/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 17:09:13,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 17:09:13,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 17:09:13,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 17:09:13,417 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-NoLbe.epf [2021-06-01 17:09:13,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 17:09:13,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 17:09:13,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 17:09:13,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 17:09:13,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 17:09:13,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 17:09:13,456 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 17:09:13,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 17:09:13,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 17:09:13,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 17:09:13,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 17:09:13,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 17:09:13,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 17:09:13,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 17:09:13,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 17:09:13,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 17:09:13,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 17:09:13,459 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 17:09:13,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 17:09:13,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 17:09:13,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 17:09:13,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 17:09:13,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 17:09:13,773 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 17:09:13,775 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 17:09:13,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl [2021-06-01 17:09:13,776 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl' [2021-06-01 17:09:13,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 17:09:13,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 17:09:13,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 17:09:13,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 17:09:13,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 17:09:13,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 17:09:13,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 17:09:13,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 17:09:13,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 17:09:13,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/1) ... [2021-06-01 17:09:13,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 17:09:13,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 17:09:13,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 17:09:13,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 17:09:13,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (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 [2021-06-01 17:09:13,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 17:09:13,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 17:09:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 17:09:13,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-01 17:09:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-01 17:09:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-01 17:09:13,927 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 17:09:14,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 17:09:14,042 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-01 17:09:14,043 INFO L202 PluginConnector]: Adding new model example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 05:09:14 BoogieIcfgContainer [2021-06-01 17:09:14,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 17:09:14,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 17:09:14,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 17:09:14,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 17:09:14,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:09:13" (1/2) ... [2021-06-01 17:09:14,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75920698 and model type example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 05:09:14, skipping insertion in model container [2021-06-01 17:09:14,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 05:09:14" (2/2) ... [2021-06-01 17:09:14,050 INFO L111 eAbstractionObserver]: Analyzing ICFG example_interleaving_simple.bpl [2021-06-01 17:09:14,054 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 17:09:14,055 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 17:09:14,055 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 17:09:14,056 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 17:09:14,075 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-01 17:09:14,091 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-01 17:09:14,108 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 17:09:14,108 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 17:09:14,109 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 17:09:14,109 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 17:09:14,109 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 17:09:14,109 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 17:09:14,109 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 17:09:14,109 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 17:09:14,116 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 9 transitions, 26 flow [2021-06-01 17:09:14,122 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-06-01 17:09:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-06-01 17:09:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-01 17:09:14,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:09:14,129 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-01 17:09:14,130 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:09:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:09:14,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1446751537, now seen corresponding path program 1 times [2021-06-01 17:09:14,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:09:14,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032392266] [2021-06-01 17:09:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:09:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:09:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:09:14,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:09:14,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032392266] [2021-06-01 17:09:14,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032392266] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:09:14,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 17:09:14,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 17:09:14,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250440921] [2021-06-01 17:09:14,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 17:09:14,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:09:14,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 17:09:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:09:14,398 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-06-01 17:09:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:09:14,457 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-06-01 17:09:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 17:09:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-06-01 17:09:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:09:14,465 INFO L225 Difference]: With dead ends: 14 [2021-06-01 17:09:14,465 INFO L226 Difference]: Without dead ends: 7 [2021-06-01 17:09:14,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:09:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-06-01 17:09:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-06-01 17:09:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-06-01 17:09:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-06-01 17:09:14,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-06-01 17:09:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:09:14,488 INFO L482 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-06-01 17:09:14,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-06-01 17:09:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-06-01 17:09:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-01 17:09:14,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:09:14,489 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-01 17:09:14,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 17:09:14,489 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:09:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:09:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1442109907, now seen corresponding path program 2 times [2021-06-01 17:09:14,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:09:14,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190393017] [2021-06-01 17:09:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:09:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:09:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:09:14,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:09:14,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190393017] [2021-06-01 17:09:14,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190393017] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:09:14,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 17:09:14,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 17:09:14,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531032907] [2021-06-01 17:09:14,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 17:09:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:09:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 17:09:14,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:09:14,527 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-06-01 17:09:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:09:14,554 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2021-06-01 17:09:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 17:09:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-06-01 17:09:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:09:14,554 INFO L225 Difference]: With dead ends: 6 [2021-06-01 17:09:14,554 INFO L226 Difference]: Without dead ends: 0 [2021-06-01 17:09:14,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:09:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-01 17:09:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-01 17:09:14,556 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) [2021-06-01 17:09:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-01 17:09:14,556 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-06-01 17:09:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:09:14,556 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-01 17:09:14,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-06-01 17:09:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-01 17:09:14,557 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-01 17:09:14,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-01 17:09:14,559 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 17:09:14,561 INFO L202 PluginConnector]: Adding new model example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 05:09:14 BasicIcfg [2021-06-01 17:09:14,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 17:09:14,577 INFO L168 Benchmark]: Toolchain (without parser) took 752.17 ms. Allocated memory is still 358.6 MB. Free memory was 339.0 MB in the beginning and 323.0 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.0 GB. [2021-06-01 17:09:14,578 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 358.6 MB. Free memory was 340.0 MB in the beginning and 339.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 17:09:14,579 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.97 ms. Allocated memory is still 358.6 MB. Free memory was 338.9 MB in the beginning and 337.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-01 17:09:14,579 INFO L168 Benchmark]: Boogie Preprocessor took 11.40 ms. Allocated memory is still 358.6 MB. Free memory was 337.4 MB in the beginning and 336.6 MB in the end (delta: 826.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 17:09:14,580 INFO L168 Benchmark]: RCFGBuilder took 194.89 ms. Allocated memory is still 358.6 MB. Free memory was 336.5 MB in the beginning and 328.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-01 17:09:14,581 INFO L168 Benchmark]: TraceAbstraction took 515.95 ms. Allocated memory is still 358.6 MB. Free memory was 328.1 MB in the beginning and 323.0 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.0 GB. [2021-06-01 17:09:14,583 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 0.14 ms. Allocated memory is still 358.6 MB. Free memory was 340.0 MB in the beginning and 339.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.97 ms. Allocated memory is still 358.6 MB. Free memory was 338.9 MB in the beginning and 337.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.40 ms. Allocated memory is still 358.6 MB. Free memory was 337.4 MB in the beginning and 336.6 MB in the end (delta: 826.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 194.89 ms. Allocated memory is still 358.6 MB. Free memory was 336.5 MB in the beginning and 328.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 515.95 ms. Allocated memory is still 358.6 MB. Free memory was 328.1 MB in the beginning and 323.0 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 3 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 451.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.8ms, AutomataDifference: 125.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 13 SDslu, 7 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 12.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.8ms SsaConstructionTime, 20.6ms SatisfiabilityAnalysisTime, 179.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 68 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...