/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:03:05,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:03:05,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:03:05,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:03:05,700 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-Separate.epf [2021-06-05 13:03:05,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:03:05,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:03:05,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:03:05,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:03:05,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:03:05,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:03:05,724 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:03:05,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:03:05,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:03:05,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:03:05,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:03:05,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:03:05,727 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:03:05,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:03:05,727 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:03:05,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:03:05,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:03:05,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:03:05,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:03:05,979 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:03:05,980 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:03:05,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl [2021-06-05 13:03:05,981 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl' [2021-06-05 13:03:06,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:03:06,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:03:06,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:03:06,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:03:06,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:03:06,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:03:06,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:03:06,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:03:06,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:03:06,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... [2021-06-05 13:03:06,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:03:06,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:03:06,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:03:06,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:03:06,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:03:06,100 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:03:06,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:03:06,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:03:06,100 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 13:03:06,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 13:03:06,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 13:03:06,101 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:03:06,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:03:06,183 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:03:06,184 INFO L202 PluginConnector]: Adding new model fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:03:06 BoogieIcfgContainer [2021-06-05 13:03:06,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:03:06,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:03:06,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:03:06,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:03:06,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:03:06" (1/2) ... [2021-06-05 13:03:06,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e75befa and model type fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:03:06, skipping insertion in model container [2021-06-05 13:03:06,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:03:06" (2/2) ... [2021-06-05 13:03:06,189 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_mutex.bpl [2021-06-05 13:03:06,192 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:03:06,193 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:03:06,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:03:06,193 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:03:06,208 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:03:06,223 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 13:03:06,236 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:06,236 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:06,236 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:06,237 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:06,237 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:06,237 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:06,237 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:06,237 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:03:06,242 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-06-05 13:03:06,249 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:06,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:06,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:06,254 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:06,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993, now seen corresponding path program 1 times [2021-06-05 13:03:06,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:06,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809337822] [2021-06-05 13:03:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:06,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:06,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809337822] [2021-06-05 13:03:06,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809337822] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:06,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:06,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:03:06,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736957935] [2021-06-05 13:03:06,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:03:06,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:03:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:06,416 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:06,442 INFO L93 Difference]: Finished difference Result 15 states and 23 transitions. [2021-06-05 13:03:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:03:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:03:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:06,469 INFO L225 Difference]: With dead ends: 15 [2021-06-05 13:03:06,469 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:03:06,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:03:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:03:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:03:06,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2021-06-05 13:03:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:06,500 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:03:06,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:03:06,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:03:06,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:03:06,502 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:03:06,503 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:03:06,504 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:06,504 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:06,505 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:06,505 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:06,505 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:06,505 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:06,505 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:06,505 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:03:06,505 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-06-05 13:03:06,506 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-06-05 13:03:06,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:06,507 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-06-05 13:03:06,507 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:03:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 45133, now seen corresponding path program 1 times [2021-06-05 13:03:06,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:06,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314103492] [2021-06-05 13:03:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:06,527 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:06,529 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:06,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:03:06,537 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:03:06,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:03:06,537 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:03:06,538 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:03:06,538 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 13:03:06,543 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:03:06,544 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:03:06,545 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:06,545 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:06,545 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:06,545 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:06,545 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:06,545 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:06,545 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:06,545 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:03:06,546 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-06-05 13:03:06,552 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:06,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:06,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:06,553 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1865558, now seen corresponding path program 1 times [2021-06-05 