/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:33:28,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:33:28,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:33:28,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:33:28,725 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 [2021-07-09 17:33:28,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:33:28,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:33:28,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:33:28,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:33:28,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:33:28,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:33:28,766 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:33:28,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:33:28,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:33:28,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:33:28,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:33:28,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:33:28,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:33:28,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:33:28,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:33:28,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:33:28,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:33:28,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:33:28,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:33:28,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:33:28,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:33:28,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:33:28,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:33:28,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:33:28,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:33:28,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:33:28,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:33:28,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:33:28,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:33:28,770 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:33:28,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:33:28,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:33:29,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:33:29,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:33:29,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:33:29,122 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:33:29,125 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:33:29,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl [2021-07-09 17:33:29,126 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl' [2021-07-09 17:33:29,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:33:29,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:33:29,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:33:29,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:33:29,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:33:29,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:33:29,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:33:29,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:33:29,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:33:29,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/1) ... [2021-07-09 17:33:29,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:33:29,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:33:29,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:33:29,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:33:29,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (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 [2021-07-09 17:33:29,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:33:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:33:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:33:29,286 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:33:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:33:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:33:29,286 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:33:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:33:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:33:29,287 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:33:29,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:33:29,417 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:33:29,418 INFO L202 PluginConnector]: Adding new model exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:33:29 BoogieIcfgContainer [2021-07-09 17:33:29,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:33:29,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:33:29,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:33:29,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:33:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:29" (1/2) ... [2021-07-09 17:33:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3439d40 and model type exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:33:29, skipping insertion in model container [2021-07-09 17:33:29,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:33:29" (2/2) ... [2021-07-09 17:33:29,427 INFO L111 eAbstractionObserver]: Analyzing ICFG exp-term-symm.wvr.bpl [2021-07-09 17:33:29,437 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:33:29,437 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:33:29,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:33:29,439 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:33:29,506 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:33:29,536 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:33:29,552 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:33:29,552 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:33:29,552 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:33:29,552 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:33:29,552 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:33:29,553 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:33:29,553 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:33:29,553 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:33:29,560 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 14 transitions, 44 flow [2021-07-09 17:33:29,570 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-07-09 17:33:29,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-07-09 17:33:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:33:29,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:29,578 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:29,578 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash -325733051, now seen corresponding path program 1 times [2021-07-09 17:33:29,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:29,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42447078] [2021-07-09 17:33:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,237 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-07-09 17:33:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42447078] [2021-07-09 17:33:30,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42447078] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:30,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:30,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:33:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512424872] [2021-07-09 17:33:30,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:33:30,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:33:30,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:33:30,291 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-07-09 17:33:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,374 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-07-09 17:33:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:33:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-07-09 17:33:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,381 INFO L225 Difference]: With dead ends: 26 [2021-07-09 17:33:30,382 INFO L226 Difference]: Without dead ends: 14 [2021-07-09 17:33:30,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-07-09 17:33:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-07-09 17:33:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-07-09 17:33:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-07-09 17:33:30,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-07-09 17:33:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,406 INFO L482 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-07-09 17:33:30,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-07-09 17:33:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-07-09 17:33:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:33:30,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:30,407 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:30,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:33:30,408 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -462623471, now seen corresponding path program 2 times [2021-07-09 17:33:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:30,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335677571] [2021-07-09 17:33:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,745 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-07-09 17:33:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335677571] [2021-07-09 17:33:30,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335677571] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:30,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:30,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:33:30,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739277705] [2021-07-09 17:33:30,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:33:30,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:33:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:33:30,773 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-07-09 17:33:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,826 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-07-09 17:33:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:33:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-07-09 17:33:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,826 INFO L225 Difference]: With dead ends: 12 [2021-07-09 17:33:30,826 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:33:30,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:33:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:33:30,828 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) [2021-07-09 17:33:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:33:30,828 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-07-09 17:33:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,828 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:33:30,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-07-09 17:33:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:33:30,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:33:30,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:33:30,830 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:33:30,832 INFO L202 PluginConnector]: Adding new model exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:33:30 BasicIcfg [2021-07-09 17:33:30,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:33:30,834 INFO L168 Benchmark]: Toolchain (without parser) took 1658.35 ms. Allocated memory is still 212.9 MB. Free memory was 192.6 MB in the beginning and 147.3 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:30,834 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 212.9 MB. Free memory is still 193.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:33:30,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.77 ms. Allocated memory is still 212.9 MB. Free memory was 192.6 MB in the beginning and 191.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:30,835 INFO L168 Benchmark]: Boogie Preprocessor took 16.65 ms. Allocated memory is still 212.9 MB. Free memory was 191.0 MB in the beginning and 190.1 MB in the end (delta: 899.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:30,835 INFO L168 Benchmark]: RCFGBuilder took 199.23 ms. Allocated memory is still 212.9 MB. Free memory was 190.1 MB in the beginning and 180.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:30,836 INFO L168 Benchmark]: TraceAbstraction took 1410.94 ms. Allocated memory is still 212.9 MB. Free memory was 180.4 MB in the beginning and 147.3 MB in the end (delta: 33.1 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:30,838 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 212.9 MB. Free memory is still 193.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.77 ms. Allocated memory is still 212.9 MB. Free memory was 192.6 MB in the beginning and 191.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.65 ms. Allocated memory is still 212.9 MB. Free memory was 191.0 MB in the beginning and 190.1 MB in the end (delta: 899.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 199.23 ms. Allocated memory is still 212.9 MB. Free memory was 190.1 MB in the beginning and 180.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1410.94 ms. Allocated memory is still 212.9 MB. Free memory was 180.4 MB in the beginning and 147.3 MB in the end (delta: 33.1 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1279.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.4ms, AutomataDifference: 163.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 14 SDslu, 17 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 633.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 13.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.7ms SsaConstructionTime, 87.1ms SatisfiabilityAnalysisTime, 890.0ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 437 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...