/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 06:03:03,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 06:03:03,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 06:03:03,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 06:03:03,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 06:03:03,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 06:03:03,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 06:03:03,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 06:03:03,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 06:03:03,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 06:03:03,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 06:03:03,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 06:03:03,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 06:03:03,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 06:03:03,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 06:03:03,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 06:03:03,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 06:03:03,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-03-11 06:03:03,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 06:03:03,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 06:03:03,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 06:03:03,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 06:03:03,596 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 06:03:03,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 06:03:03,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 06:03:03,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 06:03:03,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 06:03:03,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 06:03:03,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 06:03:03,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 06:03:03,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 06:03:03,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 06:03:03,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 06:03:03,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 06:03:03,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 06:03:03,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 06:03:03,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 06:03:03,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 06:03:03,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 06:03:03,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:03:03,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 06:03:03,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 06:03:03,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 06:03:03,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 06:03:03,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 06:03:03,600 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 06:03:03,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 06:03:03,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 06:03:03,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 06:03:03,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 06:03:03,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 06:03:03,899 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 06:03:03,899 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 06:03:03,900 INFO L432 ainManager$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 [2021-03-11 06:03:03,912 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-symm.wvr.bpl' [2021-03-11 06:03:03,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 06:03:03,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 06:03:03,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 06:03:03,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 06:03:03,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 06:03:03,957 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,962 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 06:03:03,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 06:03:03,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 06:03:03,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 06:03:03,981 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,982 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,983 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,983 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,986 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,987 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,988 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 11.03 06:03:03" (1/1) ... [2021-03-11 06:03:03,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 06:03:03,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 06:03:03,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 06:03:03,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 06:03:03,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:03:04,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 06:03:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 06:03:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 06:03:04,067 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 06:03:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 06:03:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 06:03:04,067 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 06:03:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 06:03:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 06:03:04,068 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 06:03:04,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 06:03:04,228 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 06:03:04,229 INFO L202 PluginConnector]: Adding new model simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:03:04 BoogieIcfgContainer [2021-03-11 06:03:04,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 06:03:04,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 06:03:04,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 06:03:04,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 06:03:04,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:03:03" (1/2) ... [2021-03-11 06:03:04,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24640f36 and model type simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:03:04, skipping insertion in model container [2021-03-11 06:03:04,233 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 11.03 06:03:04" (2/2) ... [2021-03-11 06:03:04,234 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-symm.wvr.bpl [2021-03-11 06:03:04,239 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 06:03:04,242 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 06:03:04,242 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 06:03:04,291 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 06:03:04,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 06:03:04,336 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 06:03:04,336 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 06:03:04,336 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 06:03:04,336 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 06:03:04,336 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 06:03:04,336 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 06:03:04,336 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 06:03:04,337 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 06:03:04,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-03-11 06:03:04,364 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 06:03:04,364 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 06:03:04,366 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. [2021-03-11 06:03:04,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-03-11 06:03:04,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-03-11 06:03:04,374 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 06:03:04,374 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 06:03:04,374 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:04,375 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:04,375 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:04,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1429089767, now seen corresponding path program 1 times [2021-03-11 06:03:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:04,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590012956] [2021-03-11 06:03:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:04,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:04,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:04,613 INFO L142 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size [2021-03-11 06:03:04,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-03-11 06:03:04,699 INFO L142 QuantifierPusher]: treesize reduction 25, result has 69.9 percent of original size [2021-03-11 06:03:04,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-03-11 06:03:04,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:04,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:04,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590012956] [2021-03-11 06:03:04,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:04,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 06:03:04,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784701357] [2021-03-11 06:03:04,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 06:03:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 06:03:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 06:03:04,750 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-03-11 06:03:04,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 10 transitions, 32 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) [2021-03-11 06:03:04,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:04,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-03-11 06:03:04,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:04,837 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 06:03:04,838 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 06:03:04,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 16 events. 0/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 06:03:04,839 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 2 selfloop transitions, 1 changer transitions 1/11 dead transitions. [2021-03-11 06:03:04,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 42 flow [2021-03-11 06:03:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 06:03:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 06:03:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-11 06:03:04,848 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2021-03-11 06:03:04,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-11 06:03:04,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-11 06:03:04,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:04,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-11 06:03:04,855 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) [2021-03-11 06:03:04,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:04,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:04,862 INFO L185 Difference]: Start difference. First operand has 17 places, 10 transitions, 32 flow. Second operand 4 states and 45 transitions. [2021-03-11 06:03:04,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 42 flow [2021-03-11 06:03:04,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 34 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 06:03:04,871 INFO L241 Difference]: Finished difference. Result has 18 places, 10 transitions, 31 flow [2021-03-11 06:03:04,873 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=10} [2021-03-11 06:03:04,873 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-03-11 06:03:04,874 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 31 flow [2021-03-11 06:03:04,874 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) [2021-03-11 06:03:04,874 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:04,874 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:04,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 06:03:04,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash -411680861, now seen corresponding path program 2 times [2021-03-11 06:03:04,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:04,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478709693] [2021-03-11 06:03:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:04,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:04,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:05,000 INFO L142 QuantifierPusher]: treesize reduction 46, result has 55.8 percent of original size [2021-03-11 06:03:05,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-03-11 06:03:05,112 INFO L142 QuantifierPusher]: treesize reduction 89, result has 50.6 percent of original size [2021-03-11 06:03:05,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-03-11 06:03:05,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:05,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:05,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478709693] [2021-03-11 06:03:05,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:05,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 06:03:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108484260] [2021-03-11 06:03:05,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 06:03:05,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 06:03:05,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 06:03:05,167 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-03-11 06:03:05,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 10 transitions, 31 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) [2021-03-11 06:03:05,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:05,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-03-11 06:03:05,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:05,211 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 06:03:05,211 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 06:03:05,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 11 events. 0/11 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 06:03:05,212 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-03-11 06:03:05,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 36 flow [2021-03-11 06:03:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 06:03:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 06:03:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-03-11 06:03:05,213 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-03-11 06:03:05,213 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-03-11 06:03:05,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-03-11 06:03:05,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:05,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-03-11 06:03:05,214 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) [2021-03-11 06:03:05,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:05,215 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:05,215 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 31 flow. Second operand 4 states and 44 transitions. [2021-03-11 06:03:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 36 flow [2021-03-11 06:03:05,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 34 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 06:03:05,216 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-03-11 06:03:05,216 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-03-11 06:03:05,217 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2021-03-11 06:03:05,217 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-03-11 06:03:05,217 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) [2021-03-11 06:03:05,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 06:03:05,222 INFO L202 PluginConnector]: Adding new model simpl-str-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:03:05 BasicIcfg [2021-03-11 06:03:05,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 06:03:05,223 INFO L168 Benchmark]: Toolchain (without parser) took 1283.04 ms. Allocated memory was 255.9 MB in the beginning and 381.7 MB in the end (delta: 125.8 MB). Free memory was 237.0 MB in the beginning and 341.3 MB in the end (delta: -104.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:05,224 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:03:05,225 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.53 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: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:05,225 INFO L168 Benchmark]: Boogie Preprocessor took 15.11 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 854.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:03:05,226 INFO L168 Benchmark]: RCFGBuilder took 239.93 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 241.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:05,226 INFO L168 Benchmark]: TraceAbstraction took 992.38 ms. Allocated memory was 255.9 MB in the beginning and 381.7 MB in the end (delta: 125.8 MB). Free memory was 241.8 MB in the beginning and 341.3 MB in the end (delta: -99.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:05,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.53 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: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.11 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 854.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 239.93 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 241.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 992.38 ms. Allocated memory was 255.9 MB in the beginning and 381.7 MB in the end (delta: 125.8 MB). Free memory was 241.8 MB in the beginning and 341.3 MB in the end (delta: -99.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 891.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 178.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.7ms, 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, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 335.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: 9.0ms SsaConstructionTime, 61.6ms SatisfiabilityAnalysisTime, 508.7ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...