/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:12:12,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:12:12,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:12:12,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:12:12,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:12:12,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:12:12,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:12:12,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:12:12,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:12:12,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:12:12,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:12:12,233 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:12:12,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:12:12,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:12:12,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:12:12,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:12:12,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:12:12,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:12:12,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:12:12,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:12:12,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:12:12,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:12:12,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:12:12,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:12:12,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:12:12,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:12:12,525 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:12:12,526 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:12:12,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-06-12 20:12:12,527 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-06-12 20:12:12,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:12:12,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:12:12,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:12:12,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:12:12,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:12:12,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:12:12,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:12:12,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:12:12,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:12:12,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... [2021-06-12 20:12:12,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:12:12,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:12:12,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:12:12,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:12:12,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:12:12,754 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:12:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:12:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:12:12,754 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:12:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:12:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:12:12,754 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:12:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:12:12,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:12:12,755 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:12:13,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:12:13,479 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-12 20:12:13,481 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:12:13 BoogieIcfgContainer [2021-06-12 20:12:13,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:12:13,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:12:13,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:12:13,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:12:13,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:12:12" (1/2) ... [2021-06-12 20:12:13,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e4ce0 and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:12:13, skipping insertion in model container [2021-06-12 20:12:13,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:12:13" (2/2) ... [2021-06-12 20:12:13,489 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-06-12 20:12:13,493 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:12:13,493 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:12:13,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:12:13,494 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:12:13,531 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:12:13,546 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:12:13,561 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:12:13,561 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:12:13,561 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:12:13,561 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:12:13,561 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:12:13,561 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:12:13,561 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:12:13,561 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:12:13,578 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-06-12 20:12:13,591 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 20:12:13,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:13,611 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:13,611 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-06-12 20:12:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:13,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778732966] [2021-06-12 20:12:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:14,292 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-06-12 20:12:14,760 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-12 20:12:15,299 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-06-12 20:12:15,451 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2021-06-12 20:12:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:15,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778732966] [2021-06-12 20:12:15,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778732966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:15,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:15,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:12:15,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908878594] [2021-06-12 20:12:15,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:12:15,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:12:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:12:15,468 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:15,708 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 20:12:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:15,741 INFO L93 Difference]: Finished difference Result 66 states and 158 transitions. [2021-06-12 20:12:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:12:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 20:12:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:15,748 INFO L225 Difference]: With dead ends: 66 [2021-06-12 20:12:15,748 INFO L226 Difference]: Without dead ends: 59 [2021-06-12 20:12:15,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:12:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-12 20:12:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-06-12 20:12:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-06-12 20:12:15,813 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-06-12 20:12:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:15,814 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-06-12 20:12:15,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-06-12 20:12:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 20:12:15,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:15,815 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:15,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:12:15,815 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:15,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-06-12 20:12:15,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:15,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629503387] [2021-06-12 20:12:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,257 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-06-12 20:12:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629503387] [2021-06-12 20:12:16,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629503387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:12:16,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320121231] [2021-06-12 20:12:16,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:12:16,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:12:16,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:12:16,317 INFO L87 Difference]: Start difference. First operand 44 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,509 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 20:12:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,535 INFO L93 Difference]: Finished difference Result 66 states and 156 transitions. [2021-06-12 20:12:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:12:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 20:12:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,539 INFO L225 Difference]: With dead ends: 66 [2021-06-12 20:12:16,539 INFO L226 Difference]: Without dead ends: 59 [2021-06-12 20:12:16,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:12:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-12 20:12:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-12 20:12:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-06-12 20:12:16,547 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-06-12 20:12:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,548 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-06-12 20:12:16,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-06-12 20:12:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 20:12:16,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,548 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:12:16,549 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash 911266216, now seen corresponding path program 1 times [2021-06-12 20:12:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824854804] [2021-06-12 20:12:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824854804] [2021-06-12 20:12:16,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824854804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774333375] [2021-06-12 20:12:16,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,574 INFO L87 Difference]: Start difference. First operand 46 states and 126 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,586 INFO L93 Difference]: Finished difference Result 52 states and 141 transitions. [2021-06-12 20:12:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-12 20:12:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,589 INFO L225 Difference]: With dead ends: 52 [2021-06-12 20:12:16,589 INFO L226 Difference]: Without dead ends: 52 [2021-06-12 20:12:16,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-12 20:12:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-12 20:12:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-06-12 20:12:16,593 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-06-12 20:12:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,593 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-06-12 20:12:16,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-06-12 20:12:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 20:12:16,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,594 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:12:16,594 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-06-12 20:12:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563448067] [2021-06-12 20:12:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563448067] [2021-06-12 20:12:16,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563448067] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396790296] [2021-06-12 20:12:16,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,626 INFO L87 Difference]: Start difference. First operand 52 states and 141 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,631 INFO L93 Difference]: Finished difference Result 58 states and 156 transitions. [2021-06-12 20:12:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-12 20:12:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,632 INFO L225 Difference]: With dead ends: 58 [2021-06-12 20:12:16,632 INFO L226 Difference]: Without dead ends: 58 [2021-06-12 20:12:16,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-12 20:12:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-06-12 20:12:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-06-12 20:12:16,641 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-06-12 20:12:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,641 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-06-12 20:12:16,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-06-12 20:12:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 20:12:16,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,642 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:12:16,642 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-06-12 20:12:16,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863016653] [2021-06-12 20:12:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863016653] [2021-06-12 20:12:16,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863016653] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733638665] [2021-06-12 20:12:16,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,695 INFO L87 Difference]: Start difference. First operand 58 states and 156 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,715 INFO L93 Difference]: Finished difference Result 66 states and 175 transitions. [2021-06-12 20:12:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-12 20:12:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,717 INFO L225 Difference]: With dead ends: 66 [2021-06-12 20:12:16,717 INFO L226 Difference]: Without dead ends: 66 [2021-06-12 20:12:16,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-12 20:12:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-06-12 20:12:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6923076923076925) internal successors, (175), 65 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-06-12 20:12:16,721 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-06-12 20:12:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,721 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-06-12 20:12:16,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-06-12 20:12:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 20:12:16,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,722 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:12:16,722 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-06-12 20:12:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551001817] [2021-06-12 20:12:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551001817] [2021-06-12 20:12:16,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551001817] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526718489] [2021-06-12 20:12:16,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,737 INFO L87 Difference]: Start difference. First operand 66 states and 175 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,743 INFO L93 Difference]: Finished difference Result 74 states and 194 transitions. [2021-06-12 20:12:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-12 20:12:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,744 INFO L225 Difference]: With dead ends: 74 [2021-06-12 20:12:16,744 INFO L226 Difference]: Without dead ends: 74 [2021-06-12 20:12:16,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-12 20:12:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-06-12 20:12:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.6575342465753424) internal successors, (194), 73 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-06-12 20:12:16,748 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-06-12 20:12:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,757 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-06-12 20:12:16,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-06-12 20:12:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 20:12:16,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,758 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:12:16,758 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-06-12 20:12:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232765815] [2021-06-12 20:12:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:12:16,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232765815] [2021-06-12 20:12:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232765815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111485293] [2021-06-12 20:12:16,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,775 INFO L87 Difference]: Start difference. First operand 74 states and 194 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,788 INFO L93 Difference]: Finished difference Result 100 states and 228 transitions. [2021-06-12 20:12:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 20:12:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,790 INFO L225 Difference]: With dead ends: 100 [2021-06-12 20:12:16,790 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 20:12:16,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 20:12:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-12 20:12:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-06-12 20:12:16,798 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-06-12 20:12:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,798 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-06-12 20:12:16,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-06-12 20:12:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 20:12:16,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,799 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:12:16,799 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-06-12 20:12:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723448619] [2021-06-12 20:12:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:12:16,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723448619] [2021-06-12 20:12:16,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723448619] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446361972] [2021-06-12 20:12:16,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,856 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,879 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-06-12 20:12:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 20:12:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,880 INFO L225 Difference]: With dead ends: 82 [2021-06-12 20:12:16,880 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 20:12:16,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 20:12:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-06-12 20:12:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-06-12 20:12:16,884 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-06-12 20:12:16,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,884 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-06-12 20:12:16,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-06-12 20:12:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 20:12:16,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,884 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:12:16,885 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-06-12 20:12:16,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079761029] [2021-06-12 20:12:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:12:16,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079761029] [2021-06-12 20:12:16,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079761029] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934622722] [2021-06-12 20:12:16,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,914 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,924 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2021-06-12 20:12:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 20:12:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,925 INFO L225 Difference]: With dead ends: 82 [2021-06-12 20:12:16,925 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 20:12:16,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 20:12:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-06-12 20:12:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-06-12 20:12:16,927 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-06-12 20:12:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,928 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-06-12 20:12:16,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-06-12 20:12:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 20:12:16,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,928 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:12:16,928 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-06-12 20:12:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653865180] [2021-06-12 20:12:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:12:16,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653865180] [2021-06-12 20:12:16,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653865180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:12:16,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:12:16,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:12:16,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513511794] [2021-06-12 20:12:16,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:12:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:12:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,955 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,972 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-06-12 20:12:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:12:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 20:12:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,973 INFO L225 Difference]: With dead ends: 82 [2021-06-12 20:12:16,973 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 20:12:16,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:12:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 20:12:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-06-12 20:12:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-06-12 20:12:16,975 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-06-12 20:12:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,975 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-06-12 20:12:16,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-06-12 20:12:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:12:16,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,976 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 20:12:16,976 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-06-12 20:12:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145014780] [2021-06-12 20:12:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:17,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:17,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145014780] [2021-06-12 20:12:17,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145014780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:17,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100334254] [2021-06-12 20:12:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:17,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:12:17,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:17,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100334254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:17,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:17,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:12:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569012529] [2021-06-12 20:12:17,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:12:17,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:12:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:12:17,912 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:18,074 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-12 20:12:18,245 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-12 20:12:18,403 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-12 20:12:18,591 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-12 20:12:18,775 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-12 20:12:18,969 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-12 20:12:19,099 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-12 20:12:19,276 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 20:12:19,446 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-12 20:12:19,757 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-12 20:12:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:19,796 INFO L93 Difference]: Finished difference Result 133 states and 272 transitions. [2021-06-12 20:12:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:12:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 14 [2021-06-12 20:12:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:19,803 INFO L225 Difference]: With dead ends: 133 [2021-06-12 20:12:19,803 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 20:12:19,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2200.3ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 20:12:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-06-12 20:12:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-12 20:12:19,806 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-06-12 20:12:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:19,806 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-12 20:12:19,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-12 20:12:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:12:19,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:19,807 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:20,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 20:12:20,021 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-06-12 20:12:20,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:20,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023044230] [2021-06-12 20:12:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:20,190 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-12 20:12:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:20,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:20,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023044230] [2021-06-12 20:12:20,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023044230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:20,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299072596] [2021-06-12 20:12:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:20,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:20,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:20,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:12:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:20,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299072596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:20,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:20,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:12:20,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526326681] [2021-06-12 20:12:20,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:12:20,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:12:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:12:20,667 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:21,017 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-12 20:12:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:12:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 14 [2021-06-12 20:12:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:21,018 INFO L225 Difference]: With dead ends: 105 [2021-06-12 20:12:21,018 INFO L226 Difference]: Without dead ends: 98 [2021-06-12 20:12:21,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:12:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-12 20:12:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-06-12 20:12:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-06-12 20:12:21,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-06-12 20:12:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:21,020 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-06-12 20:12:21,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-06-12 20:12:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:12:21,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:21,021 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:21,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:12:21,221 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-06-12 20:12:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132186504] [2021-06-12 20:12:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:21,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132186504] [2021-06-12 20:12:21,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132186504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222454170] [2021-06-12 20:12:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:21,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:12:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:21,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222454170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:21,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:21,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:12:21,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252225207] [2021-06-12 20:12:21,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:12:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:12:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:12:21,669 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:22,009 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-06-12 20:12:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:12:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 14 [2021-06-12 20:12:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:22,010 INFO L225 Difference]: With dead ends: 108 [2021-06-12 20:12:22,010 INFO L226 Difference]: Without dead ends: 101 [2021-06-12 20:12:22,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:12:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-12 20:12:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-12 20:12:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-12 20:12:22,012 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-06-12 20:12:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:22,012 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-12 20:12:22,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-12 20:12:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:12:22,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:22,013 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:22,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:12:22,221 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-06-12 20:12:22,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:22,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634019100] [2021-06-12 20:12:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:22,517 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 20:12:22,761 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 20:12:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:22,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634019100] [2021-06-12 20:12:22,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634019100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:22,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894233460] [2021-06-12 20:12:22,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:22,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:22,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:12:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:23,329 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-12 20:12:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:23,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894233460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:23,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:23,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:12:23,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984926757] [2021-06-12 20:12:23,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:12:23,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:23,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:12:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:12:23,427 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:23,891 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-12 20:12:24,043 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 20:12:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:24,181 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-06-12 20:12:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:12:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 14 [2021-06-12 20:12:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:24,182 INFO L225 Difference]: With dead ends: 120 [2021-06-12 20:12:24,182 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 20:12:24,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1389.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:12:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 20:12:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-06-12 20:12:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-06-12 20:12:24,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-06-12 20:12:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:24,184 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-06-12 20:12:24,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-06-12 20:12:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:12:24,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:24,185 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:24,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:24,401 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-06-12 20:12:24,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:24,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480736270] [2021-06-12 20:12:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:24,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:24,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480736270] [2021-06-12 20:12:24,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480736270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:24,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583287740] [2021-06-12 20:12:24,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:24,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:24,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:12:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:25,033 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 20:12:29,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:12:29,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,138 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,146 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,152 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,160 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,166 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,175 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-12 20:12:29,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,192 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,201 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,208 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-12 20:12:29,216 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,226 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,232 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,239 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,246 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,253 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,260 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,267 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,273 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,279 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,286 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,291 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,297 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,303 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,309 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,320 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,328 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,334 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-12 20:12:29,341 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,347 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,352 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,358 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,363 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,375 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,382 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,389 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,394 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,400 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-12 20:12:29,410 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,418 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,422 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,428 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,432 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,440 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,446 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,452 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-12 20:12:29,458 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,463 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,467 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,472 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,478 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,490 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,496 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,501 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,505 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,509 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,515 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,520 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:12:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-12 20:12:29,525 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,537 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,541 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,547 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,552 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,556 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,560 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,564 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,568 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,573 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,577 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,581 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,585 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,589 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,594 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,597 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,687 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.5 percent of original size [2021-06-12 20:12:29,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 20:12:29,692 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:12:29,696 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:12:29,699 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:12:29,704 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-12 20:12:29,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:12:29,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:12:29,730 INFO L247 ElimStorePlain]: Needed 85 recursive calls to eliminate 3 variables, input treesize:4202, output treesize:38 [2021-06-12 20:12:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583287740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:29,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:29,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:12:29,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451575368] [2021-06-12 20:12:29,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:12:29,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:12:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:12:29,782 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:29,973 INFO L93 Difference]: Finished difference Result 93 states and 184 transitions. [2021-06-12 20:12:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:12:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 14 [2021-06-12 20:12:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:29,974 INFO L225 Difference]: With dead ends: 93 [2021-06-12 20:12:29,974 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 20:12:29,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 703.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:12:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 20:12:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-06-12 20:12:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-12 20:12:29,976 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 14 [2021-06-12 20:12:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:29,976 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-12 20:12:29,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-12 20:12:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:12:29,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:29,976 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:30,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 20:12:30,195 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:30,195 INFO L82 PathProgramCache]: Analyzing trace with hash 685771365, now seen corresponding path program 1 times [2021-06-12 20:12:30,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:30,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439123070] [2021-06-12 20:12:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:30,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439123070] [2021-06-12 20:12:30,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439123070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457813511] [2021-06-12 20:12:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:12:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:30,945 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-12 20:12:31,163 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown