/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-770125f [2021-05-22 01:30:42,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 01:30:42,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 01:30:42,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 01:30:42,493 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 [2021-05-22 01:30:42,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 01:30:42,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 01:30:42,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 01:30:42,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 01:30:42,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 01:30:42,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 01:30:42,532 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 01:30:42,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 01:30:42,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 01:30:42,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 01:30:42,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 01:30:42,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 01:30:42,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 01:30:42,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 01:30:42,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 01:30:42,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:30:42,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 01:30:42,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 01:30:42,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 01:30:42,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 01:30:42,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 01:30:42,536 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 01:30:42,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 01:30:42,536 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 01:30:42,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 01:30:42,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 01:30:42,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 01:30:42,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 01:30:42,878 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 01:30:42,879 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 01:30:42,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl [2021-05-22 01:30:42,880 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl' [2021-05-22 01:30:42,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 01:30:42,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 01:30:42,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 01:30:42,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 01:30:42,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 01:30:42,922 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 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,927 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 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 01:30:42,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 01:30:42,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 01:30:42,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 01:30:42,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/1) ... [2021-05-22 01:30:42,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 01:30:42,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 01:30:42,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 01:30:42,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 01:30:42,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (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 [2021-05-22 01:30:43,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 01:30:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 01:30:43,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 01:30:43,016 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-05-22 01:30:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-05-22 01:30:43,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-05-22 01:30:43,016 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 01:30:43,132 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 01:30:43,133 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-22 01:30:43,135 INFO L202 PluginConnector]: Adding new model fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:30:43 BoogieIcfgContainer [2021-05-22 01:30:43,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 01:30:43,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 01:30:43,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 01:30:43,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 01:30:43,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:30:42" (1/2) ... [2021-05-22 01:30:43,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63da9ad6 and model type fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 01:30:43, skipping insertion in model container [2021-05-22 01:30:43,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:30:43" (2/2) ... [2021-05-22 01:30:43,148 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_mutex.bpl [2021-05-22 01:30:43,157 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 01:30:43,157 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 01:30:43,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 01:30:43,159 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 01:30:43,201 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:30:43,222 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-22 01:30:43,244 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:43,244 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:43,244 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:43,245 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:43,245 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:43,246 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:43,246 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:43,246 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:30:43,256 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-05-22 01:30:43,268 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) [2021-05-22 01:30:43,270 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) [2021-05-22 01:30:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:30:43,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:43,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:30:43,276 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993, now seen corresponding path program 1 times [2021-05-22 01:30:43,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:43,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453980839] [2021-05-22 01:30:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:43,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:43,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453980839] [2021-05-22 01:30:43,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453980839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:43,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:43,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:30:43,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177124605] [2021-05-22 01:30:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:30:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:43,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:30:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:43,473 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) [2021-05-22 01:30:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:43,501 INFO L93 Difference]: Finished difference Result 15 states and 23 transitions. [2021-05-22 01:30:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:30:43,518 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 [2021-05-22 01:30:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:43,536 INFO L225 Difference]: With dead ends: 15 [2021-05-22 01:30:43,536 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:30:43,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:30:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:30:43,567 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) [2021-05-22 01:30:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:30:43,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2021-05-22 01:30:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:43,568 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:30:43,568 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) [2021-05-22 01:30:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:30:43,568 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:30:43,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 01:30:43,569 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:30:43,585 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:30:43,587 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:43,587 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:43,587 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:43,587 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:43,587 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:43,587 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:43,587 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:43,588 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:30:43,588 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2021-05-22 01:30:43,589 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) [2021-05-22 01:30:43,590 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) [2021-05-22 01:30:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-05-22 01:30:43,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:43,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-05-22 01:30:43,590 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:30:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash 45133, now seen corresponding path program 1 times [2021-05-22 01:30:43,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:43,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340346564] [2021-05-22 