/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/showcase/Bakery.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:41:40,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:41:40,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:41:40,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:41:40,609 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 [2021-03-10 20:41:40,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:41:40,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:41:40,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:41:40,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:41:40,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:41:40,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:41:40,624 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:41:40,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:41:40,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:41:40,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:41:40,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:41:40,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:41:40,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:41:40,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:41:40,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:41:40,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:41:40,876 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:41:40,876 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:41:40,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl [2021-03-10 20:41:40,900 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl' [2021-03-10 20:41:41,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:41:41,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:41:41,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:41,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:41:41,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:41:41,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:41,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:41:41,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:41:41,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:41:41,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... [2021-03-10 20:41:41,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:41:41,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:41:41,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:41:41,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:41:41,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:41:41,080 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-03-10 20:41:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-03-10 20:41:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-03-10 20:41:41,080 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-03-10 20:41:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-03-10 20:41:41,081 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-03-10 20:41:41,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:41:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:41:41,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:41:41,081 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:41:41,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:41:41,182 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 20:41:41,183 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:41 BoogieIcfgContainer [2021-03-10 20:41:41,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:41:41,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:41:41,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:41:41,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:41:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:41" (1/2) ... [2021-03-10 20:41:41,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173fef1b and model type Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:41:41, skipping insertion in model container [2021-03-10 20:41:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:41" (2/2) ... [2021-03-10 20:41:41,196 INFO L111 eAbstractionObserver]: Analyzing ICFG Bakery.bpl [2021-03-10 20:41:41,199 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:41:41,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:41:41,201 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-10 20:41:41,202 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:41:41,217 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:41:41,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-10 20:41:41,238 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:41:41,239 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:41:41,239 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:41:41,239 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:41:41,239 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:41:41,239 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:41:41,239 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:41:41,239 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:41:41,244 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 62 flow [2021-03-10 20:41:41,257 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 175 states, 171 states have (on average 2.497076023391813) internal successors, (427), 174 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 171 states have (on average 2.497076023391813) internal successors, (427), 174 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:41:41,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:41,262 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:41,262 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1948731573, now seen corresponding path program 1 times [2021-03-10 20:41:41,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:41,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924805191] [2021-03-10 20:41:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924805191] [2021-03-10 20:41:41,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:41,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 20:41:41,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364532210] [2021-03-10 20:41:41,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:41,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:41,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:41,404 INFO L87 Difference]: Start difference. First operand has 175 states, 171 states have (on average 2.497076023391813) internal successors, (427), 174 states have internal predecessors, (427), 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 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:41,469 INFO L93 Difference]: Finished difference Result 204 states and 488 transitions. [2021-03-10 20:41:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-03-10 20:41:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:41,486 INFO L225 Difference]: With dead ends: 204 [2021-03-10 20:41:41,486 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 20:41:41,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 20:41:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-03-10 20:41:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 190 states have (on average 2.473684210526316) internal successors, (470), 191 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 470 transitions. [2021-03-10 20:41:41,556 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 470 transitions. Word has length 7 [2021-03-10 20:41:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:41,557 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 470 transitions. [2021-03-10 20:41:41,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 470 transitions. [2021-03-10 20:41:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:41:41,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:41,557 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:41,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:41:41,558 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash 281769241, now seen corresponding path program 1 times [2021-03-10 20:41:41,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:41,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529739905] [2021-03-10 20:41:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:41,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529739905] [2021-03-10 20:41:41,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:41,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-10 20:41:41,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526260398] [2021-03-10 20:41:41,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:41:41,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:41:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:41,588 INFO L87 Difference]: Start difference. First operand 192 states and 470 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:41,618 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2021-03-10 20:41:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:41:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-03-10 20:41:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:41,622 INFO L225 Difference]: With dead ends: 216 [2021-03-10 20:41:41,622 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 20:41:41,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:41,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 20:41:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2021-03-10 20:41:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.283582089552239) internal successors, (459), 201 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 459 transitions. [2021-03-10 20:41:41,630 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 459 transitions. Word has length 8 [2021-03-10 20:41:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:41,630 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 459 transitions. [2021-03-10 20:41:41,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 459 transitions. [2021-03-10 20:41:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:41:41,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:41,631 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:41,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:41:41,631 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash 391474269, now seen corresponding path program 1 times [2021-03-10 20:41:41,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:41,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360007702] [2021-03-10 20:41:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:41,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360007702] [2021-03-10 20:41:41,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:41,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:41:41,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051173931] [2021-03-10 20:41:41,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:41:41,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:41:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:41:41,687 INFO L87 Difference]: Start difference. First operand 202 states and 459 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-03-10 20:41:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:41,728 INFO L93 Difference]: Finished difference Result 258 states and 565 transitions. [2021-03-10 20:41:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 20:41:41,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) Word has length 12 [2021-03-10 20:41:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:41,730 INFO L225 Difference]: With dead ends: 258 [2021-03-10 20:41:41,730 INFO L226 Difference]: Without dead ends: 258 [2021-03-10 20:41:41,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:41:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-03-10 20:41:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 240. [2021-03-10 20:41:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.2343096234309625) internal successors, (534), 239 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 534 transitions. [2021-03-10 20:41:41,752 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 534 transitions. Word has length 12 [2021-03-10 20:41:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:41,752 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 534 transitions. [2021-03-10 20:41:41,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-03-10 20:41:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 534 transitions. [2021-03-10 20:41:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:41:41,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:41,753 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:41,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:41:41,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:41,754 INFO L82 PathProgramCache]: Analyzing trace with hash 630687597, now seen corresponding path program 2 times [2021-03-10 20:41:41,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:41,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219735751] [2021-03-10 20:41:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:41,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219735751] [2021-03-10 20:41:41,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:41,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:41:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794338083] [2021-03-10 20:41:41,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:41:41,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:41:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:41:41,795 INFO L87 Difference]: Start difference. First operand 240 states and 534 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-03-10 20:41:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:41,836 INFO L93 Difference]: Finished difference Result 306 states and 665 transitions. [2021-03-10 20:41:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:41:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) Word has length 12 [2021-03-10 20:41:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:41,837 INFO L225 Difference]: With dead ends: 306 [2021-03-10 20:41:41,838 INFO L226 Difference]: Without dead ends: 306 [2021-03-10 20:41:41,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:41:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-03-10 20:41:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 258. [2021-03-10 20:41:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.252918287937743) internal successors, (579), 257 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 579 transitions. [2021-03-10 20:41:41,844 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 579 transitions. Word has length 12 [2021-03-10 20:41:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:41,844 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 579 transitions. [2021-03-10 20:41:41,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-03-10 20:41:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 579 transitions. [2021-03-10 20:41:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 20:41:41,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:41,849 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:41,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:41:41,849 INFO L428 AbstractCegarLoop]: === Iteration 5 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -826400076, now seen corresponding path program 1 times [2021-03-10 20:41:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:41,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984454555] [2021-03-10 20:41:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984454555] [2021-03-10 20:41:41,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:41,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:41:41,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659379959] [2021-03-10 20:41:41,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 20:41:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 20:41:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:41:41,912 INFO L87 Difference]: Start difference. First operand 258 states and 579 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:41,950 INFO L93 Difference]: Finished difference Result 202 states and 435 transitions. [2021-03-10 20:41:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 20:41:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-03-10 20:41:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:41,952 INFO L225 Difference]: With dead ends: 202 [2021-03-10 20:41:41,952 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 20:41:41,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:41:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 20:41:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2021-03-10 20:41:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 162 states have (on average 2.191358024691358) internal successors, (355), 161 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 355 transitions. [2021-03-10 20:41:41,957 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 355 transitions. Word has length 18 [2021-03-10 20:41:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:41,958 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 355 transitions. [2021-03-10 20:41:41,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 355 transitions. [2021-03-10 20:41:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 20:41:41,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:41,958 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:41,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:41:41,959 INFO L428 AbstractCegarLoop]: === Iteration 6 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash 828911154, now seen corresponding path program 2 times [2021-03-10 20:41:41,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:41,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205032396] [2021-03-10 20:41:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205032396] [2021-03-10 20:41:42,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:42,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:41:42,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466556680] [2021-03-10 20:41:42,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:41:42,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:42,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:41:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:41:42,005 INFO L87 Difference]: Start difference. First operand 162 states and 355 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:42,030 INFO L93 Difference]: Finished difference Result 206 states and 435 transitions. [2021-03-10 20:41:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:41:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-03-10 20:41:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:42,031 INFO L225 Difference]: With dead ends: 206 [2021-03-10 20:41:42,031 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 20:41:42,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:41:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 20:41:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2021-03-10 20:41:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-03-10 20:41:42,036 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 18 [2021-03-10 20:41:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:42,036 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-03-10 20:41:42,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-03-10 20:41:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 20:41:42,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:42,037 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:42,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 20:41:42,037 INFO L428 AbstractCegarLoop]: === Iteration 7 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:41:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1459335517, now seen corresponding path program 1 times [2021-03-10 20:41:42,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751801908] [2021-03-10 20:41:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:42,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751801908] [2021-03-10 20:41:42,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:42,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:41:42,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521329177] [2021-03-10 20:41:42,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 20:41:42,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 20:41:42,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:41:42,095 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:42,127 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2021-03-10 20:41:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 20:41:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 24 [2021-03-10 20:41:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:42,127 INFO L225 Difference]: With dead ends: 132 [2021-03-10 20:41:42,127 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 20:41:42,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:41:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 20:41:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 20:41:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 20:41:42,128 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-03-10 20:41:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:42,128 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 20:41:42,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 20:41:42,128 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 20:41:42,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 20:41:42,132 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:41:42 BasicIcfg [2021-03-10 20:41:42,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:41:42,133 INFO L168 Benchmark]: Toolchain (without parser) took 1130.45 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 236.7 MB in the beginning and 307.5 MB in the end (delta: -70.9 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:42,133 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:42,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.51 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:42,135 INFO L168 Benchmark]: Boogie Preprocessor took 9.17 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 933.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:42,136 INFO L168 Benchmark]: RCFGBuilder took 148.26 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 223.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:42,138 INFO L168 Benchmark]: TraceAbstraction took 940.12 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 241.4 MB in the beginning and 307.5 MB in the end (delta: -66.2 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:42,139 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.51 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.17 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 933.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 148.26 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 223.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 940.12 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 241.4 MB in the beginning and 307.5 MB in the end (delta: -66.2 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 53]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 891.7ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 11.7ms, AutomataDifference: 319.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 187 SDtfs, 229 SDslu, 227 SDs, 0 SdLazy, 138 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 149.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=258occurred in iteration=4, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 100.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 178 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.6ms SsaConstructionTime, 50.8ms SatisfiabilityAnalysisTime, 278.8ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 242 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 13/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...