-11 06:03:14,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 82 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-11 06:03:14,390 INFO L241 Difference]: Finished difference. Result has 31 places, 16 transitions, 70 flow [2021-03-11 06:03:14,391 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} [2021-03-11 06:03:14,391 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2021-03-11 06:03:14,391 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 70 flow [2021-03-11 06:03:14,392 INFO L481 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) [2021-03-11 06:03:14,392 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:14,392 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:14,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 06:03:14,393 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1254073232, now seen corresponding path program 4 times [2021-03-11 06:03:14,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:14,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842965985] [2021-03-11 06:03:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:14,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:14,462 INFO L142 QuantifierPusher]: treesize reduction 81, result has 67.7 percent of original size [2021-03-11 06:03:14,470 INFO L147 QuantifierPusher]: treesize reduction 61, result has 64.1 percent of original size 109 [2021-03-11 06:03:14,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-03-11 06:03:14,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 06:03:14,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:14,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842965985] [2021-03-11 06:03:14,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:14,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:14,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585542420] [2021-03-11 06:03:14,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:14,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:14,600 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:14,600 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) [2021-03-11 06:03:14,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:14,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:14,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:14,760 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-03-11 06:03:14,760 INFO L130 PetriNetUnfolder]: For 41/46 co-relation queries the response was YES. [2021-03-11 06:03:14,761 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 70 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. [2021-03-11 06:03:14,761 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 4/18 dead transitions. [2021-03-11 06:03:14,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 18 transitions, 100 flow [2021-03-11 06:03:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-11 06:03:14,763 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8210526315789474 [2021-03-11 06:03:14,764 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-11 06:03:14,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-11 06:03:14,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:14,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-11 06:03:14,764 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) [2021-03-11 06:03:14,765 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) [2021-03-11 06:03:14,765 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) [2021-03-11 06:03:14,765 INFO L185 Difference]: Start difference. First operand has 31 places, 16 transitions, 70 flow. Second operand 5 states and 78 transitions. [2021-03-11 06:03:14,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 18 transitions, 100 flow [2021-03-11 06:03:14,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 18 transitions, 96 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 06:03:14,767 INFO L241 Difference]: Finished difference. Result has 34 places, 14 transitions, 57 flow [2021-03-11 06:03:14,767 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} [2021-03-11 06:03:14,767 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-03-11 06:03:14,768 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 14 transitions, 57 flow [2021-03-11 06:03:14,768 INFO L481 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) [2021-03-11 06:03:14,768 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:14,768 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:14,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 06:03:14,768 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:14,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1262486420, now seen corresponding path program 5 times [2021-03-11 06:03:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:14,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972286858] [2021-03-11 06:03:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:14,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:14,796 INFO L142 QuantifierPusher]: treesize reduction 135, result has 19.2 percent of original size [2021-03-11 06:03:14,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-03-11 06:03:14,821 INFO L142 QuantifierPusher]: treesize reduction 7, result has 92.5 percent of original size [2021-03-11 06:03:14,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-03-11 06:03:14,960 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-11 06:03:14,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 06:03:14,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:14,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:14,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972286858] [2021-03-11 06:03:14,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:14,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:14,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762362436] [2021-03-11 06:03:14,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:14,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:14,986 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:14,986 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) [2021-03-11 06:03:14,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:14,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:14,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:15,119 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 06:03:15,265 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 06:03:15,271 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-11 06:03:15,272 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 06:03:15,272 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 29 event pairs, 0 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 06:03:15,272 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 2/16 dead transitions. [2021-03-11 06:03:15,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 90 flow [2021-03-11 06:03:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-11 06:03:15,273 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-03-11 06:03:15,273 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-11 06:03:15,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-11 06:03:15,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:15,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-11 06:03:15,274 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) [2021-03-11 06:03:15,274 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) [2021-03-11 06:03:15,275 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) [2021-03-11 06:03:15,275 INFO L185 Difference]: Start difference. First operand has 34 places, 14 transitions, 57 flow. Second operand 5 states and 77 transitions. [2021-03-11 06:03:15,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 90 flow [2021-03-11 06:03:15,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 60 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-03-11 06:03:15,276 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 47 flow [2021-03-11 06:03:15,276 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} [2021-03-11 06:03:15,277 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-03-11 06:03:15,277 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 47 flow [2021-03-11 06:03:15,277 INFO L481 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) [2021-03-11 06:03:15,277 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:15,277 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:15,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 06:03:15,277 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:15,278 INFO L82 PathProgramCache]: Analyzing trace with hash -784547208, now seen corresponding path program 6 times [2021-03-11 06:03:15,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:15,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686167586] [2021-03-11 06:03:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:15,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:15,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:15,307 INFO L142 QuantifierPusher]: treesize reduction 90, result has 36.6 percent of original size [2021-03-11 06:03:15,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-03-11 06:03:15,353 INFO L142 QuantifierPusher]: treesize reduction 15, result has 83.7 percent of original size [2021-03-11 06:03:15,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-03-11 06:03:15,457 INFO L142 QuantifierPusher]: treesize reduction 9, result has 82.0 percent of original size [2021-03-11 06:03:15,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-03-11 06:03:15,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:15,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:15,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686167586] [2021-03-11 06:03:15,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:15,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285636034] [2021-03-11 06:03:15,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:15,483 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:15,483 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) [2021-03-11 06:03:15,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:15,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:15,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:15,600 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-11 06:03:15,739 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-11 06:03:15,740 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 06:03:15,740 INFO L130 PetriNetUnfolder]: For 9/11 co-relation queries the response was YES. [2021-03-11 06:03:15,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 14 events. 0/14 cut-off events. For 9/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 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. [2021-03-11 06:03:15,741 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-11 06:03:15,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 55 flow [2021-03-11 06:03:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-11 06:03:15,742 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-03-11 06:03:15,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-11 06:03:15,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-11 06:03:15,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:15,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-11 06:03:15,742 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) [2021-03-11 06:03:15,743 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) [2021-03-11 06:03:15,743 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) [2021-03-11 06:03:15,743 INFO L185 Difference]: Start difference. First operand has 29 places, 14 transitions, 47 flow. Second operand 5 states and 75 transitions. [2021-03-11 06:03:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 55 flow [2021-03-11 06:03:15,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 06:03:15,744 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-03-11 06:03:15,744 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} [2021-03-11 06:03:15,744 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-03-11 06:03:15,744 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-03-11 06:03:15,744 INFO L481 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) [2021-03-11 06:03:15,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 06:03:15,747 INFO L202 PluginConnector]: Adding new model sre-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:03:15 BasicIcfg [2021-03-11 06:03:15,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 06:03:15,748 INFO L168 Benchmark]: Toolchain (without parser) took 3447.66 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 236.5 MB in the beginning and 276.2 MB in the end (delta: -39.7 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:15,748 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:03:15,749 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:03:15,749 INFO L168 Benchmark]: Boogie Preprocessor took 13.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 866.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:15,749 INFO L168 Benchmark]: RCFGBuilder took 206.61 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 239.7 MB in the end (delta: -6.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:15,750 INFO L168 Benchmark]: TraceAbstraction took 3194.48 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 239.3 MB in the beginning and 276.2 MB in the end (delta: -36.9 MB). Peak memory consumption was 63.2 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:15,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 866.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 206.61 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 239.7 MB in the end (delta: -6.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3194.48 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 239.3 MB in the beginning and 276.2 MB in the end (delta: -36.9 MB). Peak memory consumption was 63.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3112.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1496.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 92 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1999.8ms 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: 27.8ms SsaConstructionTime, 101.3ms SatisfiabilityAnalysisTime, 1293.1ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2087 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...