/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example_unnecessary_interleavings.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:30:12,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:30:12,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:30:12,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:30:12,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:30:12,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:30:12,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:30:12,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:30:12,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:30:12,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:30:12,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:30:12,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:30:12,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:30:12,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:30:12,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:30:12,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:30:12,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:30:12,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:30:12,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:30:12,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:30:12,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:30:12,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:30:12,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:30:12,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:30:12,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:30:12,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:30:12,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:30:12,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:30:12,923 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-VariableLbe.epf [2021-03-24 13:30:12,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:30:12,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:30:12,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:30:12,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:30:12,966 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:30:12,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:30:12,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:30:12,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:30:12,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:30:12,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:30:12,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:30:12,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:30:12,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:30:12,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:30:12,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:30:12,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:30:12,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:30:12,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:30:12,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:30:12,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:30:12,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:30:12,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:30:12,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:30:12,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:30:12,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:30:12,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:30:12,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:30:12,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:30:12,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:30:12,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:30:13,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:30:13,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:30:13,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:30:13,278 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:30:13,279 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:30:13,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_unnecessary_interleavings.bpl [2021-03-24 13:30:13,280 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_unnecessary_interleavings.bpl' [2021-03-24 13:30:13,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:30:13,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:30:13,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:30:13,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:30:13,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:30:13,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:30:13,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:30:13,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:30:13,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:30:13,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/1) ... [2021-03-24 13:30:13,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:30:13,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:30:13,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:30:13,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:30:13,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (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 [2021-03-24 13:30:13,425 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_y given in one single declaration [2021-03-24 13:30:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure set_y [2021-03-24 13:30:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure set_y [2021-03-24 13:30:13,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_z given in one single declaration [2021-03-24 13:30:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure set_z [2021-03-24 13:30:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure set_z [2021-03-24 13:30:13,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:30:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:30:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:30:13,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-03-24 13:30:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-03-24 13:30:13,429 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-03-24 13:30:13,429 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:30:13,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:30:13,555 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 13:30:13,556 INFO L202 PluginConnector]: Adding new model example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:30:13 BoogieIcfgContainer [2021-03-24 13:30:13,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:30:13,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:30:13,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:30:13,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:30:13,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:30:13" (1/2) ... [2021-03-24 13:30:13,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5277f9ab and model type example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:30:13, skipping insertion in model container [2021-03-24 13:30:13,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:30:13" (2/2) ... [2021-03-24 13:30:13,578 INFO L111 eAbstractionObserver]: Analyzing ICFG example_unnecessary_interleavings.bpl [2021-03-24 13:30:13,586 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:30:13,589 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:30:13,590 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:30:13,659 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-24 13:30:13,671 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 13:30:13,687 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:30:13,688 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:30:13,688 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:30:13,688 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:30:13,688 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:30:13,688 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:30:13,688 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:30:13,688 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:30:13,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 92 flow [2021-03-24 13:30:13,714 INFO L129 PetriNetUnfolder]: 5/25 cut-off events. [2021-03-24 13:30:13,715 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-24 13:30:13,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 25 events. 5/25 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-03-24 13:30:13,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 92 flow [2021-03-24 13:30:13,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 20 transitions, 76 flow [2021-03-24 13:30:13,722 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:30:13,730 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 20 transitions, 76 flow [2021-03-24 13:30:13,732 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 20 transitions, 76 flow [2021-03-24 13:30:13,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 76 flow [2021-03-24 13:30:13,741 INFO L129 PetriNetUnfolder]: 5/23 cut-off events. [2021-03-24 13:30:13,741 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-24 13:30:13,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 23 events. 5/23 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-03-24 13:30:13,743 INFO L142 LiptonReduction]: Number of co-enabled transitions 84 [2021-03-24 13:30:13,791 INFO L154 LiptonReduction]: Checked pairs total: 27 [2021-03-24 13:30:13,792 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 13:30:13,793 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 72 [2021-03-24 13:30:13,805 INFO L129 PetriNetUnfolder]: 5/19 cut-off events. [2021-03-24 13:30:13,805 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-24 13:30:13,805 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:13,806 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:13,806 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:13,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1687139461, now seen corresponding path program 1 times [2021-03-24 13:30:13,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:13,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207986678] [2021-03-24 13:30:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:13,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:13,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:30:13,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:13,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:13,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:13,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:30:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:13,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207986678] [2021-03-24 13:30:13,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:13,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:30:13,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199712861] [2021-03-24 13:30:13,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:30:13,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:30:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:30:13,963 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2021-03-24 13:30:13,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2021-03-24 13:30:13,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:13,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2021-03-24 13:30:13,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:13,986 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-24 13:30:13,986 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-03-24 13:30:13,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 13 events. 1/13 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 3/16 useless extension candidates. Maximal degree in co-relation 11. Up to 3 conditions per place. [2021-03-24 13:30:13,987 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 1 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2021-03-24 13:30:13,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 54 flow [2021-03-24 13:30:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:30:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:30:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2021-03-24 13:30:13,999 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-03-24 13:30:13,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2021-03-24 13:30:13,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2021-03-24 13:30:14,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:14,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2021-03-24 13:30:14,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-03-24 13:30:14,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-03-24 13:30:14,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-03-24 13:30:14,017 INFO L185 Difference]: Start difference. First operand has 21 places, 17 transitions, 70 flow. Second operand 3 states and 76 transitions. [2021-03-24 13:30:14,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 54 flow [2021-03-24 13:30:14,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 38 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 13:30:14,024 INFO L241 Difference]: Finished difference. Result has 17 places, 13 transitions, 36 flow [2021-03-24 13:30:14,026 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2021-03-24 13:30:14,026 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, -4 predicate places. [2021-03-24 13:30:14,027 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 36 flow [2021-03-24 13:30:14,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2021-03-24 13:30:14,027 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:14,027 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:14,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:30:14,028 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1436662561, now seen corresponding path program 1 times [2021-03-24 13:30:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:14,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333955932] [2021-03-24 13:30:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:14,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:14,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:30:14,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:14,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:14,071 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:14,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:30:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:14,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333955932] [2021-03-24 13:30:14,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:14,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:30:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441904846] [2021-03-24 13:30:14,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:30:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:14,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:30:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:30:14,084 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2021-03-24 13:30:14,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 13 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2021-03-24 13:30:14,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:14,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2021-03-24 13:30:14,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:14,097 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 13:30:14,097 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 13:30:14,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 11 events. 0/11 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:30:14,098 INFO L132 encePairwiseOnDemand]: 26/28 looper letters, 1 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2021-03-24 13:30:14,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 11 transitions, 34 flow [2021-03-24 13:30:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:30:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:30:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-03-24 13:30:14,103 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-03-24 13:30:14,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-03-24 13:30:14,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-03-24 13:30:14,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:14,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-03-24 13:30:14,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2021-03-24 13:30:14,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-03-24 13:30:14,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-03-24 13:30:14,105 INFO L185 Difference]: Start difference. First operand has 17 places, 13 transitions, 36 flow. Second operand 3 states and 75 transitions. [2021-03-24 13:30:14,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 11 transitions, 34 flow [2021-03-24 13:30:14,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 11 transitions, 33 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:30:14,106 INFO L241 Difference]: Finished difference. Result has 18 places, 11 transitions, 31 flow [2021-03-24 13:30:14,106 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2021-03-24 13:30:14,107 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, -3 predicate places. [2021-03-24 13:30:14,107 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 31 flow [2021-03-24 13:30:14,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2021-03-24 13:30:14,107 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:30:14,108 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:30:14,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:30:14,108 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:30:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:30:14,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1427696431, now seen corresponding path program 1 times [2021-03-24 13:30:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:30:14,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692762040] [2021-03-24 13:30:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:30:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:30:14,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:30:14,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:30:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:30:14,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692762040] [2021-03-24 13:30:14,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:30:14,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 13:30:14,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606540951] [2021-03-24 13:30:14,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:30:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:30:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:30:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:30:14,130 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 28 [2021-03-24 13:30:14,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 31 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-03-24 13:30:14,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:30:14,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 28 [2021-03-24 13:30:14,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:30:14,133 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 13:30:14,133 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:30:14,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-24 13:30:14,133 INFO L132 encePairwiseOnDemand]: 26/28 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-24 13:30:14,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 31 flow [2021-03-24 13:30:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:30:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:30:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2021-03-24 13:30:14,134 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-03-24 13:30:14,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2021-03-24 13:30:14,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2021-03-24 13:30:14,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:30:14,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2021-03-24 13:30:14,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-03-24 13:30:14,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-03-24 13:30:14,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-03-24 13:30:14,136 INFO L185 Difference]: Start difference. First operand has 18 places, 11 transitions, 31 flow. Second operand 3 states and 77 transitions. [2021-03-24 13:30:14,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 31 flow [2021-03-24 13:30:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:30:14,137 INFO L241 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2021-03-24 13:30:14,137 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2021-03-24 13:30:14,138 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, -3 predicate places. [2021-03-24 13:30:14,138 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2021-03-24 13:30:14,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-03-24 13:30:14,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:30:14,141 INFO L202 PluginConnector]: Adding new model example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:30:14 BasicIcfg [2021-03-24 13:30:14,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:30:14,142 INFO L168 Benchmark]: Toolchain (without parser) took 831.69 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 203.8 MB in the end (delta: 32.8 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:14,143 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:30:14,143 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:14,144 INFO L168 Benchmark]: Boogie Preprocessor took 12.73 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 854.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:30:14,144 INFO L168 Benchmark]: RCFGBuilder took 206.33 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 225.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:14,145 INFO L168 Benchmark]: TraceAbstraction took 571.23 ms. Allocated memory is still 255.9 MB. Free memory was 241.5 MB in the beginning and 203.8 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.0 GB. [2021-03-24 13:30:14,147 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 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.73 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 854.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 206.33 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 225.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 571.23 ms. Allocated memory is still 255.9 MB. Free memory was 241.5 MB in the beginning and 203.8 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 59.3ms, 24 PlacesBefore, 21 PlacesAfterwards, 20 TransitionsBefore, 17 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 27 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 27, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 27, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 20]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 454.5ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 100.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 109.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=0, InterpolantAutomatonStates: 9, 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: 6.5ms SsaConstructionTime, 16.1ms SatisfiabilityAnalysisTime, 82.9ms InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 62 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...