01:30:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:43,594 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:43,596 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:43,623 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:30:43,623 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:30:43,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 01:30:43,624 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:30:43,624 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:30:43,624 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-05-22 01:30:43,645 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:30:43,646 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 01:30:43,648 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:43,648 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:43,648 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:43,648 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:43,648 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:43,648 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:43,648 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:43,648 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:30:43,649 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-05-22 01:30:43,657 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) [2021-05-22 01:30:43,657 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) [2021-05-22 01:30:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:30:43,658 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:43,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:30:43,658 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:43,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:43,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1865558, now seen corresponding path program 1 times [2021-05-22 01:30:43,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:43,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149838003] [2021-05-22 01:30:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:43,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149838003] [2021-05-22 01:30:43,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149838003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:43,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:43,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:30:43,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308207546] [2021-05-22 01:30:43,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:30:43,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:43,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:30:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:43,703 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) [2021-05-22 01:30:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:43,781 INFO L93 Difference]: Finished difference Result 194 states and 489 transitions. [2021-05-22 01:30:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:30:43,783 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 [2021-05-22 01:30:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:43,788 INFO L225 Difference]: With dead ends: 194 [2021-05-22 01:30:43,788 INFO L226 Difference]: Without dead ends: 164 [2021-05-22 01:30:43,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-22 01:30:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 146. [2021-05-22 01:30:43,838 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) [2021-05-22 01:30:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 384 transitions. [2021-05-22 01:30:43,840 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 384 transitions. Word has length 4 [2021-05-22 01:30:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:43,840 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 384 transitions. [2021-05-22 01:30:43,840 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) [2021-05-22 01:30:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 384 transitions. [2021-05-22 01:30:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:30:43,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:43,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:43,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 01:30:43,841 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 943070893, now seen corresponding path program 1 times [2021-05-22 01:30:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:43,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915031398] [2021-05-22 01:30:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:30:43,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:43,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915031398] [2021-05-22 01:30:43,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915031398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:43,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:43,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:30:43,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530102060] [2021-05-22 01:30:43,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:30:43,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:30:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:43,903 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) [2021-05-22 01:30:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:43,952 INFO L93 Difference]: Finished difference Result 95 states and 248 transitions. [2021-05-22 01:30:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:30:43,953 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 [2021-05-22 01:30:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:43,953 INFO L225 Difference]: With dead ends: 95 [2021-05-22 01:30:43,953 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:30:43,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:30:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:30:43,955 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) [2021-05-22 01:30:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:30:43,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-05-22 01:30:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:43,955 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:30:43,955 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) [2021-05-22 01:30:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:30:43,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:30:43,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 01:30:43,957 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:30:43,957 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:30:43,961 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:43,961 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:43,961 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:43,962 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:43,962 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:43,962 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:43,962 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:43,962 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:30:43,963 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2021-05-22 01:30:43,973 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) [2021-05-22 01:30:43,974 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) [2021-05-22 01:30:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:30:43,974 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:43,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:30:43,974 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:30:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1865938, now seen corresponding path program 1 times [2021-05-22 01:30:43,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:43,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765597551] [2021-05-22 01:30:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:43,979 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:43,980 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:43,981 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:30:43,981 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:30:43,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 01:30:43,982 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:30:43,982 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:30:43,982 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-05-22 01:30:43,997 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:30:43,999 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-22 01:30:44,000 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:44,000 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:44,000 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:44,000 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:44,000 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:44,000 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:44,000 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:44,000 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:30:44,003 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-05-22 01:30:44,028 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) [2021-05-22 01:30:44,030 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) [2021-05-22 01:30:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:30:44,031 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:44,031 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:30:44,031 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2517147, now seen corresponding path program 1 times [2021-05-22 01:30:44,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:44,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062582281] [2021-05-22 01:30:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:44,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:44,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062582281] [2021-05-22 