/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 09:22:58,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 09:22:58,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 09:22:58,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 09:22:58,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 09:22:58,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 09:22:58,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 09:22:58,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 09:22:58,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 09:22:58,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 09:22:58,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 09:22:58,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 09:22:58,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 09:22:58,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 09:22:58,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 09:22:58,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 09:22:58,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 09:22:58,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 09:22:58,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 09:22:58,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 09:22:58,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 09:22:58,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 09:22:58,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 09:22:58,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 09:22:58,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 09:22:58,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 09:22:58,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 09:22:58,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 09:22:58,466 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-RepeatedVariableLbe.epf [2021-03-25 09:22:58,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 09:22:58,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 09:22:58,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 09:22:58,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 09:22:58,494 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 09:22:58,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 09:22:58,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 09:22:58,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 09:22:58,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 09:22:58,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 09:22:58,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 09:22:58,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 09:22:58,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 09:22:58,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 09:22:58,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 09:22:58,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 09:22:58,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 09:22:58,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 09:22:58,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 09:22:58,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 09:22:58,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 09:22:58,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 09:22:58,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 09:22:58,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 09:22:58,498 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 09:22:58,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 09:22:58,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 09:22:58,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 09:22:58,807 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 09:22:58,808 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 09:22:58,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-symm.wvr.bpl [2021-03-25 09:22:58,814 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-symm.wvr.bpl' [2021-03-25 09:22:58,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 09:22:58,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 09:22:58,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 09:22:58,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 09:22:58,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 09:22:58,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 09:22:58,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 09:22:58,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 09:22:58,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 09:22:58,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/1) ... [2021-03-25 09:22:58,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 09:22:58,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 09:22:58,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 09:22:58,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 09:22:58,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (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 [2021-03-25 09:22:58,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 09:22:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 09:22:58,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 09:22:58,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 09:22:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 09:22:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 09:22:58,965 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 09:22:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 09:22:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 09:22:58,965 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 09:22:59,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 09:22:59,108 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 09:22:59,110 INFO L202 PluginConnector]: Adding new model simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 09:22:59 BoogieIcfgContainer [2021-03-25 09:22:59,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 09:22:59,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 09:22:59,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 09:22:59,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 09:22:59,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:22:58" (1/2) ... [2021-03-25 09:22:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c940de and model type simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 09:22:59, skipping insertion in model container [2021-03-25 09:22:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 09:22:59" (2/2) ... [2021-03-25 09:22:59,119 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-symm.wvr.bpl [2021-03-25 09:22:59,126 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 09:22:59,129 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 09:22:59,131 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 09:22:59,190 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-25 09:22:59,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 09:22:59,242 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 09:22:59,243 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 09:22:59,243 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 09:22:59,243 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 09:22:59,243 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 09:22:59,243 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 09:22:59,243 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 09:22:59,243 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 09:22:59,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-03-25 09:22:59,275 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-25 09:22:59,276 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 09:22:59,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 0/12 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 09:22:59,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-03-25 09:22:59,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-03-25 09:22:59,282 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:22:59,291 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 10 transitions, 32 flow [2021-03-25 09:22:59,295 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 10 transitions, 32 flow [2021-03-25 09:22:59,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 10 transitions, 32 flow [2021-03-25 09:22:59,309 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 09:22:59,309 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 09:22:59,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 10 events. 0/10 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 09:22:59,311 INFO L142 LiptonReduction]: Number of co-enabled transitions 16 [2021-03-25 09:22:59,389 INFO L154 LiptonReduction]: Checked pairs total: 6 [2021-03-25 09:22:59,389 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-25 09:22:59,390 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 109 [2021-03-25 09:22:59,397 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 09:22:59,397 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 09:22:59,397 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 09:22:59,398 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 09:22:59,398 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 09:22:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 09:22:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1663540027, now seen corresponding path program 1 times [2021-03-25 09:22:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 09:22:59,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534666944] [2021-03-25 09:22:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 09:22:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 09:22:59,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:22:59,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 09:22:59,684 INFO L142 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size [2021-03-25 09:22:59,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-03-25 09:22:59,726 INFO L142 QuantifierPusher]: treesize reduction 25, result has 69.9 percent of original size [2021-03-25 09:22:59,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-03-25 09:22:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 09:22:59,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534666944] [2021-03-25 09:22:59,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 09:22:59,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 09:22:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612103343] [2021-03-25 09:22:59,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 09:22:59,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 09:22:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 09:22:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 09:22:59,772 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 17 [2021-03-25 09:22:59,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 7 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-03-25 09:22:59,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 09:22:59,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 17 [2021-03-25 09:22:59,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 09:22:59,834 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 09:22:59,835 