/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_epsilon_write.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 20:35:12,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 20:35:12,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 20:35:12,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 20:35:12,596 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 [2021-06-05 20:35:12,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 20:35:12,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 20:35:12,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 20:35:12,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 20:35:12,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 20:35:12,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 20:35:12,638 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 20:35:12,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 20:35:12,638 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 20:35:12,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 20:35:12,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 20:35:12,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 20:35:12,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 20:35:12,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 20:35:12,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 20:35:12,640 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 20:35:12,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 20:35:12,640 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 20:35:12,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 20:35:12,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 20:35:12,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 20:35:12,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 20:35:12,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 20:35:12,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:35:12,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 20:35:12,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 20:35:12,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 20:35:12,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 20:35:12,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 20:35:12,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 20:35:12,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 20:35:12,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 20:35:12,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 20:35:12,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 20:35:12,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 20:35:12,976 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 20:35:12,977 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 20:35:12,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl [2021-06-05 20:35:12,978 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl' [2021-06-05 20:35:13,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 20:35:13,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 20:35:13,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 20:35:13,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 20:35:13,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 20:35:13,032 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 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,039 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 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 20:35:13,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 20:35:13,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 20:35:13,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 20:35:13,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/1) ... [2021-06-05 20:35:13,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 20:35:13,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 20:35:13,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 20:35:13,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 20:35:13,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (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 [2021-06-05 20:35:13,127 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 20:35:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 20:35:13,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 20:35:13,128 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-05 20:35:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-05 20:35:13,129 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-05 20:35:13,129 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 20:35:13,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 20:35:13,236 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 20:35:13,238 INFO L202 PluginConnector]: Adding new model example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:35:13 BoogieIcfgContainer [2021-06-05 20:35:13,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 20:35:13,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 20:35:13,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 20:35:13,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 20:35:13,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:13" (1/2) ... [2021-06-05 20:35:13,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df020b5 and model type example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:35:13, skipping insertion in model container [2021-06-05 20:35:13,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:35:13" (2/2) ... [2021-06-05 20:35:13,245 INFO L111 eAbstractionObserver]: Analyzing ICFG example_epsilon_write.bpl [2021-06-05 20:35:13,253 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 20:35:13,253 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 20:35:13,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 20:35:13,255 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 20:35:13,293 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-05 20:35:13,314 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 20:35:13,343 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:35:13,344 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:35:13,344 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:35:13,344 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:35:13,344 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:35:13,344 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:35:13,344 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:35:13,344 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 20:35:13,353 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 9 transitions, 26 flow [2021-06-05 20:35:13,364 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) [2021-06-05 20:35:13,366 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) [2021-06-05 20:35:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 20:35:13,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:13,371 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 20:35:13,372 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1446751537, now seen corresponding path program 1 times [2021-06-05 20:35:13,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:13,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154978617] [2021-06-05 20:35:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:13,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154978617] [2021-06-05 20:35:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154978617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:13,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:13,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:13,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849992439] [2021-06-05 20:35:13,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:13,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:13,548 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-06-05 20:35:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:13,568 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2021-06-05 20:35:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:13,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-06-05 20:35:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:13,595 INFO L225 Difference]: With dead ends: 11 [2021-06-05 20:35:13,596 INFO L226 Difference]: Without dead ends: 7 [2021-06-05 20:35:13,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-06-05 20:35:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-06-05 20:35:13,619 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) [2021-06-05 20:35:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-06-05 20:35:13,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-06-05 20:35:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:13,621 INFO L482 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-06-05 20:35:13,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-06-05 20:35:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-06-05 20:35:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 20:35:13,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:13,622 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 20:35:13,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 20:35:13,623 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1442109907, now seen corresponding path program 2 times [2021-06-05 20:35:13,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:13,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445654812] [2021-06-05 20:35:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:13,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:13,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445654812] [2021-06-05 20:35:13,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445654812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:13,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:13,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 20:35:13,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145911876] [2021-06-05 20:35:13,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:13,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:13,662 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-06-05 20:35:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:13,665 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2021-06-05 20:35:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-06-05 20:35:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:13,666 INFO L225 Difference]: With dead ends: 6 [2021-06-05 20:35:13,666 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 20:35:13,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 20:35:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 20:35:13,667 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) [2021-06-05 20:35:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 20:35:13,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-06-05 20:35:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:13,667 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 20:35:13,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-06-05 20:35:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 20:35:13,668 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:35:13,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 20:35:13,670 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 20:35:13,672 INFO L202 PluginConnector]: Adding new model example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:35:13 BasicIcfg [2021-06-05 20:35:13,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 20:35:13,674 INFO L168 Benchmark]: Toolchain (without parser) took 655.23 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 324.1 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:13,675 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory was 333.2 MB in the beginning and 333.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:35:13,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.47 ms. Allocated memory is still 352.3 MB. Free memory was 332.2 MB in the beginning and 330.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:13,677 INFO L168 Benchmark]: Boogie Preprocessor took 11.11 ms. Allocated memory is still 352.3 MB. Free memory was 330.7 MB in the beginning and 329.9 MB in the end (delta: 827.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:35:13,678 INFO L168 Benchmark]: RCFGBuilder took 177.99 ms. Allocated memory is still 352.3 MB. Free memory was 329.8 MB in the beginning and 321.6 MB in the end (delta: 8.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:13,679 INFO L168 Benchmark]: TraceAbstraction took 431.58 ms. Allocated memory is still 352.3 MB. Free memory was 321.1 MB in the beginning and 324.1 MB in the end (delta: -3.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:35:13,685 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 0.12 ms. Allocated memory is still 352.3 MB. Free memory was 333.2 MB in the beginning and 333.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.47 ms. Allocated memory is still 352.3 MB. Free memory was 332.2 MB in the beginning and 330.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.11 ms. Allocated memory is still 352.3 MB. Free memory was 330.7 MB in the beginning and 329.9 MB in the end (delta: 827.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 177.99 ms. Allocated memory is still 352.3 MB. Free memory was 329.8 MB in the beginning and 321.6 MB in the end (delta: 8.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 431.58 ms. Allocated memory is still 352.3 MB. Free memory was 321.1 MB in the beginning and 324.1 MB in the end (delta: -3.0 MB). There was no memory consumed. 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: 327.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.2ms, AutomataDifference: 71.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 4 SDslu, 2 SDs, 0 SdLazy, 4 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 13.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.5ms SsaConstructionTime, 31.7ms SatisfiabilityAnalysisTime, 71.3ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 20 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...