13:03:06,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:06,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143174565] [2021-06-05 13:03:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:06,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:06,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143174565] [2021-06-05 13:03:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143174565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:06,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:06,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:03:06,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110283291] [2021-06-05 13:03:06,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:03:06,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:03:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:06,586 INFO L87 Difference]: Start difference. First operand has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:06,654 INFO L93 Difference]: Finished difference Result 194 states and 489 transitions. [2021-06-05 13:03:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:03:06,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:03:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:06,660 INFO L225 Difference]: With dead ends: 194 [2021-06-05 13:03:06,660 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 13:03:06,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 13:03:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 146. [2021-06-05 13:03:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 2.742857142857143) internal successors, (384), 145 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 384 transitions. [2021-06-05 13:03:06,694 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 384 transitions. Word has length 4 [2021-06-05 13:03:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:06,694 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 384 transitions. [2021-06-05 13:03:06,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 384 transitions. [2021-06-05 13:03:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:03:06,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:06,695 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:06,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:03:06,695 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash 943070893, now seen corresponding path program 1 times [2021-06-05 13:03:06,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:06,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579912182] [2021-06-05 13:03:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:03:06,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:06,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579912182] [2021-06-05 13:03:06,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579912182] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:06,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:06,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:03:06,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687703969] [2021-06-05 13:03:06,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:03:06,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:03:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:06,727 INFO L87 Difference]: Start difference. First operand 146 states and 384 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:06,765 INFO L93 Difference]: Finished difference Result 95 states and 248 transitions. [2021-06-05 13:03:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:03:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-06-05 13:03:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:06,768 INFO L225 Difference]: With dead ends: 95 [2021-06-05 13:03:06,768 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:03:06,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:03:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:03:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:03:06,769 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-06-05 13:03:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:06,769 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:03:06,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:03:06,770 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:03:06,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:03:06,770 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:03:06,770 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:03:06,771 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:06,771 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:06,771 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:06,771 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:06,771 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:06,771 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:06,772 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:06,772 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:03:06,772 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-06-05 13:03:06,776 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 77 states have (on average 2.896103896103896) internal successors, (223), 87 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:06,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:06,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:06,777 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:03:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1865938, now seen corresponding path program 1 times [2021-06-05 13:03:06,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:06,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574174099] [2021-06-05 13:03:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:06,780 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:06,792 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:06,793 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:03:06,794 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:03:06,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:03:06,794 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:03:06,794 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:03:06,794 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 13:03:06,800 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:03:06,800 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:03:06,801 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:06,801 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:06,801 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:06,801 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:06,801 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:06,801 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:06,801 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:06,801 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:03:06,802 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-06-05 13:03:06,822 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:06,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:06,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:06,828 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2517147, now seen corresponding path program 1 times [2021-06-05 13:03:06,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:06,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256800878] [2021-06-05 13:03:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:06,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256800878] [2021-06-05 13:03:06,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256800878] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:06,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:06,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:03:06,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732471898] [2021-06-05 13:03:06,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:03:06,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:06,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:03:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:06,850 INFO L87 Difference]: Start difference. First operand has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:06,912 INFO L93 Difference]: Finished difference Result 1150 states and 3931 transitions. [2021-06-05 13:03:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:03:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:03:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:06,940 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 13:03:06,940 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 13:03:06,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 13:03:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1025. [2021-06-05 13:03:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1008 states have (on average 3.6101190476190474) internal successors, (3639), 1024 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3639 transitions. [2021-06-05 13:03:07,081 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3639 transitions. Word has length 4 [2021-06-05 13:03:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:07,081 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3639 transitions. [2021-06-05 13:03:07,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3639 transitions. [2021-06-05 13:03:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:03:07,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:07,086 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:07,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:03:07,087 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1064058921, now seen corresponding path program 1 times [2021-06-05 13:03:07,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:07,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249783994] [2021-06-05 13:03:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:07,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:07,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249783994] [2021-06-05 13:03:07,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249783994] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:07,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:07,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:03:07,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397459610] [2021-06-05 13:03:07,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:03:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:03:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:07,125 INFO L87 Difference]: Start difference. First operand 1025 states and 3639 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:07,191 INFO L93 Difference]: Finished difference Result 1734 states and 5933 transitions. [2021-06-05 13:03:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:03:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-06-05 13:03:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:07,202 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 13:03:07,202 INFO L226 Difference]: Without dead ends: 1452 [2021-06-05 13:03:07,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-06-05 13:03:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 890. [2021-06-05 13:03:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 876 states have (on average 3.5114155251141552) internal successors, (3076), 889 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3076 transitions. [2021-06-05 13:03:07,240 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3076 transitions. Word has length 8 [2021-06-05 13:03:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:07,240 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3076 transitions. [2021-06-05 13:03:07,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3076 transitions. [2021-06-05 13:03:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:03:07,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:07,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:07,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:03:07,242 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash 671599799, now seen corresponding path program 1 times [2021-06-05 13:03:07,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:07,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608467272] [2021-06-05 13:03:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:07,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:07,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608467272] [2021-06-05 13:03:07,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608467272] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:07,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:07,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:03:07,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935998533] [2021-06-05 13:03:07,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:03:07,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:07,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:03:07,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:03:07,272 INFO L87 Difference]: Start difference. First operand 890 states and 3076 transitions. Second operand has 6 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) [2021-06-05 13:03:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:07,314 INFO L93 Difference]: Finished difference Result 419 states and 1511 transitions. [2021-06-05 13:03:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:03:07,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 [2021-06-05 13:03:07,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:07,315 INFO L225 Difference]: With dead ends: 419 [2021-06-05 13:03:07,315 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:03:07,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:03:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:03:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:03:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:03:07,316 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-06-05 13:03:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:07,316 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:03:07,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 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) [2021-06-05 13:03:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:03:07,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:03:07,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:03:07,316 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:03:07,317 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:03:07,317 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:07,317 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:07,317 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:07,317 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:07,317 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:07,317 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:07,318 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:07,318 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:03:07,318 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-06-05 13:03:07,327 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 415 states have (on average 3.730120481927711) internal successors, (1548), 437 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 13:03:07,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:07,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 13:03:07,329 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:03:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash 78038544, now seen corresponding path program 1 times [2021-06-05 13:03:07,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:07,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064371686] [2021-06-05 13:03:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:07,333 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:07,334 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:07,335 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:03:07,335 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:03:07,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:03:07,335 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:03:07,335 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:03:07,335 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 13:03:07,341 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:03:07,342 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 13:03:07,342 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:07,342 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:07,342 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:07,342 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:07,343 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:07,343 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:07,343 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:07,343 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:03:07,343 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-06-05 13:03:07,433 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:07,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:07,439 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:07,439 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash 3352960, now seen corresponding path program 1 times [2021-06-05 13:03:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:07,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965028810] [2021-06-05 13:03:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:07,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:07,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965028810] [2021-06-05 13:03:07,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965028810] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:07,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:07,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:03:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6644156] [2021-06-05 13:03:07,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:03:07,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:03:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:07,458 INFO L87 Difference]: Start difference. First operand has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:07,562 INFO L93 Difference]: Finished difference Result 6142 states and 26589 transitions. [2021-06-05 13:03:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:03:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:03:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:07,600 INFO L225 Difference]: With dead ends: 6142 [2021-06-05 13:03:07,600 INFO L226 Difference]: Without dead ends: 6075 [2021-06-05 13:03:07,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2021-06-05 13:03:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 5811. [2021-06-05 13:03:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5811 states, 5771 states have (on average 4.470455726910414) internal successors, (25799), 5810 states have internal predecessors, (25799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 25799 transitions. [2021-06-05 13:03:07,838 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 25799 transitions. Word has length 4 [2021-06-05 13:03:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:07,839 INFO L482 AbstractCegarLoop]: Abstraction has 5811 states and 25799 transitions. [2021-06-05 13:03:07,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 25799 transitions. [2021-06-05 13:03:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:03:07,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:07,842 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:07,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:03:07,842 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:07,843 INFO L82 PathProgramCache]: Analyzing trace with hash -125637173, now seen corresponding path program 1 times [2021-06-05 13:03:07,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:07,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422727219] [2021-06-05 