01:30:44,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062582281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:44,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:44,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:30:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625170966] [2021-05-22 01:30:44,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:30:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:30:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:44,078 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) [2021-05-22 01:30:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:44,136 INFO L93 Difference]: Finished difference Result 1150 states and 3931 transitions. [2021-05-22 01:30:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:30:44,136 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 [2021-05-22 01:30:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:44,146 INFO L225 Difference]: With dead ends: 1150 [2021-05-22 01:30:44,146 INFO L226 Difference]: Without dead ends: 1103 [2021-05-22 01:30:44,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-05-22 01:30:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1025. [2021-05-22 01:30:44,219 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) [2021-05-22 01:30:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3639 transitions. [2021-05-22 01:30:44,231 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3639 transitions. Word has length 4 [2021-05-22 01:30:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:44,231 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3639 transitions. [2021-05-22 01:30:44,231 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) [2021-05-22 01:30:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3639 transitions. [2021-05-22 01:30:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:30:44,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:44,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:44,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 01:30:44,235 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1064058921, now seen corresponding path program 1 times [2021-05-22 01:30:44,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:44,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554758408] [2021-05-22 01:30:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:44,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554758408] [2021-05-22 01:30:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554758408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:44,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:44,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:30:44,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145103525] [2021-05-22 01:30:44,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:30:44,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:44,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:30:44,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:44,288 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) [2021-05-22 01:30:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:44,383 INFO L93 Difference]: Finished difference Result 1734 states and 5933 transitions. [2021-05-22 01:30:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:30:44,383 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 [2021-05-22 01:30:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:44,393 INFO L225 Difference]: With dead ends: 1734 [2021-05-22 01:30:44,393 INFO L226 Difference]: Without dead ends: 1452 [2021-05-22 01:30:44,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-05-22 01:30:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 890. [2021-05-22 01:30:44,430 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) [2021-05-22 01:30:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3076 transitions. [2021-05-22 01:30:44,436 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3076 transitions. Word has length 8 [2021-05-22 01:30:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:44,436 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3076 transitions. [2021-05-22 01:30:44,437 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) [2021-05-22 01:30:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3076 transitions. [2021-05-22 01:30:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:30:44,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:44,442 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:44,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 01:30:44,442 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash 671599799, now seen corresponding path program 1 times [2021-05-22 01:30:44,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:44,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321269034] [2021-05-22 01:30:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:44,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321269034] [2021-05-22 01:30:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321269034] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:44,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:44,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:30:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482071212] [2021-05-22 01:30:44,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:30:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:30:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:30:44,501 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) [2021-05-22 01:30:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:44,562 INFO L93 Difference]: Finished difference Result 419 states and 1511 transitions. [2021-05-22 01:30:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:30:44,563 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 [2021-05-22 01:30:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:44,563 INFO L225 Difference]: With dead ends: 419 [2021-05-22 01:30:44,563 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:30:44,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:30:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:30:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:30:44,564 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) [2021-05-22 01:30:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:30:44,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-22 01:30:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:44,565 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:30:44,565 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) [2021-05-22 01:30:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:30:44,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:30:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 01:30:44,565 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:30:44,565 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:30:44,566 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:44,567 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:44,567 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:44,567 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:44,567 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:44,567 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:44,567 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:44,567 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:30:44,568 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2021-05-22 01:30:44,580 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) [2021-05-22 01:30:44,581 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) [2021-05-22 01:30:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-22 01:30:44,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:44,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-22 01:30:44,582 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:30:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash 78038544, now seen corresponding path program 1 times [2021-05-22 01:30:44,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:44,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950463298] [2021-05-22 01:30:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:44,587 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:44,590 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:44,591 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:30:44,591 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:30:44,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 01:30:44,591 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:30:44,591 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:30:44,591 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-05-22 01:30:44,600 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:30:44,601 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-22 01:30:44,602 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:44,603 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:44,604 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:44,605 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:44,605 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:44,606 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:44,606 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:44,606 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:30:44,608 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-05-22 01:30:44,737 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) [2021-05-22 01:30:44,748 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) [2021-05-22 01:30:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:30:44,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:44,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:30:44,750 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 3352960, now seen corresponding path program 1 times [2021-05-22 01:30:44,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:44,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65368288] [2021-05-22 01:30:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:44,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:44,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65368288] [2021-05-22 01:30:44,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65368288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:44,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:44,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:30:44,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037771623] [2021-05-22 01:30:44,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:30:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:44,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:30:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:44,783 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) [2021-05-22 01:30:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:44,927 INFO L93 Difference]: Finished difference Result 6142 states and 26589 transitions. [2021-05-22 01:30:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:30:44,928 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 [2021-05-22 01:30:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:44,984 INFO L225 Difference]: With dead ends: 6142 [2021-05-22 01:30:44,985 INFO L226 Difference]: Without dead ends: 6075 [2021-05-22 01:30:44,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2021-05-22 01:30:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 5811. [2021-05-22 01:30:45,277 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) [2021-05-22 01:30:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 25799 transitions. [2021-05-22 01:30:45,316 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 25799 transitions. Word has length 4 [2021-05-22 01:30:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:45,317 INFO L482 AbstractCegarLoop]: Abstraction has 5811 states and 25799 transitions. [2021-05-22 01:30:45,317 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) [2021-05-22 01:30:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 25799 transitions. [2021-05-22 01:30:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:30:45,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:45,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:45,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 01:30:45,319 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:45,319 INFO L82 PathProgramCache]: Analyzing trace with hash -125637173, now seen corresponding path program 1 times [2021-05-22 01:30:45,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:45,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265878055] [2021-05-22 01:30:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:45,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:45,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265878055] [2021-05-22 01:30:45,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265878055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:45,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:45,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:30:45,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556695111] [2021-05-22 01:30:45,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:30:45,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:30:45,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:45,340 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) [2021-05-22 01:30:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:45,517 INFO L93 Difference]: Finished difference Result 11747 states and 49988 transitions. [2021-05-22 01:30:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:30:45,518 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 [2021-05-22 01:30:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:45,772 INFO L225 Difference]: With dead ends: 11747 [2021-05-22 01:30:45,773 INFO L226 Difference]: Without dead ends: 11168 [2021-05-22 01:30:45,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11168 states. [2021-05-22 01:30:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11168 to 6303. [2021-05-22 01:30:46,171 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) [2021-05-22 01:30:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 27305 transitions. [2021-05-22 01:30:46,249 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 27305 transitions. Word has length 8 [2021-05-22 01:30:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:46,250 INFO L482 AbstractCegarLoop]: Abstraction has 6303 states and 27305 transitions. [2021-05-22 01:30:46,251 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) [2021-05-22 01:30:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 27305 transitions. [2021-05-22 01:30:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:30:46,253 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:46,253 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:46,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 01:30:46,254 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:46,254 INFO L82 PathProgramCache]: Analyzing trace with hash 228120531, now seen corresponding path program 1 times [2021-05-22 01:30:46,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:46,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066979905] [2021-05-22 01:30:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:46,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066979905] [2021-05-22 01:30:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066979905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:46,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:46,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:30:46,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128597271] [2021-05-22 01:30:46,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:30:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:30:46,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:30:46,282 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) [2021-05-22 01:30:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:46,519 INFO L93 Difference]: Finished difference Result 9652 states and 41256 transitions. [2021-05-22 01:30:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:30:46,520 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 [2021-05-22 01:30:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:46,564 INFO L225 Difference]: With dead ends: 9652 [2021-05-22 01:30:46,565 INFO L226 Difference]: Without dead ends: 8198 [2021-05-22 01:30:46,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:30:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8198 states. [2021-05-22 01:30:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8198 to 5192. [2021-05-22 01:30:46,865 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) [2021-05-22 01:30:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5192 states to 5192 states and 22213 transitions. [2021-05-22 01:30:46,891 INFO L78 Accepts]: Start accepts. Automaton has 5192 states and 22213 transitions. Word has length 12 [2021-05-22 01:30:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:46,892 INFO L482 AbstractCegarLoop]: Abstraction has 5192 states and 22213 transitions. [2021-05-22 01:30:46,892 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) [2021-05-22 01:30:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5192 states and 22213 transitions. [2021-05-22 01:30:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:30:46,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:46,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:46,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 01:30:46,895 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1451324531, now seen corresponding path program 1 times [2021-05-22 01:30:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:46,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560193459] [2021-05-22 01:30:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:46,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:46,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560193459] [2021-05-22 01:30:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560193459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:46,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:46,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:30:46,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739232353] [2021-05-22 01:30:46,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:30:46,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:46,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:30:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:30:46,938 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) [2021-05-22 01:30:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:47,032 INFO L93 Difference]: Finished difference Result 1709 states and 7879 transitions. [2021-05-22 01:30:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:30:47,033 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 [2021-05-22 01:30:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:47,033 INFO L225 Difference]: With dead ends: 1709 [2021-05-22 01:30:47,033 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:30:47,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:30:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:30:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:30:47,034 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) [2021-05-22 01:30:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:30:47,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-05-22 01:30:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:47,035 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:30:47,035 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) [2021-05-22 01:30:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:30:47,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:30:47,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 01:30:47,035 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:30:47,035 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:30:47,036 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:47,036 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:47,036 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:47,036 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:47,036 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:47,036 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:47,037 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:47,037 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:30:47,039 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2021-05-22 01:30:47,164 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) [2021-05-22 01:30:47,168 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) [2021-05-22 01:30:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-05-22 01:30:47,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:47,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-05-22 01:30:47,169 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:30:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1072247397, now seen corresponding path program 1 times [2021-05-22 01:30:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078748029] [2021-05-22 01:30:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:47,172 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:30:47,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:30:47,174 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:30:47,174 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:30:47,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 01:30:47,174 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:30:47,175 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:30:47,175 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-05-22 01:30:47,182 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:30:47,182 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-22 01:30:47,183 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:30:47,183 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:30:47,183 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:30:47,183 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:30:47,183 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:30:47,184 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:30:47,184 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:30:47,184 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:30:47,184 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-05-22 01:30:48,189 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) [2021-05-22 01:30:48,214 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) [2021-05-22 01:30:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:30:48,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:48,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:30:48,215 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash 4373477, now seen corresponding path program 1 times [2021-05-22 01:30:48,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:48,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347028463] [2021-05-22 01:30:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:30:48,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347028463] [2021-05-22 01:30:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347028463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:48,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:48,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:30:48,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074629861] [2021-05-22 01:30:48,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:30:48,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:30:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:48,259 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) [2021-05-22 01:30:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:48,709 INFO L93 Difference]: Finished difference Result 31662 states and 166199 transitions. [2021-05-22 01:30:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:30:48,710 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 [2021-05-22 01:30:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:49,167 INFO L225 Difference]: With dead ends: 31662 [2021-05-22 01:30:49,167 INFO L226 Difference]: Without dead ends: 31572 [2021-05-22 01:30:49,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:30:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31572 states. [2021-05-22 01:30:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31572 to 30744. [2021-05-22 01:30:50,658 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) [2021-05-22 01:30:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30744 states to 30744 states and 163922 transitions. [2021-05-22 01:30:50,797 INFO L78 Accepts]: Start accepts. Automaton has 30744 states and 163922 transitions. Word has length 4 [2021-05-22 01:30:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:50,797 INFO L482 AbstractCegarLoop]: Abstraction has 30744 states and 163922 transitions. [2021-05-22 01:30:50,797 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) [2021-05-22 01:30:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 30744 states and 163922 transitions. [2021-05-22 01:30:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:30:50,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:50,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:50,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 01:30:50,801 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1791475379, now seen corresponding path program 1 times [2021-05-22 01:30:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:50,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171582652] [2021-05-22 01:30:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:30:50,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:50,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171582652] [2021-05-22 01:30:50,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171582652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:50,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:50,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:30:50,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821978197] [2021-05-22 01:30:50,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:30:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:30:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:50,819 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) [2021-05-22 01:30:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:51,962 INFO L93 Difference]: Finished difference Result 68557 states and 348838 transitions. [2021-05-22 01:30:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:30:51,963 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 [2021-05-22 01:30:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:52,300 INFO L225 Difference]: With dead ends: 68557 [2021-05-22 01:30:52,300 INFO L226 Difference]: Without dead ends: 67546 [2021-05-22 01:30:52,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:30:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67546 states. [2021-05-22 01:30:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67546 to 36470. [2021-05-22 01:30:54,109 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) [2021-05-22 01:30:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36470 states to 36470 states and 189720 transitions. [2021-05-22 01:30:54,534 INFO L78 Accepts]: Start accepts. Automaton has 36470 states and 189720 transitions. Word has length 8 [2021-05-22 01:30:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:54,535 INFO L482 AbstractCegarLoop]: Abstraction has 36470 states and 189720 transitions. [2021-05-22 01:30:54,535 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) [2021-05-22 01:30:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36470 states and 189720 transitions. [2021-05-22 01:30:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:30:54,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:54,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:54,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 01:30:54,558 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2140034250, now seen corresponding path program 1 times [2021-05-22 01:30:54,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:54,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036908030] [2021-05-22 01:30:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:30:54,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:54,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036908030] [2021-05-22 01:30:54,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036908030] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:54,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:54,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:30:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611986135] [2021-05-22 01:30:54,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:30:54,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:30:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:30:54,643 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) [2021-05-22 01:30:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:55,237 INFO L93 Difference]: Finished difference Result 68258 states and 346734 transitions. [2021-05-22 01:30:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:30:55,237 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 [2021-05-22 01:30:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:56,007 INFO L225 Difference]: With dead ends: 68258 [2021-05-22 01:30:56,007 INFO L226 Difference]: Without dead ends: 64784 [2021-05-22 01:30:56,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:30:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64784 states. [2021-05-22 01:30:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64784 to 36257. [2021-05-22 01:30:57,848 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) [2021-05-22 01:30:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36257 states to 36257 states and 186246 transitions. [2021-05-22 01:30:58,029 INFO L78 Accepts]: Start accepts. Automaton has 36257 states and 186246 transitions. Word has length 12 [2021-05-22 01:30:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:30:58,029 INFO L482 AbstractCegarLoop]: Abstraction has 36257 states and 186246 transitions. [2021-05-22 01:30:58,029 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) [2021-05-22 01:30:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36257 states and 186246 transitions. [2021-05-22 01:30:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:30:58,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:30:58,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:30:58,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 01:30:58,045 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:30:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:30:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1245031098, now seen corresponding path program 1 times [2021-05-22 01:30:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:30:58,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20534673] [2021-05-22 01:30:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:30:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:30:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:30:58,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:30:58,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20534673] [2021-05-22 01:30:58,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20534673] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:30:58,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:30:58,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:30:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127584208] [2021-05-22 01:30:58,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:30:58,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:30:58,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:30:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:30:58,090 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) [2021-05-22 01:30:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:30:58,582 INFO L93 Difference]: Finished difference Result 50680 states and 260838 transitions. [2021-05-22 01:30:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:30:58,583 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 [2021-05-22 01:30:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:30:58,753 INFO L225 Difference]: With dead ends: 50680 [2021-05-22 01:30:58,753 INFO L226 Difference]: Without dead ends: 44097 [2021-05-22 01:30:58,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:30:59,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44097 states. [2021-05-22 01:31:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44097 to 29828. [2021-05-22 01:31:00,334 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) [2021-05-22 01:31:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29828 states to 29828 states and 152307 transitions. [2021-05-22 01:31:00,474 INFO L78 Accepts]: Start accepts. Automaton has 29828 states and 152307 transitions. Word has length 16 [2021-05-22 01:31:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:00,474 INFO L482 AbstractCegarLoop]: Abstraction has 29828 states and 152307 transitions. [2021-05-22 01:31:00,474 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) [2021-05-22 01:31:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29828 states and 152307 transitions. [2021-05-22 01:31:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 01:31:00,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:00,484 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] [2021-05-22 01:31:00,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 01:31:00,484 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash -557703166, now seen corresponding path program 1 times [2021-05-22 01:31:00,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:00,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173682250] [2021-05-22 01:31:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 01:31:00,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:00,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173682250] [2021-05-22 01:31:00,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173682250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:00,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:00,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928134508] [2021-05-22 01:31:00,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:31:00,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:31:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:31:00,535 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) [2021-05-22 01:31:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:00,756 INFO L93 Difference]: Finished difference Result 6785 states and 38140 transitions. [2021-05-22 01:31:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:31:00,756 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 [2021-05-22 01:31:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:00,756 INFO L225 Difference]: With dead ends: 6785 [2021-05-22 01:31:00,757 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:31:00,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:31:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:31:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:31:00,757 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) [2021-05-22 01:31:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:31:00,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-05-22 01:31:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:00,758 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:31:00,758 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) [2021-05-22 01:31:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:31:00,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:31:00,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 01:31:00,758 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:31:00,758 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:31:00,759 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:00,759 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:00,759 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:00,759 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:00,759 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:00,759 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:00,759 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:00,759 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:31:00,760 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2021-05-22 01:31:01,871 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) [2021-05-22 01:31:01,886 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) [2021-05-22 01:31:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-22 01:31:01,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:01,888 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:01,888 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:31:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1467091051, now seen corresponding path program 1 times [2021-05-22 01:31:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:01,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760981554] [2021-05-22 01:31:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:01,891 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:01,892 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:01,893 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:31:01,893 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:31:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 01:31:01,894 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:31:01,894 WARN L242 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:31:01,894 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-05-22 01:31:01,918 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:31:01,918 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-05-22 01:31:01,919 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:01,919 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:01,919 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:01,919 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:01,919 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:01,919 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:01,919 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:01,919 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:31:01,920 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-05-22 01:31:19,011 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) [2021-05-22 01:31:19,161 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) [2021-05-22 01:31:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:31:19,161 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:19,161 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:31:19,162 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 5579658, now seen corresponding path program 1 times [2021-05-22 01:31:19,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:19,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965821840] [2021-05-22 01:31:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:19,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965821840] [2021-05-22 01:31:19,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965821840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:19,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:19,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:19,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154835082] [2021-05-22 01:31:19,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:31:19,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:31:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:31:19,303 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) [2021-05-22 01:31:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:21,184 INFO L93 Difference]: Finished difference Result 160806 states and 992685 transitions. [2021-05-22 01:31:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:31:21,192 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 [2021-05-22 01:31:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:22,640 INFO L225 Difference]: With dead ends: 160806 [2021-05-22 01:31:22,640 INFO L226 Difference]: Without dead ends: 160690 [2021-05-22 01:31:22,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:31:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160690 states. [2021-05-22 01:31:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160690 to 158164. [2021-05-22 01:31:31,786 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) [2021-05-22 01:31:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158164 states to 158164 states and 985658 transitions. [2021-05-22 01:31:33,745 INFO L78 Accepts]: Start accepts. Automaton has 158164 states and 985658 transitions. Word has length 4 [2021-05-22 01:31:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:33,745 INFO L482 AbstractCegarLoop]: Abstraction has 158164 states and 985658 transitions. [2021-05-22 01:31:33,745 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) [2021-05-22 01:31:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 158164 states and 985658 transitions. [2021-05-22 01:31:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:31:33,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:33,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:33,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 01:31:33,746 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1022663346, now seen corresponding path program 1 times [2021-05-22 01:31:33,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:33,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428919464] [2021-05-22 01:31:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:33,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:33,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428919464] [2021-05-22 01:31:33,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428919464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:33,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:33,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:31:33,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181957] [2021-05-22 01:31:33,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:33,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:33,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:33,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:33,772 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) [2021-05-22 01:31:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:39,219 INFO L93 Difference]: Finished difference Result 375252 states and 2224149 transitions. [2021-05-22 01:31:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:31:39,219 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 [2021-05-22 01:31:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:42,192 INFO L225 Difference]: With dead ends: 375252 [2021-05-22 01:31:42,193 INFO L226 Difference]: Without dead ends: 373651 [2021-05-22 01:31:42,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373651 states. [2021-05-22 01:31:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373651 to 196386. [2021-05-22 01:31:58,454 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) [2021-05-22 01:32:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196386 states to 196386 states and 1192740 transitions. [2021-05-22 01:32:00,609 INFO L78 Accepts]: Start accepts. Automaton has 196386 states and 1192740 transitions. Word has length 8 [2021-05-22 01:32:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:00,609 INFO L482 AbstractCegarLoop]: Abstraction has 196386 states and 1192740 transitions. [2021-05-22 01:32:00,609 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) [2021-05-22 01:32:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 196386 states and 1192740 transitions. [2021-05-22 01:32:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:32:00,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:00,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:00,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 01:32:00,622 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash -947585087, now seen corresponding path program 1 times [2021-05-22 01:32:00,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:00,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872372550] [2021-05-22 01:32:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:32:00,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:00,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872372550] [2021-05-22 01:32:00,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872372550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:00,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:00,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:32:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105776573] [2021-05-22 01:32:00,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:32:00,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:32:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:32:00,648 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) [2021-05-22 01:32:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:06,522 INFO L93 Difference]: Finished difference Result 413429 states and 2434128 transitions. [2021-05-22 01:32:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:32:06,523 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 [2021-05-22 01:32:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:09,832 INFO L225 Difference]: With dead ends: 413429 [2021-05-22 01:32:09,832 INFO L226 Difference]: Without dead ends: 406500 [2021-05-22 01:32:09,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:32:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406500 states. [2021-05-22 01:32:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406500 to 211735. [2021-05-22 01:32:30,857 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) [2021-05-22 01:32:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211735 states to 211735 states and 1270403 transitions. [2021-05-22 01:32:33,015 INFO L78 Accepts]: Start accepts. Automaton has 211735 states and 1270403 transitions. Word has length 12 [2021-05-22 01:32:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:33,015 INFO L482 AbstractCegarLoop]: Abstraction has 211735 states and 1270403 transitions. [2021-05-22 01:32:33,016 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) [2021-05-22 01:32:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 211735 states and 1270403 transitions. [2021-05-22 01:32:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:33,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:33,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:33,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 01:32:33,073 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 908038227, now seen corresponding path program 1 times [2021-05-22 01:32:33,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:33,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310736227] [2021-05-22 01:32:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:32:33,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310736227] [2021-05-22 01:32:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310736227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:33,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:33,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:32:33,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016916176] [2021-05-22 01:32:33,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:33,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:33,118 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) [2021-05-22 01:32:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:38,615 INFO L93 Difference]: Finished difference Result 367283 states and 2180365 transitions. [2021-05-22 01:32:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:32:38,615 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 [2021-05-22 01:32:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:41,583 INFO L225 Difference]: With dead ends: 367283 [2021-05-22 01:32:41,584 INFO L226 Difference]: Without dead ends: 349507 [2021-05-22 01:32:41,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349507 states. [2021-05-22 01:32:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349507 to 203215. [2021-05-22 01:32:56,536 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) [2021-05-22 01:32:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203215 states to 203215 states and 1210120 transitions. [2021-05-22 01:32:58,737 INFO L78 Accepts]: Start accepts. Automaton has 203215 states and 1210120 transitions. Word has length 16 [2021-05-22 01:32:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:58,737 INFO L482 AbstractCegarLoop]: Abstraction has 203215 states and 1210120 transitions. [2021-05-22 01:32:58,737 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) [2021-05-22 01:32:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 203215 states and 1210120 transitions. [2021-05-22 01:32:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 01:32:58,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:58,805 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] [2021-05-22 01:32:58,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 01:32:58,805 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1278972565, now seen corresponding path program 1 times [2021-05-22 01:32:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:58,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448430959] [2021-05-22 