/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d9e330d [2020-02-10 20:40:01,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-02-10 20:40:01,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-02-10 20:40:01,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-02-10 20:40:01,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-02-10 20:40:01,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-02-10 20:40:01,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-02-10 20:40:01,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-02-10 20:40:01,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-02-10 20:40:01,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-02-10 20:40:01,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-02-10 20:40:01,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-02-10 20:40:01,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-02-10 20:40:01,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-02-10 20:40:01,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-02-10 20:40:01,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-02-10 20:40:01,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-02-10 20:40:01,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-02-10 20:40:01,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-02-10 20:40:01,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-02-10 20:40:01,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-02-10 20:40:01,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-02-10 20:40:01,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-02-10 20:40:01,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-02-10 20:40:01,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-02-10 20:40:01,289 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-VariableLbe.epf [2020-02-10 20:40:01,303 INFO L113 SettingsManager]: Loading preferences was successful [2020-02-10 20:40:01,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-02-10 20:40:01,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-02-10 20:40:01,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-02-10 20:40:01,305 INFO L138 SettingsManager]: * Use SBE=true [2020-02-10 20:40:01,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-02-10 20:40:01,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-02-10 20:40:01,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-02-10 20:40:01,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-02-10 20:40:01,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-02-10 20:40:01,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-02-10 20:40:01,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-02-10 20:40:01,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-02-10 20:40:01,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-02-10 20:40:01,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-02-10 20:40:01,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-02-10 20:40:01,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-02-10 20:40:01,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-02-10 20:40:01,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-02-10 20:40:01,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-02-10 20:40:01,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-02-10 20:40:01,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-10 20:40:01,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-02-10 20:40:01,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-02-10 20:40:01,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-02-10 20:40:01,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-02-10 20:40:01,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-02-10 20:40:01,310 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-02-10 20:40:01,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-02-10 20:40:01,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-02-10 20:40:01,618 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-02-10 20:40:01,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-02-10 20:40:01,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-02-10 20:40:01,647 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-02-10 20:40:01,650 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-02-10 20:40:01,651 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-02-10 20:40:01,652 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-02-10 20:40:01,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-02-10 20:40:01,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-02-10 20:40:01,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-02-10 20:40:01,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-02-10 20:40:01,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-02-10 20:40:01,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-02-10 20:40:01,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-02-10 20:40:01,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-02-10 20:40:01,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-02-10 20:40:01,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/1) ... [2020-02-10 20:40:01,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-02-10 20:40:01,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-02-10 20:40:01,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-02-10 20:40:01,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-02-10 20:40:01,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (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 [2020-02-10 20:40:01,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-02-10 20:40:01,833 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-02-10 20:40:01,835 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-02-10 20:40:01,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-02-10 20:40:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-02-10 20:40:01,836 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-02-10 20:40:01,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-02-10 20:40:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-02-10 20:40:01,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-02-10 20:40:01,838 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-02-10 20:40:01,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-02-10 20:40:01,967 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-02-10 20:40:01,971 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 08:40:01 BoogieIcfgContainer [2020-02-10 20:40:01,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-02-10 20:40:01,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-02-10 20:40:01,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-02-10 20:40:01,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-02-10 20:40:01,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 08:40:01" (1/2) ... [2020-02-10 20:40:01,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d16b3 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 08:40:01, skipping insertion in model container [2020-02-10 20:40:01,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 08:40:01" (2/2) ... [2020-02-10 20:40:01,984 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-02-10 20:40:01,994 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-02-10 20:40:01,994 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-02-10 20:40:02,001 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-02-10 20:40:02,002 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-02-10 20:40:02,058 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-02-10 20:40:02,079 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-02-10 20:40:02,080 INFO L376 AbstractCegarLoop]: Hoare is true [2020-02-10 20:40:02,080 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-02-10 20:40:02,080 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-02-10 20:40:02,080 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-02-10 20:40:02,080 INFO L380 AbstractCegarLoop]: Difference is false [2020-02-10 20:40:02,081 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-02-10 20:40:02,081 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-02-10 20:40:02,093 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions [2020-02-10 20:40:02,095 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-02-10 20:40:02,123 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-02-10 20:40:02,123 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-10 20:40:02,134 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-02-10 20:40:02,138 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-02-10 20:40:02,150 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-02-10 20:40:02,150 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-10 20:40:02,153 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-02-10 20:40:02,155 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 20 [2020-02-10 20:40:02,157 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-02-10 20:40:02,230 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7 [2020-02-10 20:40:02,231 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-02-10 20:40:02,235 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 12 transitions [2020-02-10 20:40:02,249 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 14 states. [2020-02-10 20:40:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-02-10 20:40:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-02-10 20:40:02,266 INFO L407 BasicCegarLoop]: Found error trace [2020-02-10 20:40:02,268 INFO L415 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-02-10 20:40:02,268 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 20:40:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 20:40:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 994080250, now seen corresponding path program 1 times [2020-02-10 20:40:02,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 20:40:02,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971620486] [2020-02-10 20:40:02,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 20:40:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 20:40:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 20:40:02,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971620486] [2020-02-10 20:40:02,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 20:40:02,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 20:40:02,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677123472] [2020-02-10 20:40:02,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-02-10 20:40:02,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 20:40:02,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-02-10 20:40:02,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-02-10 20:40:02,621 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-02-10 20:40:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-02-10 20:40:02,688 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-02-10 20:40:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-02-10 20:40:02,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-02-10 20:40:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-02-10 20:40:02,701 INFO L225 Difference]: With dead ends: 18 [2020-02-10 20:40:02,701 INFO L226 Difference]: Without dead ends: 10 [2020-02-10 20:40:02,705 INFO L633 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-02-10 20:40:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-02-10 20:40:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-02-10 20:40:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-02-10 20:40:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-02-10 20:40:02,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-02-10 20:40:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-02-10 20:40:02,758 INFO L479 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-02-10 20:40:02,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-02-10 20:40:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-02-10 20:40:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-02-10 20:40:02,760 INFO L407 BasicCegarLoop]: Found error trace [2020-02-10 20:40:02,760 INFO L415 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-02-10 20:40:02,760 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 20:40:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 20:40:02,762 INFO L82 PathProgramCache]: Analyzing trace with hash 798353380, now seen corresponding path program 2 times [2020-02-10 20:40:02,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 20:40:02,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451419517] [2020-02-10 20:40:02,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 20:40:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 20:40:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 20:40:02,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451419517] [2020-02-10 20:40:02,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 20:40:02,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 20:40:02,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741789927] [2020-02-10 20:40:02,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-02-10 20:40:02,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 20:40:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-02-10 20:40:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-02-10 20:40:02,874 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-02-10 20:40:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-02-10 20:40:02,903 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-02-10 20:40:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-02-10 20:40:02,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-02-10 20:40:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-02-10 20:40:02,904 INFO L225 Difference]: With dead ends: 9 [2020-02-10 20:40:02,904 INFO L226 Difference]: Without dead ends: 0 [2020-02-10 20:40:02,905 INFO L633 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-02-10 20:40:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-02-10 20:40:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-02-10 20:40:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-02-10 20:40:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-02-10 20:40:02,907 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-02-10 20:40:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-02-10 20:40:02,907 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-02-10 20:40:02,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-02-10 20:40:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-02-10 20:40:02,907 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-02-10 20:40:02,912 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 08:40:02 BasicIcfg [2020-02-10 20:40:02,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-02-10 20:40:02,914 INFO L168 Benchmark]: Toolchain (without parser) took 1226.70 ms. Allocated memory is still 135.8 MB. Free memory was 117.7 MB in the beginning and 65.3 MB in the end (delta: 52.4 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. [2020-02-10 20:40:02,916 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.52 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-02-10 20:40:02,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.34 ms. Allocated memory is still 135.8 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-02-10 20:40:02,918 INFO L168 Benchmark]: Boogie Preprocessor took 21.19 ms. Allocated memory is still 135.8 MB. Free memory was 115.8 MB in the beginning and 114.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-02-10 20:40:02,919 INFO L168 Benchmark]: RCFGBuilder took 224.94 ms. Allocated memory is still 135.8 MB. Free memory was 114.7 MB in the beginning and 105.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-02-10 20:40:02,920 INFO L168 Benchmark]: TraceAbstraction took 934.91 ms. Allocated memory is still 135.8 MB. Free memory was 104.7 MB in the beginning and 65.3 MB in the end (delta: 39.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2020-02-10 20:40:02,924 INFO L336 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 0.52 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.34 ms. Allocated memory is still 135.8 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.19 ms. Allocated memory is still 135.8 MB. Free memory was 115.8 MB in the beginning and 114.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 224.94 ms. Allocated memory is still 135.8 MB. Free memory was 114.7 MB in the beginning and 105.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 934.91 ms. Allocated memory is still 135.8 MB. Free memory was 104.7 MB in the beginning and 65.3 MB in the end (delta: 39.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.1s, 20 ProgramPointsBefore, 17 ProgramPointsAfterwards, 15 TransitionsBefore, 12 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 VarBasedMoverChecksPositive, 0 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 7 CheckedPairsTotal, 3 TotalNumberOfCompositions - PositiveResult [Line: 17]: 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, 14 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 21 SDtfs, 21 SDslu, 17 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 432 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...