13:03:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:07,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422727219] [2021-06-05 13:03:07,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422727219] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:07,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:07,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:03:07,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269188781] [2021-06-05 13:03:07,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:03:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:03:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:07,879 INFO L87 Difference]: Start difference. First operand 5811 states and 25799 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:08,062 INFO L93 Difference]: Finished difference Result 11747 states and 49988 transitions. [2021-06-05 13:03:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:03:08,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-06-05 13:03:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:08,177 INFO L225 Difference]: With dead ends: 11747 [2021-06-05 13:03:08,177 INFO L226 Difference]: Without dead ends: 11168 [2021-06-05 13:03:08,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11168 states. [2021-06-05 13:03:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11168 to 6303. [2021-06-05 13:03:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6266 states have (on average 4.357644430258538) internal successors, (27305), 6302 states have internal predecessors, (27305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 27305 transitions. [2021-06-05 13:03:08,461 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 27305 transitions. Word has length 8 [2021-06-05 13:03:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:08,462 INFO L482 AbstractCegarLoop]: Abstraction has 6303 states and 27305 transitions. [2021-06-05 13:03:08,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 27305 transitions. [2021-06-05 13:03:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:03:08,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:08,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:08,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 13:03:08,465 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 228120531, now seen corresponding path program 1 times [2021-06-05 13:03:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712384334] [2021-06-05 13:03:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:08,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:08,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712384334] [2021-06-05 13:03:08,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712384334] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:08,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:08,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:03:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782720076] [2021-06-05 13:03:08,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:03:08,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:03:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:03:08,525 INFO L87 Difference]: Start difference. First operand 6303 states and 27305 transitions. Second operand has 6 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) [2021-06-05 13:03:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:08,716 INFO L93 Difference]: Finished difference Result 9652 states and 41256 transitions. [2021-06-05 13:03:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:03:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 [2021-06-05 13:03:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:08,748 INFO L225 Difference]: With dead ends: 9652 [2021-06-05 13:03:08,748 INFO L226 Difference]: Without dead ends: 8198 [2021-06-05 13:03:08,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:03:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8198 states. [2021-06-05 13:03:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8198 to 5192. [2021-06-05 13:03:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5192 states, 5162 states have (on average 4.303177063153816) internal successors, (22213), 5191 states have internal predecessors, (22213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:08,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5192 states to 5192 states and 22213 transitions. [2021-06-05 13:03:08,936 INFO L78 Accepts]: Start accepts. Automaton has 5192 states and 22213 transitions. Word has length 12 [2021-06-05 13:03:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:08,936 INFO L482 AbstractCegarLoop]: Abstraction has 5192 states and 22213 transitions. [2021-06-05 13:03:08,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 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) [2021-06-05 13:03:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 5192 states and 22213 transitions. [2021-06-05 13:03:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:03:08,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:08,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:08,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 13:03:08,944 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1451324531, now seen corresponding path program 1 times [2021-06-05 13:03:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:08,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20229851] [2021-06-05 13:03:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:08,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20229851] [2021-06-05 13:03:08,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20229851] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:08,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:08,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:03:08,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885580572] [2021-06-05 13:03:08,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:03:08,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:03:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:03:08,999 INFO L87 Difference]: Start difference. First operand 5192 states and 22213 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-06-05 13:03:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:09,076 INFO L93 Difference]: Finished difference Result 1709 states and 7879 transitions. [2021-06-05 13:03:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:03:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) Word has length 16 [2021-06-05 13:03:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:09,077 INFO L225 Difference]: With dead ends: 1709 [2021-06-05 13:03:09,077 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:03:09,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:03:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:03:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:03:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:03:09,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-06-05 13:03:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:09,078 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:03:09,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-06-05 13:03:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:03:09,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:03:09,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:03:09,079 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:03:09,079 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:03:09,079 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:09,079 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:09,080 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:09,080 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:09,080 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:09,080 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:09,080 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:09,080 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:03:09,083 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-06-05 13:03:09,173 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 2188 states, 2141 states have (on average 4.634750116767865) internal successors, (9923), 2187 states have internal predecessors, (9923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 13:03:09,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:09,176 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 13:03:09,177 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:03:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1072247397, now seen corresponding path program 1 times [2021-06-05 13:03:09,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:09,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108177596] [2021-06-05 13:03:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:09,188 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:09,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:09,192 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:03:09,192 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:03:09,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:03:09,192 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:03:09,192 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:03:09,192 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-05 13:03:09,198 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:03:09,198 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 13:03:09,198 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:09,199 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:09,199 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:09,199 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:09,199 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:09,199 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:09,199 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:09,199 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:03:09,199 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-06-05 13:03:09,950 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:09,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:09,971 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:09,971 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash 4373477, now seen corresponding path program 1 times [2021-06-05 13:03:09,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:09,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238809053] [2021-06-05 13:03:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:09,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238809053] [2021-06-05 13:03:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238809053] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:09,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:09,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:03:09,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403279968] [2021-06-05 13:03:09,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:03:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:03:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:10,013 INFO L87 Difference]: Start difference. First operand has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:10,350 INFO L93 Difference]: Finished difference Result 31662 states and 166199 transitions. [2021-06-05 13:03:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:03:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:03:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:10,502 INFO L225 Difference]: With dead ends: 31662 [2021-06-05 13:03:10,502 INFO L226 Difference]: Without dead ends: 31572 [2021-06-05 13:03:10,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31572 states. [2021-06-05 13:03:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31572 to 30744. [2021-06-05 13:03:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30744 states, 30657 states have (on average 5.3469680660208105) internal successors, (163922), 30743 states have internal predecessors, (163922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30744 states to 30744 states and 163922 transitions. [2021-06-05 13:03:11,854 INFO L78 Accepts]: Start accepts. Automaton has 30744 states and 163922 transitions. Word has length 4 [2021-06-05 13:03:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:11,854 INFO L482 AbstractCegarLoop]: Abstraction has 30744 states and 163922 transitions. [2021-06-05 13:03:11,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30744 states and 163922 transitions. [2021-06-05 13:03:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:03:11,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:11,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:11,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 13:03:11,859 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:11,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1791475379, now seen corresponding path program 1 times [2021-06-05 13:03:11,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:11,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211475415] [2021-06-05 13:03:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:03:11,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:11,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211475415] [2021-06-05 13:03:11,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211475415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:11,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:11,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:03:11,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309680197] [2021-06-05 13:03:11,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:03:11,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:11,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:03:11,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:11,875 INFO L87 Difference]: Start difference. First operand 30744 states and 163922 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:12,756 INFO L93 Difference]: Finished difference Result 68557 states and 348838 transitions. [2021-06-05 13:03:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:03:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-06-05 13:03:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:13,127 INFO L225 Difference]: With dead ends: 68557 [2021-06-05 13:03:13,127 INFO L226 Difference]: Without dead ends: 67546 [2021-06-05 13:03:13,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67546 states. [2021-06-05 13:03:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67546 to 36470. [2021-06-05 13:03:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36470 states, 36386 states have (on average 5.21409333260045) internal successors, (189720), 36469 states have internal predecessors, (189720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36470 states to 36470 states and 189720 transitions. [2021-06-05 13:03:15,197 INFO L78 Accepts]: Start accepts. Automaton has 36470 states and 189720 transitions. Word has length 8 [2021-06-05 13:03:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:15,197 INFO L482 AbstractCegarLoop]: Abstraction has 36470 states and 189720 transitions. [2021-06-05 13:03:15,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36470 states and 189720 transitions. [2021-06-05 13:03:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:03:15,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:15,205 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:15,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 13:03:15,205 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:15,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2140034250, now seen corresponding path program 1 times [2021-06-05 13:03:15,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:15,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294328376] [2021-06-05 13:03:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:03:15,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:15,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294328376] [2021-06-05 13:03:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294328376] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:15,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:15,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:03:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635673536] [2021-06-05 13:03:15,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:03:15,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:03:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:03:15,231 INFO L87 Difference]: Start difference. First operand 36470 states and 189720 transitions. Second operand has 6 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) [2021-06-05 13:03:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:16,086 INFO L93 Difference]: Finished difference Result 68258 states and 346734 transitions. [2021-06-05 13:03:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:03:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 [2021-06-05 13:03:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:16,367 INFO L225 Difference]: With dead ends: 68258 [2021-06-05 13:03:16,367 INFO L226 Difference]: Without dead ends: 64784 [2021-06-05 13:03:16,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:03:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64784 states. [2021-06-05 13:03:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64784 to 36257. [2021-06-05 13:03:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36257 states, 36180 states have (on average 5.147761194029851) internal successors, (186246), 36256 states have internal predecessors, (186246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36257 states to 36257 states and 186246 transitions. [2021-06-05 13:03:18,145 INFO L78 Accepts]: Start accepts. Automaton has 36257 states and 186246 transitions. Word has length 12 [2021-06-05 13:03:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:18,145 INFO L482 AbstractCegarLoop]: Abstraction has 36257 states and 186246 transitions. [2021-06-05 13:03:18,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 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) [2021-06-05 13:03:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 36257 states and 186246 transitions. [2021-06-05 13:03:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:03:18,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:18,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:18,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 13:03:18,157 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1245031098, now seen corresponding path program 1 times [2021-06-05 13:03:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:18,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189158774] [2021-06-05 13:03:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:03:18,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:18,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189158774] [2021-06-05 13:03:18,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189158774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:18,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:18,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:03:18,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946078655] [2021-06-05 13:03:18,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:03:18,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:03:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:03:18,190 INFO L87 Difference]: Start difference. First operand 36257 states and 186246 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-06-05 13:03:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:18,942 INFO L93 Difference]: Finished difference Result 50680 states and 260838 transitions. [2021-06-05 13:03:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:03:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) Word has length 16 [2021-06-05 13:03:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:19,140 INFO L225 Difference]: With dead ends: 50680 [2021-06-05 13:03:19,141 INFO L226 Difference]: Without dead ends: 44097 [2021-06-05 13:03:19,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:03:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44097 states. [2021-06-05 13:03:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44097 to 29828. [2021-06-05 13:03:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29828 states, 29766 states have (on average 5.116811126788954) internal successors, (152307), 29827 states have internal predecessors, (152307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29828 states to 29828 states and 152307 transitions. [2021-06-05 13:03:20,641 INFO L78 Accepts]: Start accepts. Automaton has 29828 states and 152307 transitions. Word has length 16 [2021-06-05 13:03:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:20,642 INFO L482 AbstractCegarLoop]: Abstraction has 29828 states and 152307 transitions. [2021-06-05 13:03:20,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-06-05 13:03:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 29828 states and 152307 transitions. [2021-06-05 13:03:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:03:20,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:20,662 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:20,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 13:03:20,663 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:20,663 INFO L82 PathProgramCache]: Analyzing trace with hash -557703166, now seen corresponding path program 1 times [2021-06-05 13:03:20,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:20,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262778114] [2021-06-05 13:03:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:03:20,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262778114] [2021-06-05 13:03:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262778114] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:20,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:20,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:03:20,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670464321] [2021-06-05 13:03:20,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:03:20,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:03:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:03:20,764 INFO L87 Difference]: Start difference. First operand 29828 states and 152307 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:20,953 INFO L93 Difference]: Finished difference Result 6785 states and 38140 transitions. [2021-06-05 13:03:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:03:20,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-06-05 13:03:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:20,954 INFO L225 Difference]: With dead ends: 6785 [2021-06-05 13:03:20,954 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:03:20,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:03:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:03:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:03:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:03:20,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-05 13:03:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:20,955 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:03:20,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:03:20,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:03:20,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 13:03:20,957 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:03:20,957 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:03:20,957 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:20,957 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:20,957 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:20,957 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:20,957 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:20,957 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:20,957 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:20,957 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:03:20,958 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-06-05 13:03:21,786 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 10938 states, 10843 states have (on average 5.584063451074426) internal successors, (60548), 10937 states have internal predecessors, (60548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:03:21,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:21,808 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:21,808 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:03:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1467091051, now seen corresponding path program 1 times [2021-06-05 13:03:21,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:21,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617442259] [2021-06-05 13:03:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:21,810 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:03:21,811 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:03:21,812 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:03:21,812 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:03:21,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 13:03:21,812 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:03:21,812 WARN L242 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:03:21,812 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-05 13:03:21,822 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:03:21,822 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 13:03:21,822 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:03:21,822 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:03:21,823 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:03:21,823 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:03:21,823 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:03:21,823 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:03:21,823 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:03:21,823 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:03:21,823 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-06-05 13:03:38,302 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:03:38,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:38,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:03:38,385 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 5579658, now seen corresponding path program 1 times [2021-06-05 13:03:38,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:38,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373387899] [2021-06-05 13:03:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:38,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:38,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373387899] [2021-06-05 13:03:38,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373387899] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:38,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:38,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:03:38,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61685723] [2021-06-05 13:03:38,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:03:38,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:38,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:03:38,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:38,487 INFO L87 Difference]: Start difference. First operand has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:40,546 INFO L93 Difference]: Finished difference Result 160806 states and 992685 transitions. [2021-06-05 13:03:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:03:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:03:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:41,458 INFO L225 Difference]: With dead ends: 160806 [2021-06-05 13:03:41,459 INFO L226 Difference]: Without dead ends: 160690 [2021-06-05 13:03:41,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:03:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160690 states. [2021-06-05 13:03:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160690 to 158164. [2021-06-05 13:03:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158164 states, 157982 states have (on average 6.239052550290539) internal successors, (985658), 158163 states have internal predecessors, (985658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158164 states to 158164 states and 985658 transitions. [2021-06-05 13:03:51,685 INFO L78 Accepts]: Start accepts. Automaton has 158164 states and 985658 transitions. Word has length 4 [2021-06-05 13:03:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:03:51,685 INFO L482 AbstractCegarLoop]: Abstraction has 158164 states and 985658 transitions. [2021-06-05 13:03:51,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:03:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 158164 states and 985658 transitions. [2021-06-05 13:03:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:03:51,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:03:51,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:03:51,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 13:03:51,686 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:03:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:03:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1022663346, now seen corresponding path program 1 times [2021-06-05 13:03:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:03:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917661564] [2021-06-05 13:03:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:03:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:03:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:03:51,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:03:51,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917661564] [2021-06-05 13:03:51,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917661564] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:03:51,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:03:51,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:03:51,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556230245] [2021-06-05 13:03:51,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:03:51,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:03:51,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:03:51,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:03:51,740 INFO L87 Difference]: Start difference. First operand 158164 states and 985658 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:03:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:03:56,440 INFO L93 Difference]: Finished difference Result 375252 states and 2224149 transitions. [2021-06-05 13:03:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:03:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-06-05 13:03:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:03:59,259 INFO L225 Difference]: With dead ends: 375252 [2021-06-05 13:03:59,260 INFO L226 Difference]: Without dead ends: 373651 [2021-06-05 13:03:59,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:04:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373651 states. [2021-06-05 13:04:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373651 to 196386. [2021-06-05 13:04:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196386 states, 196207 states have (on average 6.07898800756344) internal successors, (1192740), 196385 states have internal predecessors, (1192740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:04:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196386 states to 196386 states and 1192740 transitions. [2021-06-05 13:04:14,856 INFO L78 Accepts]: Start accepts. Automaton has 196386 states and 1192740 transitions. Word has length 8 [2021-06-05 13:04:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:04:14,856 INFO L482 AbstractCegarLoop]: Abstraction has 196386 states and 1192740 transitions. [2021-06-05 13:04:14,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-06-05 13:04:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 196386 states and 1192740 transitions. [2021-06-05 13:04:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:04:14,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:04:14,868 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:04:14,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 13:04:14,868 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:04:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:04:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash -947585087, now seen corresponding path program 1 times [2021-06-05 13:04:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:04:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264767557] [2021-06-05 13:04:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:04:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:04:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:04:14,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:04:14,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264767557] [2021-06-05 13:04:14,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264767557] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:04:14,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:04:14,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:04:14,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49842168] [2021-06-05 13:04:14,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:04:14,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:04:14,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:04:14,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:04:14,897 INFO L87 Difference]: Start difference. First operand 196386 states and 1192740 transitions. Second operand has 6 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) [2021-06-05 13:04:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:04:20,090 INFO L93 Difference]: Finished difference Result 413429 states and 2434128 transitions. [2021-06-05 13:04:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:04:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 [2021-06-05 13:04:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:04:22,982 INFO L225 Difference]: With dead ends: 413429 [2021-06-05 13:04:22,982 INFO L226 Difference]: Without dead ends: 406500 [2021-06-05 13:04:22,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:04:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406500 states. [2021-06-05 13:04:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406500 to 211735. [2021-06-05 13:04:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211735 states, 211563 states have (on average 6.00484489253792) internal successors, (1270403), 211734 states have internal predecessors, (1270403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:04:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211735 states to 211735 states and 1270403 transitions. [2021-06-05 13:04:40,745 INFO L78 Accepts]: Start accepts. Automaton has 211735 states and 1270403 transitions. Word has length 12 [2021-06-05 13:04:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:04:40,746 INFO L482 AbstractCegarLoop]: Abstraction has 211735 states and 1270403 transitions. [2021-06-05 13:04:40,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 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) [2021-06-05 13:04:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 211735 states and 1270403 transitions. [2021-06-05 13:04:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:04:41,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:04:41,420 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:04:41,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 13:04:41,421 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:04:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:04:41,421 INFO L82 PathProgramCache]: Analyzing trace with hash 908038227, now seen corresponding path program 1 times [2021-06-05 13:04:41,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:04:41,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370753878] [2021-06-05 13:04:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:04:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:04:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:04:41,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:04:41,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370753878] [2021-06-05 13:04:41,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370753878] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:04:41,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:04:41,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:04:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236395339] [2021-06-05 13:04:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:04:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:04:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:04:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:04:41,470 INFO L87 Difference]: Start difference. First operand 211735 states and 1270403 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-06-05 13:04:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:04:45,779 INFO L93 Difference]: Finished difference Result 367283 states and 2180365 transitions. [2021-06-05 13:04:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:04:45,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) Word has length 16 [2021-06-05 13:04:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:04:48,462 INFO L225 Difference]: With dead ends: 367283 [2021-06-05 13:04:48,462 INFO L226 Difference]: Without dead ends: 349507 [2021-06-05 13:04:48,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:04:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349507 states. [2021-06-05 13:05:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349507 to 203215. [2021-06-05 13:05:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203215 states, 203058 states have (on average 5.959479557564833) internal successors, (1210120), 203214 states have internal predecessors, (1210120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203215 states to 203215 states and 1210120 transitions. [2021-06-05 13:05:04,309 INFO L78 Accepts]: Start accepts. Automaton has 203215 states and 1210120 transitions. Word has length 16 [2021-06-05 13:05:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:05:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 203215 states and 1210120 transitions. [2021-06-05 13:05:04,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-06-05 13:05:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 203215 states and 1210120 transitions. [2021-06-05 13:05:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:05:04,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:05:04,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:05:04,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 13:05:04,373 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:05:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:05:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1278972565, now seen corresponding path program 1 times [2021-06-05 13:05:04,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:05:04,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916646864] [2021-06-05 13:05:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:05:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:05:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:05:04,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:05:04,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916646864] [2021-06-05 13:05:04,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916646864] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:05:04,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:05:04,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:05:04,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20703482] [2021-06-05 13:05:04,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:05:04,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:05:04,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:05:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:05:04,411 INFO L87 Difference]: Start difference. First operand 203215 states and 1210120 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:05:08,593 INFO L93 Difference]: Finished difference Result 261890 states and 1576557 transitions. [2021-06-05 13:05:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:05:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-06-05 13:05:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:05:11,129 INFO L225 Difference]: With dead ends: 261890 [2021-06-05 13:05:11,130 INFO L226 Difference]: Without dead ends: 233801 [2021-06-05 13:05:11,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:05:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233801 states. [2021-06-05 13:05:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233801 to 169538. [2021-06-05 13:05:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169538 states, 169412 states have (on average 5.945116048449933) internal successors, (1007174), 169537 states have internal predecessors, (1007174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169538 states to 169538 states and 1007174 transitions. [2021-06-05 13:05:22,445 INFO L78 Accepts]: Start accepts. Automaton has 169538 states and 1007174 transitions. Word has length 20 [2021-06-05 13:05:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:05:22,446 INFO L482 AbstractCegarLoop]: Abstraction has 169538 states and 1007174 transitions. [2021-06-05 13:05:22,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 169538 states and 1007174 transitions. [2021-06-05 13:05:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:05:22,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:05:22,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:05:22,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 13:05:22,476 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:05:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:05:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1930385074, now seen corresponding path program 1 times [2021-06-05 13:05:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:05:22,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177846728] [2021-06-05 13:05:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:05:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:05:23,198 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 13:05:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:05:23,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:05:23,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177846728] [2021-06-05 13:05:23,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177846728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:05:23,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:05:23,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:05:23,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672973589] [2021-06-05 13:05:23,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:05:23,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:05:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:05:23,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:05:23,201 INFO L87 Difference]: Start difference. First operand 169538 states and 1007174 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-06-05 13:05:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:05:23,582 INFO L93 Difference]: Finished difference Result 26723 states and 177258 transitions. [2021-06-05 13:05:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:05:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 [2021-06-05 13:05:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:05:23,582 INFO L225 Difference]: With dead ends: 26723 [2021-06-05 13:05:23,582 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:05:23,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 699.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:05:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:05:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:05:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:05:23,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-05 13:05:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:05:23,583 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:05:23,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-06-05 13:05:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:05:23,583 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:05:23,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 13:05:23,583 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:05:23,584 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:05:23,584 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:05:23,584 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:05:23,584 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:05:23,584 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:05:23,584 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:05:23,584 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:05:23,584 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:05:23,584 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:05:23,585 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-06-05 13:05:39,825 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 54688 states, 54497 states have (on average 6.558581206304934) internal successors, (357423), 54687 states have internal predecessors, (357423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:05:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:05:39,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:05:39,912 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:05:39,912 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:05:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:05:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash -817562652, now seen corresponding path program 1 times [2021-06-05 13:05:39,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:05:39,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908297432] [2021-06-05 13:05:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:05:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:05:39,921 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:05:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:05:39,926 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:05:39,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:05:39,930 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:05:39,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 13:05:39,930 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:05:39,930 WARN L242 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:05:39,930 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-05 13:05:39,943 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:05:39,944 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-06-05 13:05:39,945 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:05:39,945 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:05:39,945 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:05:39,945 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:05:39,945 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:05:39,945 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:05:39,945 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:05:39,946 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:05:39,949 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 45 transitions, 167 flow [2021-06-05 13:14:29,286 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 273438 states, 273055 states have (on average 7.546274560070316) internal successors, (2060548), 273437 states have internal predecessors, (2060548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 273438 states, 273055 states have (on average 7.546274560070316) internal successors, (2060548), 273437 states have internal predecessors, (2060548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:14:29,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:29,806 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:14:29,806 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash 6969103, now seen corresponding path program 1 times [2021-06-05 13:14:29,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:29,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916756884] [2021-06-05 13:14:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:14:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916756884] [2021-06-05 13:14:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916756884] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:29,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:29,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:14:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454286632] [2021-06-05 13:14:29,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:14:29,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:14:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:14:30,222 INFO L87 Difference]: Start difference. First operand has 273438 states, 273055 states have (on average 7.546274560070316) internal successors, (2060548), 273437 states have internal predecessors, (2060548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:42,640 INFO L93 Difference]: Finished difference Result 810902 states and 5756895 transitions. [2021-06-05 13:14:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:14:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-06-05 13:14:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:52,567 INFO L225 Difference]: With dead ends: 810902 [2021-06-05 13:14:52,567 INFO L226 Difference]: Without dead ends: 810757 [2021-06-05 13:14:52,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:15:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810757 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown