/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/parallel/simple-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 06:29:06,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 06:29:06,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 06:29:06,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 06:29:06,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 06:29:06,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 06:29:06,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 06:29:06,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 06:29:06,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 06:29:06,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 06:29:06,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 06:29:06,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 06:29:06,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 06:29:06,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 06:29:06,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 06:29:06,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 06:29:06,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 06:29:06,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 06:29:06,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 06:29:06,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 06:29:06,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 06:29:06,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 06:29:06,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 06:29:06,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 06:29:06,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 06:29:06,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 06:29:06,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 06:29:06,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 06:29:06,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 06:29:06,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 06:29:06,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 06:29:06,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 06:29:06,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 06:29:06,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 06:29:06,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 06:29:06,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 06:29:06,752 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 06:29:06,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 06:29:06,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 06:29:06,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 06:29:06,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 06:29:06,792 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 06:29:06,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 06:29:06,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 06:29:06,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 06:29:06,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 06:29:06,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 06:29:06,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 06:29:06,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 06:29:06,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 06:29:06,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 06:29:06,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 06:29:06,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 06:29:06,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 06:29:06,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 06:29:06,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 06:29:06,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 06:29:06,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 06:29:06,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:29:06,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 06:29:06,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 06:29:06,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 06:29:06,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 06:29:06,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 06:29:06,797 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 06:29:06,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 06:29:06,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 06:29:07,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 06:29:07,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 06:29:07,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 06:29:07,132 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 06:29:07,133 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 06:29:07,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl [2021-03-11 06:29:07,134 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl' [2021-03-11 06:29:07,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 06:29:07,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 06:29:07,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 06:29:07,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 06:29:07,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 06:29:07,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 06:29:07,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 06:29:07,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 06:29:07,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 06:29:07,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/1) ... [2021-03-11 06:29:07,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 06:29:07,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 06:29:07,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 06:29:07,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 06:29:07,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (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 06:29:07,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 06:29:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 06:29:07,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 06:29:07,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 06:29:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 06:29:07,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 06:29:07,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 06:29:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 06:29:07,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 06:29:07,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 06:29:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 06:29:07,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 06:29:07,256 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 06:29:07,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 06:29:07,383 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 06:29:07,385 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:29:07 BoogieIcfgContainer [2021-03-11 06:29:07,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 06:29:07,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 06:29:07,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 06:29:07,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 06:29:07,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:07" (1/2) ... [2021-03-11 06:29:07,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc8969f and model type simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:29:07, skipping insertion in model container [2021-03-11 06:29:07,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:29:07" (2/2) ... [2021-03-11 06:29:07,392 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-equiv.wvr.bpl [2021-03-11 06:29:07,399 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 06:29:07,402 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 06:29:07,403 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 06:29:07,462 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 06:29:07,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 06:29:07,534 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 06:29:07,534 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 06:29:07,534 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 06:29:07,534 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 06:29:07,534 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 06:29:07,534 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 06:29:07,534 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 06:29:07,534 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 06:29:07,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 33 places, 23 transitions, 70 flow [2021-03-11 06:29:07,574 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-11 06:29:07,574 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:29:07,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 20 events. 0/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 06:29:07,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 23 transitions, 70 flow [2021-03-11 06:29:07,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 18 transitions, 54 flow [2021-03-11 06:29:07,586 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 06:29:07,586 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:29:07,591 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:07,591 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:29:07,592 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1686047739, now seen corresponding path program 1 times [2021-03-11 06:29:07,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:07,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473282123] [2021-03-11 06:29:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:07,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:07,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:07,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:07,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:07,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:07,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:07,867 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 06:29:07,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 06:29:07,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:07,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:07,872 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 06:29:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473282123] [2021-03-11 06:29:07,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:07,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52282736] [2021-03-11 06:29:07,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:07,892 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 06:29:07,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:07,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:07,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 06:29:07,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:08,105 INFO L129 PetriNetUnfolder]: 22/78 cut-off events. [2021-03-11 06:29:08,106 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-11 06:29:08,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 78 events. 22/78 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 268 event pairs, 1 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 128. Up to 29 conditions per place. [2021-03-11 06:29:08,111 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 6 selfloop transitions, 13 changer transitions 8/37 dead transitions. [2021-03-11 06:29:08,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 146 flow [2021-03-11 06:29:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 06:29:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 06:29:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2021-03-11 06:29:08,129 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7439613526570048 [2021-03-11 06:29:08,130 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 154 transitions. [2021-03-11 06:29:08,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 154 transitions. [2021-03-11 06:29:08,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:08,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 154 transitions. [2021-03-11 06:29:08,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 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 06:29:08,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,142 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,144 INFO L185 Difference]: Start difference. First operand has 28 places, 18 transitions, 54 flow. Second operand 9 states and 154 transitions. [2021-03-11 06:29:08,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 146 flow [2021-03-11 06:29:08,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 06:29:08,149 INFO L241 Difference]: Finished difference. Result has 34 places, 29 transitions, 118 flow [2021-03-11 06:29:08,150 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=118, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2021-03-11 06:29:08,151 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2021-03-11 06:29:08,151 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 118 flow [2021-03-11 06:29:08,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:08,151 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:08,151 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:29:08,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 06:29:08,152 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash 35307057, now seen corresponding path program 2 times [2021-03-11 06:29:08,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:08,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810843234] [2021-03-11 06:29:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:08,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:08,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,241 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 06:29:08,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 06:29:08,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:08,245 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 06:29:08,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810843234] [2021-03-11 06:29:08,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:08,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:08,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203621901] [2021-03-11 06:29:08,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:08,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:08,252 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 06:29:08,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 06:29:08,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:08,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 06:29:08,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:08,364 INFO L129 PetriNetUnfolder]: 20/98 cut-off events. [2021-03-11 06:29:08,364 INFO L130 PetriNetUnfolder]: For 42/46 co-relation queries the response was YES. [2021-03-11 06:29:08,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 98 events. 20/98 cut-off events. For 42/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 413 event pairs, 2 based on Foata normal form. 5/103 useless extension candidates. Maximal degree in co-relation 209. Up to 33 conditions per place. [2021-03-11 06:29:08,366 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 7 selfloop transitions, 22 changer transitions 9/48 dead transitions. [2021-03-11 06:29:08,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 284 flow [2021-03-11 06:29:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 06:29:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 06:29:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2021-03-11 06:29:08,368 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7681159420289855 [2021-03-11 06:29:08,368 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 159 transitions. [2021-03-11 06:29:08,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 159 transitions. [2021-03-11 06:29:08,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:08,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 159 transitions. [2021-03-11 06:29:08,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 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 06:29:08,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,371 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,371 INFO L185 Difference]: Start difference. First operand has 34 places, 29 transitions, 118 flow. Second operand 9 states and 159 transitions. [2021-03-11 06:29:08,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 284 flow [2021-03-11 06:29:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 270 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-03-11 06:29:08,375 INFO L241 Difference]: Finished difference. Result has 42 places, 38 transitions, 226 flow [2021-03-11 06:29:08,375 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2021-03-11 06:29:08,375 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2021-03-11 06:29:08,375 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 226 flow [2021-03-11 06:29:08,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 06:29:08,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:08,376 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:29:08,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 06:29:08,376 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1911912035, now seen corresponding path program 3 times [2021-03-11 06:29:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:08,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819717945] [2021-03-11 06:29:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:08,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:08,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,482 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 06:29:08,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 06:29:08,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:08,486 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 06:29:08,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819717945] [2021-03-11 06:29:08,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:08,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:08,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072124818] [2021-03-11 06:29:08,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:08,488 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 06:29:08,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:08,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:08,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 06:29:08,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:08,665 INFO L129 PetriNetUnfolder]: 16/98 cut-off events. [2021-03-11 06:29:08,666 INFO L130 PetriNetUnfolder]: For 89/91 co-relation queries the response was YES. [2021-03-11 06:29:08,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 98 events. 16/98 cut-off events. For 89/91 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 453 event pairs, 0 based on Foata normal form. 4/102 useless extension candidates. Maximal degree in co-relation 282. Up to 35 conditions per place. [2021-03-11 06:29:08,667 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 6 selfloop transitions, 15 changer transitions 21/52 dead transitions. [2021-03-11 06:29:08,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 404 flow [2021-03-11 06:29:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 06:29:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 06:29:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2021-03-11 06:29:08,671 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7632850241545893 [2021-03-11 06:29:08,671 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 158 transitions. [2021-03-11 06:29:08,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 158 transitions. [2021-03-11 06:29:08,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:08,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 158 transitions. [2021-03-11 06:29:08,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 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 06:29:08,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,674 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,674 INFO L185 Difference]: Start difference. First operand has 42 places, 38 transitions, 226 flow. Second operand 9 states and 158 transitions. [2021-03-11 06:29:08,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 404 flow [2021-03-11 06:29:08,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 348 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-03-11 06:29:08,681 INFO L241 Difference]: Finished difference. Result has 48 places, 31 transitions, 187 flow [2021-03-11 06:29:08,681 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=187, PETRI_PLACES=48, PETRI_TRANSITIONS=31} [2021-03-11 06:29:08,682 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2021-03-11 06:29:08,682 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 31 transitions, 187 flow [2021-03-11 06:29:08,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:08,682 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:08,682 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:29:08,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 06:29:08,682 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:08,683 INFO L82 PathProgramCache]: Analyzing trace with hash -416547445, now seen corresponding path program 4 times [2021-03-11 06:29:08,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:08,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352055023] [2021-03-11 06:29:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:08,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:08,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,741 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 06:29:08,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 06:29:08,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:08,744 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 06:29:08,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352055023] [2021-03-11 06:29:08,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:08,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:08,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705304361] [2021-03-11 06:29:08,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:08,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:08,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:08,746 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 06:29:08,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 31 transitions, 187 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:08,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:08,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 06:29:08,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:08,844 INFO L129 PetriNetUnfolder]: 6/46 cut-off events. [2021-03-11 06:29:08,845 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-03-11 06:29:08,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 46 events. 6/46 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 131 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 142. Up to 16 conditions per place. [2021-03-11 06:29:08,851 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 10 selfloop transitions, 4 changer transitions 7/31 dead transitions. [2021-03-11 06:29:08,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 31 transitions, 229 flow [2021-03-11 06:29:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 06:29:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 06:29:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2021-03-11 06:29:08,854 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2021-03-11 06:29:08,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 142 transitions. [2021-03-11 06:29:08,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 142 transitions. [2021-03-11 06:29:08,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:08,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 142 transitions. [2021-03-11 06:29:08,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 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 06:29:08,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,856 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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 06:29:08,856 INFO L185 Difference]: Start difference. First operand has 48 places, 31 transitions, 187 flow. Second operand 9 states and 142 transitions. [2021-03-11 06:29:08,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 31 transitions, 229 flow [2021-03-11 06:29:08,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 31 transitions, 173 flow, removed 12 selfloop flow, removed 11 redundant places. [2021-03-11 06:29:08,859 INFO L241 Difference]: Finished difference. Result has 40 places, 24 transitions, 108 flow [2021-03-11 06:29:08,859 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2021-03-11 06:29:08,859 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2021-03-11 06:29:08,859 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 108 flow [2021-03-11 06:29:08,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:08,859 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:08,859 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:29:08,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 06:29:08,860 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:08,860 INFO L82 PathProgramCache]: Analyzing trace with hash -779439389, now seen corresponding path program 5 times [2021-03-11 06:29:08,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:08,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570074943] [2021-03-11 06:29:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:08,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:08,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:08,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:08,958 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 06:29:08,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 06:29:08,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:08,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:08,962 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 06:29:08,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570074943] [2021-03-11 06:29:08,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:08,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:08,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157192477] [2021-03-11 06:29:08,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:08,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:08,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:08,963 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 06:29:08,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 24 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:08,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:08,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 06:29:08,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:09,056 INFO L129 PetriNetUnfolder]: 4/41 cut-off events. [2021-03-11 06:29:09,056 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-03-11 06:29:09,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 41 events. 4/41 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 108 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 104. Up to 12 conditions per place. [2021-03-11 06:29:09,057 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 1 selfloop transitions, 9 changer transitions 8/28 dead transitions. [2021-03-11 06:29:09,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 176 flow [2021-03-11 06:29:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 06:29:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-11 06:29:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2021-03-11 06:29:09,061 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.691304347826087 [2021-03-11 06:29:09,061 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 159 transitions. [2021-03-11 06:29:09,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 159 transitions. [2021-03-11 06:29:09,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:09,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 159 transitions. [2021-03-11 06:29:09,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 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 06:29:09,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:09,067 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:09,068 INFO L185 Difference]: Start difference. First operand has 40 places, 24 transitions, 108 flow. Second operand 10 states and 159 transitions. [2021-03-11 06:29:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 176 flow [2021-03-11 06:29:09,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 140 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-03-11 06:29:09,072 INFO L241 Difference]: Finished difference. Result has 38 places, 20 transitions, 82 flow [2021-03-11 06:29:09,072 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=20} [2021-03-11 06:29:09,073 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2021-03-11 06:29:09,073 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 20 transitions, 82 flow [2021-03-11 06:29:09,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:09,074 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:09,074 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:29:09,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 06:29:09,074 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash 619788161, now seen corresponding path program 6 times [2021-03-11 06:29:09,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:09,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561809205] [2021-03-11 06:29:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:09,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:09,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:09,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:09,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:09,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:09,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 06:29:09,168 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 06:29:09,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 06:29:09,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:09,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:09,173 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 06:29:09,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561809205] [2021-03-11 06:29:09,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:09,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340068276] [2021-03-11 06:29:09,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:09,175 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-03-11 06:29:09,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 20 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:09,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:09,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-03-11 06:29:09,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:09,238 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-11 06:29:09,239 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 06:29:09,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 20 events. 1/20 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 14 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2021-03-11 06:29:09,239 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2021-03-11 06:29:09,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 18 transitions, 94 flow [2021-03-11 06:29:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 06:29:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 06:29:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2021-03-11 06:29:09,243 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2021-03-11 06:29:09,243 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 108 transitions. [2021-03-11 06:29:09,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 108 transitions. [2021-03-11 06:29:09,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:09,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 108 transitions. [2021-03-11 06:29:09,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:09,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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 06:29:09,245 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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 06:29:09,245 INFO L185 Difference]: Start difference. First operand has 38 places, 20 transitions, 82 flow. Second operand 7 states and 108 transitions. [2021-03-11 06:29:09,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 18 transitions, 94 flow [2021-03-11 06:29:09,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 18 transitions, 67 flow, removed 4 selfloop flow, removed 10 redundant places. [2021-03-11 06:29:09,246 INFO L241 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2021-03-11 06:29:09,246 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2021-03-11 06:29:09,246 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2021-03-11 06:29:09,246 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2021-03-11 06:29:09,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 06:29:09,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 06:29:09,251 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:29:09 BasicIcfg [2021-03-11 06:29:09,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 06:29:09,252 INFO L168 Benchmark]: Toolchain (without parser) took 2083.62 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 236.5 MB in the beginning and 267.0 MB in the end (delta: -30.5 MB). Peak memory consumption was 80.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:09,252 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 93.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:29:09,252 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.89 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 06:29:09,253 INFO L168 Benchmark]: Boogie Preprocessor took 11.84 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: 852.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:09,253 INFO L168 Benchmark]: RCFGBuilder took 175.97 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 239.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:09,253 INFO L168 Benchmark]: TraceAbstraction took 1863.37 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 239.4 MB in the beginning and 267.0 MB in the end (delta: -27.6 MB). Peak memory consumption was 82.5 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:09,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 93.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.89 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 11.84 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: 852.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 175.97 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 239.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1863.37 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 239.4 MB in the beginning and 267.0 MB in the end (delta: -27.6 MB). Peak memory consumption was 82.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1729.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 876.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 16 SDslu, 0 SDs, 0 SdLazy, 465 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 306.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 452.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=226occurred in iteration=2, InterpolantAutomatonStates: 53, 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: 17.5ms SsaConstructionTime, 68.3ms SatisfiabilityAnalysisTime, 582.8ms InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 542 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...