/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-FA-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:16:02,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:16:02,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:16:02,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 14:16:02,274 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-FA-SemanticLbe.epf [2021-03-11 14:16:02,292 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:16:02,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:16:02,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:16:02,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:16:02,293 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:16:02,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:16:02,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:16:02,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:16:02,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:16:02,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:16:02,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:16:02,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:16:02,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:16:02,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:16:02,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:16:02,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:16:02,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:16:02,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:16:02,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:16:02,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:16:02,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:16:02,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:16:02,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:16:02,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:16:02,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:16:02,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:16:02,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:16:02,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:16:02,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:16:02,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:16:02,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:16:02,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:16:02,548 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:16:02,549 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:16:02,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl [2021-03-11 14:16:02,550 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl' [2021-03-11 14:16:02,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:16:02,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:16:02,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:16:02,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:16:02,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:16:02,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:16:02,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:16:02,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:16:02,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:16:02,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/1) ... [2021-03-11 14:16:02,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:16:02,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:16:02,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:16:02,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:16:02,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (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 14:16:02,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 14:16:02,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:16:02,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:16:02,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-03-11 14:16:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-03-11 14:16:02,654 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-03-11 14:16:02,655 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 14:16:02,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:16:02,753 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 14:16:02,755 INFO L202 PluginConnector]: Adding new model example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:16:02 BoogieIcfgContainer [2021-03-11 14:16:02,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:16:02,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:16:02,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:16:02,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:16:02,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:16:02" (1/2) ... [2021-03-11 14:16:02,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a182f7 and model type example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:16:02, skipping insertion in model container [2021-03-11 14:16:02,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:16:02" (2/2) ... [2021-03-11 14:16:02,763 INFO L111 eAbstractionObserver]: Analyzing ICFG example_epsilon_write.bpl [2021-03-11 14:16:02,768 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:16:02,769 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:16:02,781 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 14:16:02,782 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:16:02,810 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-11 14:16:02,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-11 14:16:02,848 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:16:02,848 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:16:02,848 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:16:02,848 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:16:02,848 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:16:02,848 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:16:02,848 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:16:02,849 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:16:02,858 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:16:02,865 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 13 places, 9 transitions, 26 flow [2021-03-11 14:16:02,868 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 13 places, 9 transitions, 26 flow [2021-03-11 14:16:02,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 9 transitions, 26 flow [2021-03-11 14:16:02,885 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-11 14:16:02,885 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 14:16:02,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 8 events. 0/8 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 14:16:02,887 INFO L116 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-11 14:16:02,945 INFO L131 LiptonReduction]: Checked pairs total: 6 [2021-03-11 14:16:02,946 INFO L133 LiptonReduction]: Total number of compositions: 2 [2021-03-11 14:16:02,951 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 7 transitions, 22 flow [2021-03-11 14:16:02,956 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 14:16:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 14:16:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:16:02,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:16:02,960 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:16:02,960 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:16:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:16:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 46842656, now seen corresponding path program 1 times [2021-03-11 14:16:02,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:16:02,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240171356] [2021-03-11 14:16:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:16:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:16:03,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:16:03,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:16:03,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:16:03,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 14:16:03,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:16:03,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:16:03,066 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 14:16:03,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240171356] [2021-03-11 14:16:03,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:16:03,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:16:03,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566196016] [2021-03-11 14:16:03,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 14:16:03,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:16:03,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 14:16:03,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:16:03,079 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 14:16:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:16:03,105 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2021-03-11 14:16:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 14:16:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2021-03-11 14:16:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:16:03,110 INFO L225 Difference]: With dead ends: 8 [2021-03-11 14:16:03,110 INFO L226 Difference]: Without dead ends: 6 [2021-03-11 14:16:03,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:16:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-03-11 14:16:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-03-11 14:16:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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 14:16:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2021-03-11 14:16:03,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 5 [2021-03-11 14:16:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:16:03,128 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2021-03-11 14:16:03,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 14:16:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2021-03-11 14:16:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:16:03,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:16:03,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:16:03,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:16:03,129 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:16:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:16:03,130 INFO L82 PathProgramCache]: Analyzing trace with hash 46525526, now seen corresponding path program 2 times [2021-03-11 14:16:03,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:16:03,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373143514] [2021-03-11 14:16:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:16:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:16:03,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:16:03,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:16:03,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:16:03,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 14:16:03,148 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 14:16:03,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373143514] [2021-03-11 14:16:03,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:16:03,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:16:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107767178] [2021-03-11 14:16:03,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 14:16:03,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:16:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 14:16:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:16:03,150 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 14:16:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:16:03,152 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2021-03-11 14:16:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 14:16:03,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2021-03-11 14:16:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:16:03,152 INFO L225 Difference]: With dead ends: 5 [2021-03-11 14:16:03,152 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 14:16:03,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:16:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 14:16:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 14:16:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 14:16:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 14:16:03,153 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-03-11 14:16:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:16:03,153 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 14:16:03,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 14:16:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 14:16:03,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 14:16:03,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:16:03,156 INFO L202 PluginConnector]: Adding new model example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:16:03 BasicIcfg [2021-03-11 14:16:03,156 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:16:03,157 INFO L168 Benchmark]: Toolchain (without parser) took 583.27 ms. Allocated memory is still 255.9 MB. Free memory was 237.2 MB in the beginning and 214.7 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.0 GB. [2021-03-11 14:16:03,157 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.1 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:16:03,158 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.56 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:16:03,158 INFO L168 Benchmark]: Boogie Preprocessor took 8.15 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.4 MB in the end (delta: 855.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:16:03,159 INFO L168 Benchmark]: RCFGBuilder took 151.15 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 226.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 14:16:03,159 INFO L168 Benchmark]: TraceAbstraction took 398.78 ms. Allocated memory is still 255.9 MB. Free memory was 226.1 MB in the beginning and 214.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:16:03,161 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.1 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.56 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.15 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.4 MB in the end (delta: 855.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 151.15 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 226.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 398.78 ms. Allocated memory is still 255.9 MB. Free memory was 226.1 MB in the beginning and 214.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 77.9ms, 13 PlacesBefore, 11 PlacesAfterwards, 9 TransitionsBefore, 7 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 6 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 4, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 4, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 2, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - PositiveResult [Line: 16]: 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 2 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 307.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 3.8ms, AutomataDifference: 44.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 107.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 3 SDslu, 2 SDs, 0 SdLazy, 4 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.6ms SsaConstructionTime, 18.7ms SatisfiabilityAnalysisTime, 40.9ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 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...