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 09:22:59,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 0/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 09:22:59,836 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 2 selfloop transitions, 1 changer transitions 1/8 dead transitions. [2021-03-25 09:22:59,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 8 transitions, 36 flow [2021-03-25 09:22:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 09:22:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 09:22:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-25 09:22:59,847 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2021-03-25 09:22:59,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-25 09:22:59,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-25 09:22:59,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 09:22:59,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-25 09:22:59,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-03-25 09:22:59,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2021-03-25 09:22:59,866 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2021-03-25 09:22:59,867 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 26 flow. Second operand 4 states and 45 transitions. [2021-03-25 09:22:59,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 8 transitions, 36 flow [2021-03-25 09:22:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 8 transitions, 28 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-25 09:22:59,875 INFO L241 Difference]: Finished difference. Result has 15 places, 7 transitions, 25 flow [2021-03-25 09:22:59,876 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=25, PETRI_PLACES=15, PETRI_TRANSITIONS=7} [2021-03-25 09:22:59,877 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-25 09:22:59,877 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:22:59,877 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 7 transitions, 25 flow [2021-03-25 09:22:59,878 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 7 transitions, 25 flow [2021-03-25 09:22:59,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 14 places, 7 transitions, 25 flow [2021-03-25 09:22:59,881 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-25 09:22:59,881 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 09:22:59,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 9 events. 0/9 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 09:22:59,882 INFO L142 LiptonReduction]: Number of co-enabled transitions 2 [2021-03-25 09:22:59,884 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 09:22:59,884 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 09:22:59,884 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7 [2021-03-25 09:22:59,885 INFO L480 AbstractCegarLoop]: Abstraction has has 14 places, 7 transitions, 25 flow [2021-03-25 09:22:59,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-03-25 09:22:59,886 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 09:22:59,886 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 09:22:59,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 09:22:59,886 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 09:22:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 09:22:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1664376097, now seen corresponding path program 2 times [2021-03-25 09:22:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 09:22:59,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876146737] [2021-03-25 09:22:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 09:22:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 09:23:00,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:23:00,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 09:23:00,009 INFO L142 QuantifierPusher]: treesize reduction 42, result has 58.0 percent of original size [2021-03-25 09:23:00,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-03-25 09:23:00,104 INFO L142 QuantifierPusher]: treesize reduction 89, result has 50.6 percent of original size [2021-03-25 09:23:00,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-03-25 09:23:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 09:23:00,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876146737] [2021-03-25 09:23:00,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 09:23:00,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 09:23:00,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894817668] [2021-03-25 09:23:00,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 09:23:00,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 09:23:00,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 09:23:00,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 09:23:00,155 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 17 [2021-03-25 09:23:00,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 7 transitions, 25 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-03-25 09:23:00,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 09:23:00,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 17 [2021-03-25 09:23:00,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 09:23:00,196 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-25 09:23:00,197 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-25 09:23:00,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 8 events. 0/8 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 09:23:00,197 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-25 09:23:00,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2021-03-25 09:23:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 09:23:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 09:23:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-03-25 09:23:00,198 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2021-03-25 09:23:00,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-03-25 09:23:00,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-03-25 09:23:00,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 09:23:00,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-03-25 09:23:00,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-03-25 09:23:00,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2021-03-25 09:23:00,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2021-03-25 09:23:00,201 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 25 flow. Second operand 4 states and 44 transitions. [2021-03-25 09:23:00,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2021-03-25 09:23:00,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-25 09:23:00,202 INFO L241 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2021-03-25 09:23:00,202 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2021-03-25 09:23:00,202 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-25 09:23:00,202 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:23:00,203 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 0 transitions, 0 flow [2021-03-25 09:23:00,203 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 0 transitions, 0 flow [2021-03-25 09:23:00,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 09:23:00,203 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 09:23:00,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 09:23:00,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 09:23:00,204 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 09:23:00,204 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 09:23:00,204 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 09:23:00,204 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 09:23:00,205 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 09:23:00,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-03-25 09:23:00,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 09:23:00,208 INFO L202 PluginConnector]: Adding new model simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 09:23:00 BasicIcfg [2021-03-25 09:23:00,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 09:23:00,210 INFO L168 Benchmark]: Toolchain (without parser) took 1352.76 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 236.7 MB in the beginning and 288.6 MB in the end (delta: -51.9 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.0 GB. [2021-03-25 09:23:00,210 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.51 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 171.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 09:23:00,211 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.75 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 09:23:00,211 INFO L168 Benchmark]: Boogie Preprocessor took 14.41 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 755.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 09:23:00,212 INFO L168 Benchmark]: RCFGBuilder took 212.25 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 238.5 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-25 09:23:00,212 INFO L168 Benchmark]: TraceAbstraction took 1094.86 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 237.8 MB in the beginning and 288.6 MB in the end (delta: -50.8 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.0 GB. [2021-03-25 09:23:00,214 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 0.51 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 171.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.75 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.41 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 755.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 212.25 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 238.5 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1094.86 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 237.8 MB in the beginning and 288.6 MB in the end (delta: -50.8 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 94.2ms, 17 PlacesBefore, 14 PlacesAfterwards, 10 TransitionsBefore, 7 TransitionsAfterwards, 16 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 6 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, 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: 5, positive: 5, positive conditional: 0, positive unconditional: 5, 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: 5, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5, unknown conditional: 0, unknown unconditional: 5] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.3ms, 15 PlacesBefore, 14 PlacesAfterwards, 7 TransitionsBefore, 7 TransitionsAfterwards, 2 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.1ms, 15 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , 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: 36]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 972.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 157.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 150.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 251.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 8, 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: 7.9ms SsaConstructionTime, 78.2ms SatisfiabilityAnalysisTime, 432.3ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 215 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...