01:32:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:58,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:58,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448430959] [2021-05-22 01:32:58,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448430959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:58,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:58,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:58,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090019801] [2021-05-22 01:32:58,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:32:58,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:58,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:32:58,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:32:58,856 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) [2021-05-22 01:33:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:33:03,680 INFO L93 Difference]: Finished difference Result 261890 states and 1576557 transitions. [2021-05-22 01:33:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:33:03,681 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 [2021-05-22 01:33:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:33:06,979 INFO L225 Difference]: With dead ends: 261890 [2021-05-22 01:33:06,979 INFO L226 Difference]: Without dead ends: 233801 [2021-05-22 01:33:06,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:33:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233801 states. [2021-05-22 01:33:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233801 to 169538. [2021-05-22 01:33:19,093 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) [2021-05-22 01:33:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169538 states to 169538 states and 1007174 transitions. [2021-05-22 01:33:21,018 INFO L78 Accepts]: Start accepts. Automaton has 169538 states and 1007174 transitions. Word has length 20 [2021-05-22 01:33:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:33:21,018 INFO L482 AbstractCegarLoop]: Abstraction has 169538 states and 1007174 transitions. [2021-05-22 01:33:21,018 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) [2021-05-22 01:33:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 169538 states and 1007174 transitions. [2021-05-22 01:33:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 01:33:21,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:21,056 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] [2021-05-22 01:33:21,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 01:33:21,056 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:33:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1930385074, now seen corresponding path program 1 times [2021-05-22 01:33:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971825025] [2021-05-22 01:33:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:33:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:33:21,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:33:21,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971825025] [2021-05-22 01:33:21,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971825025] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:33:21,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:33:21,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:33:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942560445] [2021-05-22 01:33:21,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:33:21,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:33:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:33:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:33:21,123 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) [2021-05-22 01:33:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:33:21,589 INFO L93 Difference]: Finished difference Result 26723 states and 177258 transitions. [2021-05-22 01:33:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:33:21,590 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 [2021-05-22 01:33:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:33:21,592 INFO L225 Difference]: With dead ends: 26723 [2021-05-22 01:33:21,592 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:33:21,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:33:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:33:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:33:21,592 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) [2021-05-22 01:33:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:33:21,592 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-05-22 01:33:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:33:21,592 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:33:21,593 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) [2021-05-22 01:33:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:33:21,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:33:21,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 01:33:21,594 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:33:21,594 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:33:21,595 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:33:21,595 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:33:21,595 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:33:21,595 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:33:21,596 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:33:21,596 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:33:21,596 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:33:21,596 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:33:21,598 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2021-05-22 01:33:39,793 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) [2021-05-22 01:33:39,885 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) [2021-05-22 01:33:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:33:39,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:39,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:33:39,888 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:33:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:39,888 INFO L82 PathProgramCache]: Analyzing trace with hash -817562652, now seen corresponding path program 1 times [2021-05-22 01:33:39,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:39,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808737513] [2021-05-22 01:33:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:33:39,891 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:33:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:33:39,893 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:33:39,894 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:33:39,894 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:33:39,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 01:33:39,894 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:33:39,895 WARN L242 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:33:39,895 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-05-22 01:33:39,926 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:33:39,926 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-05-22 01:33:39,927 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:33:39,927 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:33:39,927 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:33:39,927 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:33:39,927 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:33:39,927 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:33:39,927 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:33:39,927 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:33:39,927 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 45 transitions, 167 flow [2021-05-22 01:43:00,614 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) [2021-05-22 01:43:01,031 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) [2021-05-22 01:43:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:43:01,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:43:01,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:43:01,032 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:43:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:43:01,032 INFO L82 PathProgramCache]: Analyzing trace with hash 6969103, now seen corresponding path program 1 times [2021-05-22 01:43:01,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:43:01,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186903201] [2021-05-22 01:43:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:43:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:43:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:43:01,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:43:01,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186903201] [2021-05-22 01:43:01,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186903201] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:43:01,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:43:01,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:43:01,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047557227] [2021-05-22 01:43:01,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 01:43:01,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:43:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 01:43:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 01:43:01,447 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) [2021-05-22 01:43:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:43:14,977 INFO L93 Difference]: Finished difference Result 810902 states and 5756895 transitions. [2021-05-22 01:43:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 01:43:14,981 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 [2021-05-22 01:43:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:43:27,282 INFO L225 Difference]: With dead ends: 810902 [2021-05-22 01:43:27,282 INFO L226 Difference]: Without dead ends: 810757 [2021-05-22 01:43:27,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown