/usr/bin/java -Xmx8000000000 -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/node-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 09:20:45,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 09:20:45,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 09:20:45,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 09:20:45,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 09:20:45,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 09:20:45,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 09:20:45,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 09:20:45,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 09:20:45,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 09:20:45,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 09:20:45,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 09:20:45,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 09:20:45,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 09:20:45,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 09:20:45,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 09:20:45,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 09:20:45,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 09:20:45,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 09:20:45,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 09:20:45,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 09:20:45,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 09:20:45,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 09:20:45,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 09:20:45,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 09:20:45,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 09:20:45,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 09:20:45,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 09:20:45,504 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 [2021-06-13 09:20:45,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 09:20:45,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 09:20:45,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 09:20:45,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 09:20:45,528 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 09:20:45,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 09:20:45,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 09:20:45,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 09:20:45,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 09:20:45,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 09:20:45,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 09:20:45,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 09:20:45,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 09:20:45,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 09:20:45,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 09:20:45,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 09:20:45,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 09:20:45,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 09:20:45,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 09:20:45,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 09:20:45,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 09:20:45,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 09:20:45,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 09:20:45,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 09:20:45,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 09:20:45,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 09:20:45,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 09:20:45,788 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 09:20:45,788 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 09:20:45,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-symm.wvr.bpl [2021-06-13 09:20:45,790 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-symm.wvr.bpl' [2021-06-13 09:20:45,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 09:20:45,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 09:20:45,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 09:20:45,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 09:20:45,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 09:20:45,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 09:20:45,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 09:20:45,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 09:20:45,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 09:20:45,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/1) ... [2021-06-13 09:20:45,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 09:20:45,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 09:20:45,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 09:20:45,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 09:20:45,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (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 [2021-06-13 09:20:45,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 09:20:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 09:20:45,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 09:20:45,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 09:20:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 09:20:45,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 09:20:45,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 09:20:45,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 09:20:45,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 09:20:45,923 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 09:20:46,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 09:20:46,100 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 09:20:46,101 INFO L202 PluginConnector]: Adding new model node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:20:46 BoogieIcfgContainer [2021-06-13 09:20:46,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 09:20:46,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 09:20:46,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 09:20:46,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 09:20:46,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 09:20:45" (1/2) ... [2021-06-13 09:20:46,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de7192a and model type node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 09:20:46, skipping insertion in model container [2021-06-13 09:20:46,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 09:20:46" (2/2) ... [2021-06-13 09:20:46,107 INFO L111 eAbstractionObserver]: Analyzing ICFG node-symm.wvr.bpl [2021-06-13 09:20:46,111 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 09:20:46,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 09:20:46,111 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 09:20:46,165 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-13 09:20:46,180 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-13 09:20:46,206 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 09:20:46,206 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 09:20:46,206 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 09:20:46,206 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 09:20:46,206 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 09:20:46,206 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 09:20:46,206 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 09:20:46,207 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 09:20:46,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-06-13 09:20:46,226 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-06-13 09:20:46,226 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 09:20:46,228 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. [2021-06-13 09:20:46,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-06-13 09:20:46,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-06-13 09:20:46,234 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-13 09:20:46,234 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 09:20:46,235 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:20:46,235 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:20:46,235 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:20:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:20:46,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1913408986, now seen corresponding path program 1 times [2021-06-13 09:20:46,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:20:46,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305270613] [2021-06-13 09:20:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:20:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:20:46,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:20:46,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:20:46,601 INFO L142 QuantifierPusher]: treesize reduction 98, result has 59.5 percent of original size [2021-06-13 09:20:46,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-06-13 09:20:46,753 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-13 09:20:46,802 INFO L142 QuantifierPusher]: treesize reduction 216, result has 33.3 percent of original size [2021-06-13 09:20:46,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-06-13 09:20:46,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:20:46,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:20:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:20:46,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:20:46,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305270613] [2021-06-13 09:20:46,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305270613] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:20:46,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:20:46,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 09:20:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025446063] [2021-06-13 09:20:46,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 09:20:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:20:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 09:20:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 09:20:46,854 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-06-13 09:20:46,856 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) [2021-06-13 09:20:46,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:20:46,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-06-13 09:20:46,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:20:46,936 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 09:20:46,937 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 09:20:46,937 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 24 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. [2021-06-13 09:20:46,939 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 2 selfloop transitions, 1 changer transitions 1/11 dead transitions. [2021-06-13 09:20:46,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 42 flow [2021-06-13 09:20:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-13 09:20:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-13 09:20:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-06-13 09:20:46,948 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2021-06-13 09:20:46,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-06-13 09:20:46,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-06-13 09:20:46,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:20:46,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-06-13 09:20:46,954 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) [2021-06-13 09:20:46,960 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) [2021-06-13 09:20:46,961 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) [2021-06-13 09:20:46,962 INFO L185 Difference]: Start difference. First operand has 17 places, 10 transitions, 32 flow. Second operand 4 states and 45 transitions. [2021-06-13 09:20:46,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 42 flow [2021-06-13 09:20:46,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 34 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 09:20:46,968 INFO L241 Difference]: Finished difference. Result has 18 places, 10 transitions, 31 flow [2021-06-13 09:20:46,970 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} [2021-06-13 09:20:46,970 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-06-13 09:20:46,971 INFO L482 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 31 flow [2021-06-13 09:20:46,971 INFO L483 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) [2021-06-13 09:20:46,971 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 09:20:46,972 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 09:20:46,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 09:20:46,972 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 09:20:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 09:20:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash 540787682, now seen corresponding path program 2 times [2021-06-13 09:20:46,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 09:20:46,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901869836] [2021-06-13 09:20:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 09:20:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 09:20:47,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:20:47,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:20:47,123 INFO L142 QuantifierPusher]: treesize reduction 866, result has 22.1 percent of original size [2021-06-13 09:20:47,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 245 [2021-06-13 09:20:47,262 INFO L142 QuantifierPusher]: treesize reduction 764, result has 15.8 percent of original size [2021-06-13 09:20:47,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-06-13 09:20:47,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 09:20:47,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 09:20:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 09:20:47,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 09:20:47,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901869836] [2021-06-13 09:20:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901869836] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 09:20:47,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 09:20:47,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 09:20:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748725413] [2021-06-13 09:20:47,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 09:20:47,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 09:20:47,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 09:20:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 09:20:47,314 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-06-13 09:20:47,315 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) [2021-06-13 09:20:47,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 09:20:47,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-06-13 09:20:47,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 09:20:47,381 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-13 09:20:47,381 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-06-13 09:20:47,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 11 events. 0/11 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 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. [2021-06-13 09:20:47,382 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-06-13 09:20:47,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 36 flow [2021-06-13 09:20:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-13 09:20:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-13 09:20:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-06-13 09:20:47,382 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 09:20:47,382 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-06-13 09:20:47,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-06-13 09:20:47,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 09:20:47,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-06-13 09:20:47,383 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) [2021-06-13 09:20:47,384 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) [2021-06-13 09:20:47,384 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) [2021-06-13 09:20:47,384 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 31 flow. Second operand 4 states and 44 transitions. [2021-06-13 09:20:47,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 36 flow [2021-06-13 09:20:47,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 34 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 09:20:47,385 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-06-13 09:20:47,385 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} [2021-06-13 09:20:47,385 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2021-06-13 09:20:47,385 INFO L482 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-06-13 09:20:47,385 INFO L483 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) [2021-06-13 09:20:47,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 09:20:47,387 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 09:20:47,389 INFO L202 PluginConnector]: Adding new model node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 09:20:47 BasicIcfg [2021-06-13 09:20:47,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 09:20:47,391 INFO L168 Benchmark]: Toolchain (without parser) took 1565.10 ms. Allocated memory is still 202.4 MB. Free memory was 182.9 MB in the beginning and 176.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 112.9 MB. Max. memory is 8.0 GB. [2021-06-13 09:20:47,391 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.61 ms. Allocated memory is still 202.4 MB. Free memory is still 183.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:20:47,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.96 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-13 09:20:47,392 INFO L168 Benchmark]: Boogie Preprocessor took 14.96 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 180.4 MB in the end (delta: 851.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 09:20:47,392 INFO L168 Benchmark]: RCFGBuilder took 239.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 167.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-13 09:20:47,393 INFO L168 Benchmark]: TraceAbstraction took 1286.08 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 176.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. [2021-06-13 09:20:47,397 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 0.61 ms. Allocated memory is still 202.4 MB. Free memory is still 183.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.96 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.96 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 180.4 MB in the end (delta: 851.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 239.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 167.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1286.08 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 176.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1189.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 193.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 424.0ms 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: 11.2ms SsaConstructionTime, 106.7ms SatisfiabilityAnalysisTime, 752.4ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 525 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...