/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/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 18:45:50,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 18:45:50,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 18:45:50,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 18:45:50,717 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 18:45:50,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 18:45:50,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 18:45:50,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 18:45:50,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 18:45:50,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 18:45:50,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 18:45:50,741 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 18:45:50,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 18:45:50,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 18:45:50,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 18:45:50,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 18:45:50,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 18:45:50,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 18:45:50,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 18:45:50,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 18:45:51,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 18:45:51,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 18:45:51,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 18:45:51,039 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 18:45:51,040 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 18:45:51,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2021-06-12 18:45:51,041 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2021-06-12 18:45:51,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 18:45:51,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 18:45:51,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 18:45:51,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 18:45:51,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 18:45:51,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 18:45:51,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 18:45:51,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 18:45:51,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 18:45:51,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/1) ... [2021-06-12 18:45:51,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 18:45:51,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 18:45:51,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 18:45:51,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 18:45:51,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (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 18:45:51,177 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 18:45:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 18:45:51,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 18:45:51,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2021-06-12 18:45:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2021-06-12 18:45:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2021-06-12 18:45:51,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2021-06-12 18:45:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2021-06-12 18:45:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2021-06-12 18:45:51,180 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 18:45:51,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 18:45:51,313 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 18:45:51,315 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:45:51 BoogieIcfgContainer [2021-06-12 18:45:51,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 18:45:51,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 18:45:51,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 18:45:51,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 18:45:51,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:45:51" (1/2) ... [2021-06-12 18:45:51,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585f0f7f and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 06:45:51, skipping insertion in model container [2021-06-12 18:45:51,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:45:51" (2/2) ... [2021-06-12 18:45:51,321 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2021-06-12 18:45:51,329 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 18:45:51,329 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 18:45:51,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 18:45:51,330 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 18:45:51,387 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 18:45:51,401 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 18:45:51,414 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 18:45:51,414 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 18:45:51,414 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 18:45:51,414 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 18:45:51,415 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 18:45:51,415 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 18:45:51,415 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 18:45:51,415 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 18:45:51,420 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2021-06-12 18:45:51,429 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:45:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:45:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 18:45:51,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:51,436 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:51,437 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1474916704, now seen corresponding path program 1 times [2021-06-12 18:45:51,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:51,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217259294] [2021-06-12 18:45:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:51,548 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 18:45:51,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:51,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217259294] [2021-06-12 18:45:51,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217259294] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:45:51,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 18:45:51,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-12 18:45:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16762293] [2021-06-12 18:45:51,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 18:45:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 18:45:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 18:45:51,569 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 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 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 18:45:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:51,613 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-12 18:45:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 18:45:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 18:45:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:51,620 INFO L225 Difference]: With dead ends: 63 [2021-06-12 18:45:51,620 INFO L226 Difference]: Without dead ends: 52 [2021-06-12 18:45:51,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 18:45:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-12 18:45:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-06-12 18:45:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:45:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-12 18:45:51,651 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2021-06-12 18:45:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:51,652 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-12 18:45:51,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 18:45:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-12 18:45:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 18:45:51,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:51,653 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:51,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 18:45:51,653 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2103181474, now seen corresponding path program 1 times [2021-06-12 18:45:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:51,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261939794] [2021-06-12 18:45:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:51,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:51,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261939794] [2021-06-12 18:45:51,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261939794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:51,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37854468] [2021-06-12 18:45:51,697 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 18:45:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 18:45:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:51,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37854468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:51,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:51,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 18:45:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542941320] [2021-06-12 18:45:51,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:51,794 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:45:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:51,854 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-06-12 18:45:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 18:45:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 18:45:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:51,855 INFO L225 Difference]: With dead ends: 78 [2021-06-12 18:45:51,855 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 18:45:51,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 18:45:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-06-12 18:45:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:45:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-12 18:45:51,862 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-12 18:45:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:51,862 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-12 18:45:51,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:45:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-12 18:45:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 18:45:51,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:51,863 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:52,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 18:45:52,066 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:52,066 INFO L82 PathProgramCache]: Analyzing trace with hash -85551518, now seen corresponding path program 1 times [2021-06-12 18:45:52,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:52,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404609504] [2021-06-12 18:45:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:52,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:52,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404609504] [2021-06-12 18:45:52,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404609504] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:45:52,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 18:45:52,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 18:45:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293869480] [2021-06-12 18:45:52,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 18:45:52,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 18:45:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 18:45:52,097 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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 18:45:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:52,111 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2021-06-12 18:45:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 18:45:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 18:45:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:52,112 INFO L225 Difference]: With dead ends: 51 [2021-06-12 18:45:52,112 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 18:45:52,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 18:45:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 18:45:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-06-12 18:45:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:45:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-12 18:45:52,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-06-12 18:45:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:52,122 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-12 18:45:52,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) 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 18:45:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-12 18:45:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 18:45:52,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:52,123 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:52,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 18:45:52,123 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1933209310, now seen corresponding path program 2 times [2021-06-12 18:45:52,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:52,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183362379] [2021-06-12 18:45:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:52,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:52,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183362379] [2021-06-12 18:45:52,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183362379] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:45:52,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 18:45:52,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 18:45:52,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224157725] [2021-06-12 18:45:52,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 18:45:52,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:52,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 18:45:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 18:45:52,171 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 18:45:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:52,208 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-06-12 18:45:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 18:45:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 18:45:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:52,209 INFO L225 Difference]: With dead ends: 48 [2021-06-12 18:45:52,209 INFO L226 Difference]: Without dead ends: 48 [2021-06-12 18:45:52,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 18:45:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-12 18:45:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-06-12 18:45:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:45:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2021-06-12 18:45:52,215 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2021-06-12 18:45:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:52,215 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2021-06-12 18:45:52,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 18:45:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2021-06-12 18:45:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 18:45:52,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:52,216 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:52,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 18:45:52,225 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1742393248, now seen corresponding path program 1 times [2021-06-12 18:45:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:52,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987932419] [2021-06-12 18:45:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:52,284 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 18:45:52,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987932419] [2021-06-12 18:45:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987932419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013623938] [2021-06-12 18:45:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:45:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:52,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:52,344 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 18:45:52,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013623938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:52,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:52,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-06-12 18:45:52,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661658144] [2021-06-12 18:45:52,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 18:45:52,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 18:45:52,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 18:45:52,346 INFO L87 Difference]: Start difference. First operand 44 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 18:45:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:52,374 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-12 18:45:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 18:45:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 18:45:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:52,377 INFO L225 Difference]: With dead ends: 107 [2021-06-12 18:45:52,377 INFO L226 Difference]: Without dead ends: 98 [2021-06-12 18:45:52,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 18:45:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-12 18:45:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-06-12 18:45:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:45:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2021-06-12 18:45:52,395 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2021-06-12 18:45:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:52,395 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2021-06-12 18:45:52,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 18:45:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2021-06-12 18:45:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 18:45:52,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:52,396 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:52,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:52,597 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1371911392, now seen corresponding path program 2 times [2021-06-12 18:45:52,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:52,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515669952] [2021-06-12 18:45:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:45:52,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:52,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515669952] [2021-06-12 18:45:52,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515669952] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:45:52,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 18:45:52,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 18:45:52,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837484359] [2021-06-12 18:45:52,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 18:45:52,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:52,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 18:45:52,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 18:45:52,652 INFO L87 Difference]: Start difference. First operand 70 states and 146 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 18:45:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:52,674 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2021-06-12 18:45:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 18:45:52,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 18:45:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:52,675 INFO L225 Difference]: With dead ends: 127 [2021-06-12 18:45:52,675 INFO L226 Difference]: Without dead ends: 118 [2021-06-12 18:45:52,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 18:45:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-12 18:45:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-06-12 18:45:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 18:45:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-06-12 18:45:52,683 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2021-06-12 18:45:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:52,683 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-06-12 18:45:52,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 18:45:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-06-12 18:45:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:52,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:52,684 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:52,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 18:45:52,685 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1755689310, now seen corresponding path program 3 times [2021-06-12 18:45:52,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:52,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641596413] [2021-06-12 18:45:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:52,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:52,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641596413] [2021-06-12 18:45:52,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641596413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:52,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584945148] [2021-06-12 18:45:52,738 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 18:45:52,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 18:45:52,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:52,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:52,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584945148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:52,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:52,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 18:45:52,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036841051] [2021-06-12 18:45:52,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:52,809 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:52,887 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2021-06-12 18:45:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 18:45:52,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:52,889 INFO L225 Difference]: With dead ends: 176 [2021-06-12 18:45:52,889 INFO L226 Difference]: Without dead ends: 176 [2021-06-12 18:45:52,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:45:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-12 18:45:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2021-06-12 18:45:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 18:45:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-06-12 18:45:52,909 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2021-06-12 18:45:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:52,909 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-06-12 18:45:52,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-06-12 18:45:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:52,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:52,910 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:53,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:53,121 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash -627140766, now seen corresponding path program 4 times [2021-06-12 18:45:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:53,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326599743] [2021-06-12 18:45:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:53,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326599743] [2021-06-12 18:45:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326599743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481970236] [2021-06-12 18:45:53,152 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 18:45:53,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 18:45:53,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:53,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481970236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:53,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:53,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 18:45:53,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558922902] [2021-06-12 18:45:53,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:53,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:53,228 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:53,282 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2021-06-12 18:45:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 18:45:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:53,283 INFO L225 Difference]: With dead ends: 161 [2021-06-12 18:45:53,284 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 18:45:53,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 18:45:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 18:45:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2021-06-12 18:45:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1981981981981984) internal successors, (244), 111 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 18:45:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2021-06-12 18:45:53,295 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2021-06-12 18:45:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:53,295 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2021-06-12 18:45:53,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2021-06-12 18:45:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:53,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:53,300 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:53,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:53,521 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2026275120, now seen corresponding path program 5 times [2021-06-12 18:45:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:53,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625479641] [2021-06-12 18:45:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:53,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:53,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625479641] [2021-06-12 18:45:53,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625479641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:53,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907099913] [2021-06-12 18:45:53,544 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 18:45:53,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 18:45:53,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:53,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907099913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:53,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:53,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 18:45:53,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345389527] [2021-06-12 18:45:53,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:53,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:53,638 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:53,708 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2021-06-12 18:45:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 18:45:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:53,709 INFO L225 Difference]: With dead ends: 154 [2021-06-12 18:45:53,709 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 18:45:53,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:45:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 18:45:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2021-06-12 18:45:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1743119266055047) internal successors, (237), 109 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 18:45:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2021-06-12 18:45:53,712 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2021-06-12 18:45:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:53,712 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2021-06-12 18:45:53,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2021-06-12 18:45:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:53,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:53,714 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:53,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:53,929 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1537391890, now seen corresponding path program 6 times [2021-06-12 18:45:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:53,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744672394] [2021-06-12 18:45:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:53,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:53,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744672394] [2021-06-12 18:45:53,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744672394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:53,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587142933] [2021-06-12 18:45:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 18:45:53,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 18:45:53,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:53,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:54,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587142933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:54,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:54,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 18:45:54,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907144676] [2021-06-12 18:45:54,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:54,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:54,030 INFO L87 Difference]: Start difference. First operand 110 states and 237 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:54,086 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2021-06-12 18:45:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 18:45:54,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:54,087 INFO L225 Difference]: With dead ends: 144 [2021-06-12 18:45:54,087 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 18:45:54,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:45:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 18:45:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-12 18:45:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 18:45:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-12 18:45:54,090 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2021-06-12 18:45:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:54,091 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-12 18:45:54,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:45:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-12 18:45:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:54,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:54,091 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:54,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:54,305 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2099418526, now seen corresponding path program 7 times [2021-06-12 18:45:54,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:54,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558655989] [2021-06-12 18:45:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:54,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:54,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558655989] [2021-06-12 18:45:54,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558655989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:54,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294930982] [2021-06-12 18:45:54,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:45:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294930982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:54,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:54,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 18:45:54,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477364726] [2021-06-12 18:45:54,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:54,408 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:54,467 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2021-06-12 18:45:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 18:45:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:54,469 INFO L225 Difference]: With dead ends: 195 [2021-06-12 18:45:54,469 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 18:45:54,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:45:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 18:45:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2021-06-12 18:45:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 18:45:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2021-06-12 18:45:54,472 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2021-06-12 18:45:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:54,473 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2021-06-12 18:45:54,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2021-06-12 18:45:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:54,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:54,473 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:54,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:54,693 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:54,693 INFO L82 PathProgramCache]: Analyzing trace with hash -177918814, now seen corresponding path program 8 times [2021-06-12 18:45:54,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:54,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221686278] [2021-06-12 18:45:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:54,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221686278] [2021-06-12 18:45:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221686278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743155886] [2021-06-12 18:45:54,730 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 18:45:54,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 18:45:54,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:45:54,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743155886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:54,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:54,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 18:45:54,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235181064] [2021-06-12 18:45:54,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:54,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:54,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:54,798 INFO L87 Difference]: Start difference. First operand 122 states and 266 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:54,846 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2021-06-12 18:45:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 18:45:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:54,847 INFO L225 Difference]: With dead ends: 177 [2021-06-12 18:45:54,847 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 18:45:54,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:45:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 18:45:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-06-12 18:45:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.251968503937008) internal successors, (286), 127 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:45:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2021-06-12 18:45:54,850 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2021-06-12 18:45:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:54,851 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2021-06-12 18:45:54,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2021-06-12 18:45:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:54,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:54,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:55,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 18:45:55,065 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash -523408140, now seen corresponding path program 9 times [2021-06-12 18:45:55,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:55,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864775927] [2021-06-12 18:45:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:55,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864775927] [2021-06-12 18:45:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864775927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353073003] [2021-06-12 18:45:55,089 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:55,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 18:45:55,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:45:55,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353073003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:55,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:55,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 18:45:55,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304978130] [2021-06-12 18:45:55,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:55,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:55,150 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:55,201 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2021-06-12 18:45:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 18:45:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:55,203 INFO L225 Difference]: With dead ends: 184 [2021-06-12 18:45:55,203 INFO L226 Difference]: Without dead ends: 184 [2021-06-12 18:45:55,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:45:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-12 18:45:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2021-06-12 18:45:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 18:45:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-06-12 18:45:55,209 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2021-06-12 18:45:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:55,209 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-06-12 18:45:55,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-06-12 18:45:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:55,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:55,209 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:55,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:55,421 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1012291370, now seen corresponding path program 10 times [2021-06-12 18:45:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343629860] [2021-06-12 18:45:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:55,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:55,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343629860] [2021-06-12 18:45:55,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343629860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:55,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996909367] [2021-06-12 18:45:55,448 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:55,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 18:45:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:45:55,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996909367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:55,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:55,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 18:45:55,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047312389] [2021-06-12 18:45:55,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:45:55,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:55,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:45:55,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:45:55,510 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:55,557 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2021-06-12 18:45:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 18:45:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:55,559 INFO L225 Difference]: With dead ends: 192 [2021-06-12 18:45:55,559 INFO L226 Difference]: Without dead ends: 189 [2021-06-12 18:45:55,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:45:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-12 18:45:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2021-06-12 18:45:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.24031007751938) internal successors, (289), 129 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 18:45:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2021-06-12 18:45:55,563 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2021-06-12 18:45:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:55,564 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2021-06-12 18:45:55,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2021-06-12 18:45:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:55,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:55,564 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:55,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:55,773 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1596493520, now seen corresponding path program 11 times [2021-06-12 18:45:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:55,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246549995] [2021-06-12 18:45:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:55,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246549995] [2021-06-12 18:45:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246549995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190955970] [2021-06-12 18:45:55,794 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:55,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 18:45:55,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:55,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:55,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190955970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:55,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 18:45:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791895136] [2021-06-12 18:45:55,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:55,841 INFO L87 Difference]: Start difference. First operand 130 states and 289 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:55,916 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2021-06-12 18:45:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 18:45:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:55,917 INFO L225 Difference]: With dead ends: 173 [2021-06-12 18:45:55,917 INFO L226 Difference]: Without dead ends: 173 [2021-06-12 18:45:55,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:45:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-12 18:45:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-06-12 18:45:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.208) internal successors, (276), 125 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 18:45:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2021-06-12 18:45:55,920 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2021-06-12 18:45:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:55,920 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2021-06-12 18:45:55,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2021-06-12 18:45:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 18:45:55,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:55,921 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:56,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 18:45:56,137 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash -474435792, now seen corresponding path program 12 times [2021-06-12 18:45:56,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:56,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791831927] [2021-06-12 18:45:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:56,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:56,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791831927] [2021-06-12 18:45:56,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791831927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:56,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567179478] [2021-06-12 18:45:56,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:56,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 18:45:56,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:56,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 18:45:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:56,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567179478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:56,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:56,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 18:45:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954402167] [2021-06-12 18:45:56,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:56,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:56,224 INFO L87 Difference]: Start difference. First operand 126 states and 276 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:56,287 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-06-12 18:45:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 18:45:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 18:45:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:56,288 INFO L225 Difference]: With dead ends: 188 [2021-06-12 18:45:56,288 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 18:45:56,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 18:45:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 18:45:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-06-12 18:45:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 18:45:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-06-12 18:45:56,291 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2021-06-12 18:45:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:56,291 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-06-12 18:45:56,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:45:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-06-12 18:45:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 18:45:56,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:56,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:56,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 18:45:56,508 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash -734527072, now seen corresponding path program 13 times [2021-06-12 18:45:56,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:56,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509460285] [2021-06-12 18:45:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509460285] [2021-06-12 18:45:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509460285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557921527] [2021-06-12 18:45:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 18:45:56,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:56,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557921527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:56,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:56,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 18:45:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231664078] [2021-06-12 18:45:56,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 18:45:56,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 18:45:56,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 18:45:56,601 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:45:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:56,634 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2021-06-12 18:45:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 18:45:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 18:45:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:56,635 INFO L225 Difference]: With dead ends: 239 [2021-06-12 18:45:56,635 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 18:45:56,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 18:45:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 18:45:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2021-06-12 18:45:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 18:45:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-12 18:45:56,639 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2021-06-12 18:45:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:56,639 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-12 18:45:56,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:45:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-12 18:45:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 18:45:56,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:56,640 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:56,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 18:45:56,849 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash -655786976, now seen corresponding path program 14 times [2021-06-12 18:45:56,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:56,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757463736] [2021-06-12 18:45:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:45:56,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757463736] [2021-06-12 18:45:56,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757463736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:56,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405142175] [2021-06-12 18:45:56,881 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 18:45:56,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 18:45:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 18:45:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:56,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405142175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:56,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:56,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6] total 7 [2021-06-12 18:45:56,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895669584] [2021-06-12 18:45:56,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 18:45:56,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:56,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 18:45:56,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:45:56,995 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:57,095 INFO L93 Difference]: Finished difference Result 343 states and 728 transitions. [2021-06-12 18:45:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 18:45:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 18:45:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:57,098 INFO L225 Difference]: With dead ends: 343 [2021-06-12 18:45:57,098 INFO L226 Difference]: Without dead ends: 325 [2021-06-12 18:45:57,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 18:45:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-12 18:45:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 219. [2021-06-12 18:45:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.311926605504587) internal successors, (504), 218 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 18:45:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 504 transitions. [2021-06-12 18:45:57,103 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 504 transitions. Word has length 18 [2021-06-12 18:45:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:57,104 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 504 transitions. [2021-06-12 18:45:57,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 504 transitions. [2021-06-12 18:45:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 18:45:57,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:57,104 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:57,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:57,321 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash -779503072, now seen corresponding path program 15 times [2021-06-12 18:45:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:57,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883389002] [2021-06-12 18:45:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:45:57,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883389002] [2021-06-12 18:45:57,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883389002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072815847] [2021-06-12 18:45:57,347 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:57,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 18:45:57,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 18:45:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:45:57,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072815847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:57,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:57,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 18:45:57,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895599824] [2021-06-12 18:45:57,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 18:45:57,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 18:45:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 18:45:57,404 INFO L87 Difference]: Start difference. First operand 219 states and 504 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:45:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:57,438 INFO L93 Difference]: Finished difference Result 322 states and 711 transitions. [2021-06-12 18:45:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 18:45:57,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 18:45:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:57,439 INFO L225 Difference]: With dead ends: 322 [2021-06-12 18:45:57,439 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 18:45:57,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 18:45:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 18:45:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-06-12 18:45:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.3359375) internal successors, (598), 256 states have internal predecessors, (598), 0 states have call successors, (0), 0 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 18:45:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 598 transitions. [2021-06-12 18:45:57,444 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 598 transitions. Word has length 18 [2021-06-12 18:45:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:57,444 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 598 transitions. [2021-06-12 18:45:57,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:45:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 598 transitions. [2021-06-12 18:45:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:57,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:57,445 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:57,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:57,661 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash -853552034, now seen corresponding path program 16 times [2021-06-12 18:45:57,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:57,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557103412] [2021-06-12 18:45:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:57,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557103412] [2021-06-12 18:45:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557103412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032951532] [2021-06-12 18:45:57,689 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 18:45:57,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 18:45:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:57,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:57,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:57,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032951532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:57,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:57,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 18:45:57,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715880358] [2021-06-12 18:45:57,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 18:45:57,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 18:45:57,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:45:57,759 INFO L87 Difference]: Start difference. First operand 257 states and 598 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:57,855 INFO L93 Difference]: Finished difference Result 402 states and 849 transitions. [2021-06-12 18:45:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:45:57,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:45:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:57,857 INFO L225 Difference]: With dead ends: 402 [2021-06-12 18:45:57,857 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 18:45:57,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 18:45:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 18:45:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 241. [2021-06-12 18:45:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.325) internal successors, (558), 240 states have internal predecessors, (558), 0 states have call successors, (0), 0 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 18:45:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 558 transitions. [2021-06-12 18:45:57,862 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 558 transitions. Word has length 20 [2021-06-12 18:45:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:57,862 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 558 transitions. [2021-06-12 18:45:57,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 558 transitions. [2021-06-12 18:45:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:57,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:57,862 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:58,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:58,073 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1535686302, now seen corresponding path program 17 times [2021-06-12 18:45:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194932929] [2021-06-12 18:45:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:58,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194932929] [2021-06-12 18:45:58,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194932929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:58,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982366700] [2021-06-12 18:45:58,110 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:58,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 18:45:58,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:58,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:58,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982366700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:58,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:58,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 18:45:58,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437125181] [2021-06-12 18:45:58,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 18:45:58,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 18:45:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:45:58,172 INFO L87 Difference]: Start difference. First operand 241 states and 558 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:58,268 INFO L93 Difference]: Finished difference Result 375 states and 801 transitions. [2021-06-12 18:45:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:45:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:45:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:58,269 INFO L225 Difference]: With dead ends: 375 [2021-06-12 18:45:58,269 INFO L226 Difference]: Without dead ends: 358 [2021-06-12 18:45:58,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 18:45:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-12 18:45:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-06-12 18:45:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.3071161048689137) internal successors, (616), 267 states have internal predecessors, (616), 0 states have call successors, (0), 0 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 18:45:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 616 transitions. [2021-06-12 18:45:58,274 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 616 transitions. Word has length 20 [2021-06-12 18:45:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:58,274 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 616 transitions. [2021-06-12 18:45:58,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 616 transitions. [2021-06-12 18:45:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:58,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:58,275 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:58,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 18:45:58,492 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1142582700, now seen corresponding path program 18 times [2021-06-12 18:45:58,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:58,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018368968] [2021-06-12 18:45:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:58,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:58,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018368968] [2021-06-12 18:45:58,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018368968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:58,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760663787] [2021-06-12 18:45:58,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:58,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 18:45:58,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:58,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760663787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:58,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:58,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:45:58,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754032283] [2021-06-12 18:45:58,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:58,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:58,572 INFO L87 Difference]: Start difference. First operand 268 states and 616 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:58,642 INFO L93 Difference]: Finished difference Result 358 states and 767 transitions. [2021-06-12 18:45:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:45:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:45:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:58,644 INFO L225 Difference]: With dead ends: 358 [2021-06-12 18:45:58,644 INFO L226 Difference]: Without dead ends: 358 [2021-06-12 18:45:58,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:45:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-12 18:45:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2021-06-12 18:45:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.2610441767068274) internal successors, (563), 249 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 18:45:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 563 transitions. [2021-06-12 18:45:58,649 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 563 transitions. Word has length 20 [2021-06-12 18:45:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:58,649 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 563 transitions. [2021-06-12 18:45:58,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 563 transitions. [2021-06-12 18:45:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:58,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:58,649 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:58,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 18:45:58,865 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash 653699470, now seen corresponding path program 19 times [2021-06-12 18:45:58,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:58,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831116975] [2021-06-12 18:45:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:58,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831116975] [2021-06-12 18:45:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831116975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94650448] [2021-06-12 18:45:58,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:58,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:58,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94650448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:58,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:58,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:45:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841347339] [2021-06-12 18:45:58,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:58,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:58,947 INFO L87 Difference]: Start difference. First operand 250 states and 563 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:59,004 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-06-12 18:45:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 18:45:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:45:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:59,005 INFO L225 Difference]: With dead ends: 305 [2021-06-12 18:45:59,005 INFO L226 Difference]: Without dead ends: 302 [2021-06-12 18:45:59,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 18:45:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-12 18:45:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 250. [2021-06-12 18:45:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.2570281124497993) internal successors, (562), 249 states have internal predecessors, (562), 0 states have call successors, (0), 0 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 18:45:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 562 transitions. [2021-06-12 18:45:59,009 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 562 transitions. Word has length 20 [2021-06-12 18:45:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:59,010 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 562 transitions. [2021-06-12 18:45:59,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 562 transitions. [2021-06-12 18:45:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:59,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:59,010 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:59,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 18:45:59,225 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash -898528034, now seen corresponding path program 20 times [2021-06-12 18:45:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:59,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409036116] [2021-06-12 18:45:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:59,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:59,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409036116] [2021-06-12 18:45:59,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409036116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:59,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789568193] [2021-06-12 18:45:59,251 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 18:45:59,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 18:45:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:45:59,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789568193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:59,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:59,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:45:59,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962223709] [2021-06-12 18:45:59,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:45:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:45:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:45:59,306 INFO L87 Difference]: Start difference. First operand 250 states and 562 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:59,369 INFO L93 Difference]: Finished difference Result 417 states and 879 transitions. [2021-06-12 18:45:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:45:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:45:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:59,370 INFO L225 Difference]: With dead ends: 417 [2021-06-12 18:45:59,371 INFO L226 Difference]: Without dead ends: 417 [2021-06-12 18:45:59,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:45:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-12 18:45:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 268. [2021-06-12 18:45:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.2883895131086143) internal successors, (611), 267 states have internal predecessors, (611), 0 states have call successors, (0), 0 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 18:45:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 611 transitions. [2021-06-12 18:45:59,376 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 611 transitions. Word has length 20 [2021-06-12 18:45:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 611 transitions. [2021-06-12 18:45:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:45:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 611 transitions. [2021-06-12 18:45:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:59,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:59,376 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:45:59,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 18:45:59,593 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:45:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:45:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1119101922, now seen corresponding path program 21 times [2021-06-12 18:45:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:45:59,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932751446] [2021-06-12 18:45:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:45:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:45:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:45:59,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:45:59,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932751446] [2021-06-12 18:45:59,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932751446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:59,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400167502] [2021-06-12 18:45:59,615 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:45:59,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 18:45:59,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:45:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:45:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:45:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 18:45:59,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400167502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:45:59,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:45:59,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-12 18:45:59,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175159117] [2021-06-12 18:45:59,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 18:45:59,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:45:59,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 18:45:59,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 18:45:59,707 INFO L87 Difference]: Start difference. First operand 268 states and 611 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 18:45:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:45:59,942 INFO L93 Difference]: Finished difference Result 393 states and 847 transitions. [2021-06-12 18:45:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 18:45:59,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:45:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:45:59,943 INFO L225 Difference]: With dead ends: 393 [2021-06-12 18:45:59,943 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 18:45:59,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-12 18:45:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 18:45:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 237. [2021-06-12 18:45:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.3220338983050848) internal successors, (548), 236 states have internal predecessors, (548), 0 states have call successors, (0), 0 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 18:45:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 548 transitions. [2021-06-12 18:45:59,947 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 548 transitions. Word has length 20 [2021-06-12 18:45:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:45:59,947 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 548 transitions. [2021-06-12 18:45:59,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 18:45:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 548 transitions. [2021-06-12 18:45:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:45:59,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:45:59,948 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:00,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 18:46:00,161 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 284729366, now seen corresponding path program 22 times [2021-06-12 18:46:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:00,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959136620] [2021-06-12 18:46:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:00,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:00,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959136620] [2021-06-12 18:46:00,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959136620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:00,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173264276] [2021-06-12 18:46:00,185 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:00,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 18:46:00,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:00,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:00,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173264276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:00,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:00,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:46:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802748600] [2021-06-12 18:46:00,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:46:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:46:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:46:00,240 INFO L87 Difference]: Start difference. First operand 237 states and 548 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:00,302 INFO L93 Difference]: Finished difference Result 329 states and 695 transitions. [2021-06-12 18:46:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 18:46:00,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:00,303 INFO L225 Difference]: With dead ends: 329 [2021-06-12 18:46:00,304 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 18:46:00,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 18:46:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 18:46:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 211. [2021-06-12 18:46:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3047619047619046) internal successors, (484), 210 states have internal predecessors, (484), 0 states have call successors, (0), 0 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 18:46:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 484 transitions. [2021-06-12 18:46:00,307 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 484 transitions. Word has length 20 [2021-06-12 18:46:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:00,308 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 484 transitions. [2021-06-12 18:46:00,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:00,308 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 484 transitions. [2021-06-12 18:46:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:00,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:00,308 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:00,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:00,525 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash -299472784, now seen corresponding path program 23 times [2021-06-12 18:46:00,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:00,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980289908] [2021-06-12 18:46:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:00,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:00,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980289908] [2021-06-12 18:46:00,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980289908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:00,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356307797] [2021-06-12 18:46:00,558 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:00,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 18:46:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:00,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356307797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:00,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:00,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 18:46:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025568552] [2021-06-12 18:46:00,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:46:00,615 INFO L87 Difference]: Start difference. First operand 211 states and 484 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:00,697 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2021-06-12 18:46:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:46:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:00,698 INFO L225 Difference]: With dead ends: 303 [2021-06-12 18:46:00,698 INFO L226 Difference]: Without dead ends: 303 [2021-06-12 18:46:00,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 18:46:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-12 18:46:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2021-06-12 18:46:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 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 18:46:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-12 18:46:00,705 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-12 18:46:00,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:00,705 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-12 18:46:00,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-12 18:46:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:00,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:00,705 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:00,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 18:46:00,917 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash 822584944, now seen corresponding path program 24 times [2021-06-12 18:46:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:00,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236268317] [2021-06-12 18:46:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:00,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236268317] [2021-06-12 18:46:00,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236268317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915703515] [2021-06-12 18:46:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:00,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 18:46:00,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:00,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915703515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:00,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:00,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 18:46:00,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195609771] [2021-06-12 18:46:00,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:00,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:46:00,989 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:01,058 INFO L93 Difference]: Finished difference Result 257 states and 522 transitions. [2021-06-12 18:46:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:01,059 INFO L225 Difference]: With dead ends: 257 [2021-06-12 18:46:01,059 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 18:46:01,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 18:46:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 18:46:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-06-12 18:46:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.228723404255319) internal successors, (419), 188 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 18:46:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 419 transitions. [2021-06-12 18:46:01,062 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 419 transitions. Word has length 20 [2021-06-12 18:46:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:01,062 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 419 transitions. [2021-06-12 18:46:01,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 419 transitions. [2021-06-12 18:46:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:01,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:01,063 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:01,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:01,277 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash 618096624, now seen corresponding path program 25 times [2021-06-12 18:46:01,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:01,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933830344] [2021-06-12 18:46:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:01,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933830344] [2021-06-12 18:46:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933830344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112662999] [2021-06-12 18:46:01,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:01,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112662999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:01,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:01,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 18:46:01,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506881464] [2021-06-12 18:46:01,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:46:01,350 INFO L87 Difference]: Start difference. First operand 189 states and 419 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:01,422 INFO L93 Difference]: Finished difference Result 233 states and 480 transitions. [2021-06-12 18:46:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:46:01,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:01,423 INFO L225 Difference]: With dead ends: 233 [2021-06-12 18:46:01,423 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 18:46:01,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 18:46:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 18:46:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2021-06-12 18:46:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2032085561497325) internal successors, (412), 187 states have internal predecessors, (412), 0 states have call successors, (0), 0 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 18:46:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 412 transitions. [2021-06-12 18:46:01,426 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 412 transitions. Word has length 20 [2021-06-12 18:46:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:01,426 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 412 transitions. [2021-06-12 18:46:01,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:46:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 412 transitions. [2021-06-12 18:46:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:01,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:01,437 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:01,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 18:46:01,653 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 469387998, now seen corresponding path program 26 times [2021-06-12 18:46:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:01,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037135235] [2021-06-12 18:46:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:01,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037135235] [2021-06-12 18:46:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037135235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329176] [2021-06-12 18:46:01,673 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:01,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 18:46:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:01,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:01,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:01,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:46:01,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717758736] [2021-06-12 18:46:01,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:46:01,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:46:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:46:01,729 INFO L87 Difference]: Start difference. First operand 188 states and 412 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:01,785 INFO L93 Difference]: Finished difference Result 289 states and 591 transitions. [2021-06-12 18:46:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:01,786 INFO L225 Difference]: With dead ends: 289 [2021-06-12 18:46:01,786 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 18:46:01,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:46:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 18:46:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-06-12 18:46:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.24) internal successors, (448), 200 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 18:46:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 448 transitions. [2021-06-12 18:46:01,790 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 448 transitions. Word has length 20 [2021-06-12 18:46:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:01,790 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 448 transitions. [2021-06-12 18:46:01,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 448 transitions. [2021-06-12 18:46:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:01,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:01,791 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:02,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:02,005 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2141528628, now seen corresponding path program 27 times [2021-06-12 18:46:02,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:02,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000771085] [2021-06-12 18:46:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:02,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:02,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000771085] [2021-06-12 18:46:02,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000771085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:02,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657165818] [2021-06-12 18:46:02,027 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:02,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 18:46:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:02,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657165818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:02,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:02,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:46:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910176504] [2021-06-12 18:46:02,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:46:02,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:46:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:46:02,116 INFO L87 Difference]: Start difference. First operand 201 states and 448 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:02,181 INFO L93 Difference]: Finished difference Result 308 states and 651 transitions. [2021-06-12 18:46:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:02,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:02,182 INFO L225 Difference]: With dead ends: 308 [2021-06-12 18:46:02,182 INFO L226 Difference]: Without dead ends: 308 [2021-06-12 18:46:02,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:46:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-12 18:46:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 218. [2021-06-12 18:46:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2764976958525347) internal successors, (494), 217 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 18:46:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 494 transitions. [2021-06-12 18:46:02,199 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 494 transitions. Word has length 20 [2021-06-12 18:46:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:02,199 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 494 transitions. [2021-06-12 18:46:02,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 494 transitions. [2021-06-12 18:46:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:02,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:02,199 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:02,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 18:46:02,413 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:02,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:02,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1652645398, now seen corresponding path program 28 times [2021-06-12 18:46:02,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:02,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297317386] [2021-06-12 18:46:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:02,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:02,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297317386] [2021-06-12 18:46:02,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297317386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:02,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439145244] [2021-06-12 18:46:02,433 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 18:46:02,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 18:46:02,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:02,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439145244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:02,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:02,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 18:46:02,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569777496] [2021-06-12 18:46:02,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 18:46:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 18:46:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 18:46:02,482 INFO L87 Difference]: Start difference. First operand 218 states and 494 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:02,533 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2021-06-12 18:46:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 18:46:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:02,535 INFO L225 Difference]: With dead ends: 302 [2021-06-12 18:46:02,535 INFO L226 Difference]: Without dead ends: 299 [2021-06-12 18:46:02,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 18:46:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-12 18:46:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 218. [2021-06-12 18:46:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 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 18:46:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-06-12 18:46:02,538 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 20 [2021-06-12 18:46:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:02,539 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-06-12 18:46:02,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-06-12 18:46:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:02,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:02,539 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:02,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:02,753 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443248, now seen corresponding path program 29 times [2021-06-12 18:46:02,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:02,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580036386] [2021-06-12 18:46:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:02,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:02,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580036386] [2021-06-12 18:46:02,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580036386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068337482] [2021-06-12 18:46:02,775 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:02,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 18:46:02,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:02,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068337482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:02,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:02,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 18:46:02,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5130993] [2021-06-12 18:46:02,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:02,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:46:02,846 INFO L87 Difference]: Start difference. First operand 218 states and 493 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:02,926 INFO L93 Difference]: Finished difference Result 318 states and 670 transitions. [2021-06-12 18:46:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:46:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:02,928 INFO L225 Difference]: With dead ends: 318 [2021-06-12 18:46:02,928 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 18:46:02,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-12 18:46:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 18:46:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-12 18:46:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.266968325791855) internal successors, (501), 221 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 18:46:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 501 transitions. [2021-06-12 18:46:02,932 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 501 transitions. Word has length 20 [2021-06-12 18:46:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:02,932 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 501 transitions. [2021-06-12 18:46:02,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 501 transitions. [2021-06-12 18:46:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:02,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:02,932 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:03,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 18:46:03,149 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2104466320, now seen corresponding path program 30 times [2021-06-12 18:46:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:03,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150512269] [2021-06-12 18:46:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:03,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:03,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150512269] [2021-06-12 18:46:03,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150512269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:03,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733609738] [2021-06-12 18:46:03,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:03,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 18:46:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:03,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733609738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:03,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:03,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 18:46:03,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261452949] [2021-06-12 18:46:03,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:03,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 18:46:03,231 INFO L87 Difference]: Start difference. First operand 222 states and 501 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:03,317 INFO L93 Difference]: Finished difference Result 327 states and 677 transitions. [2021-06-12 18:46:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:03,318 INFO L225 Difference]: With dead ends: 327 [2021-06-12 18:46:03,318 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 18:46:03,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 18:46:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 18:46:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-12 18:46:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.257918552036199) internal successors, (499), 221 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 18:46:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 499 transitions. [2021-06-12 18:46:03,322 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 499 transitions. Word has length 20 [2021-06-12 18:46:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:03,322 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 499 transitions. [2021-06-12 18:46:03,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 499 transitions. [2021-06-12 18:46:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:03,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:03,323 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:03,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:03,533 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1481240012, now seen corresponding path program 31 times [2021-06-12 18:46:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870131949] [2021-06-12 18:46:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:03,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870131949] [2021-06-12 18:46:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870131949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624886925] [2021-06-12 18:46:03,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:03,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:03,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:03,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624886925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:03,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:03,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 18:46:03,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851955619] [2021-06-12 18:46:03,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 18:46:03,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 18:46:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:46:03,614 INFO L87 Difference]: Start difference. First operand 222 states and 499 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:03,715 INFO L93 Difference]: Finished difference Result 300 states and 625 transitions. [2021-06-12 18:46:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:46:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:03,717 INFO L225 Difference]: With dead ends: 300 [2021-06-12 18:46:03,717 INFO L226 Difference]: Without dead ends: 297 [2021-06-12 18:46:03,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 18:46:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-12 18:46:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 206. [2021-06-12 18:46:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2536585365853656) internal successors, (462), 205 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 18:46:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 462 transitions. [2021-06-12 18:46:03,720 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 462 transitions. Word has length 20 [2021-06-12 18:46:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:03,720 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 462 transitions. [2021-06-12 18:46:03,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 462 transitions. [2021-06-12 18:46:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 18:46:03,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:03,721 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:03,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 18:46:03,937 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash -33586060, now seen corresponding path program 32 times [2021-06-12 18:46:03,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:03,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947945082] [2021-06-12 18:46:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:03,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:03,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947945082] [2021-06-12 18:46:03,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947945082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:03,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654053503] [2021-06-12 18:46:03,961 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:03,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 18:46:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:04,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654053503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:04,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:04,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 18:46:04,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689446527] [2021-06-12 18:46:04,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 18:46:04,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:04,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 18:46:04,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 18:46:04,007 INFO L87 Difference]: Start difference. First operand 206 states and 462 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:04,089 INFO L93 Difference]: Finished difference Result 296 states and 607 transitions. [2021-06-12 18:46:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 18:46:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 18:46:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:04,090 INFO L225 Difference]: With dead ends: 296 [2021-06-12 18:46:04,090 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 18:46:04,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 18:46:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 18:46:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-06-12 18:46:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.241706161137441) internal successors, (473), 211 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 18:46:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 473 transitions. [2021-06-12 18:46:04,093 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 473 transitions. Word has length 20 [2021-06-12 18:46:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:04,093 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 473 transitions. [2021-06-12 18:46:04,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 473 transitions. [2021-06-12 18:46:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 18:46:04,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:04,094 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:04,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 18:46:04,309 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1571256086, now seen corresponding path program 33 times [2021-06-12 18:46:04,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:04,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962889084] [2021-06-12 18:46:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:04,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962889084] [2021-06-12 18:46:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962889084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344198747] [2021-06-12 18:46:04,339 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:04,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 18:46:04,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 18:46:04,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344198747] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:46:04,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 18:46:04,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-12 18:46:04,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570618935] [2021-06-12 18:46:04,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:46:04,423 INFO L87 Difference]: Start difference. First operand 212 states and 473 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:04,477 INFO L93 Difference]: Finished difference Result 239 states and 520 transitions. [2021-06-12 18:46:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:04,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 18:46:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:04,478 INFO L225 Difference]: With dead ends: 239 [2021-06-12 18:46:04,478 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 18:46:04,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 18:46:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 18:46:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2021-06-12 18:46:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1923076923076925) internal successors, (456), 208 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:46:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 456 transitions. [2021-06-12 18:46:04,491 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 456 transitions. Word has length 22 [2021-06-12 18:46:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:04,492 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 456 transitions. [2021-06-12 18:46:04,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 456 transitions. [2021-06-12 18:46:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 18:46:04,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:04,492 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:04,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 18:46:04,708 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:04,708 INFO L82 PathProgramCache]: Analyzing trace with hash 792994068, now seen corresponding path program 34 times [2021-06-12 18:46:04,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:04,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255090926] [2021-06-12 18:46:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:04,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255090926] [2021-06-12 18:46:04,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255090926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118858721] [2021-06-12 18:46:04,735 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:04,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 18:46:04,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 18:46:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 18:46:04,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118858721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:04,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:04,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 18:46:04,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533922085] [2021-06-12 18:46:04,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:46:04,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:46:04,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:46:04,781 INFO L87 Difference]: Start difference. First operand 209 states and 456 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:46:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:04,830 INFO L93 Difference]: Finished difference Result 322 states and 668 transitions. [2021-06-12 18:46:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 18:46:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-06-12 18:46:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:04,832 INFO L225 Difference]: With dead ends: 322 [2021-06-12 18:46:04,832 INFO L226 Difference]: Without dead ends: 310 [2021-06-12 18:46:04,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:46:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-12 18:46:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2021-06-12 18:46:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2181069958847734) internal successors, (539), 243 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 18:46:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 539 transitions. [2021-06-12 18:46:04,835 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 539 transitions. Word has length 22 [2021-06-12 18:46:04,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:04,835 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 539 transitions. [2021-06-12 18:46:04,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:46:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 539 transitions. [2021-06-12 18:46:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 18:46:04,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:04,836 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 18:46:05,053 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1965218720, now seen corresponding path program 35 times [2021-06-12 18:46:05,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:05,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896231821] [2021-06-12 18:46:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:46:05,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:05,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896231821] [2021-06-12 18:46:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896231821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:05,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638638389] [2021-06-12 18:46:05,081 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:05,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 18:46:05,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 18:46:05,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:46:05,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638638389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:05,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:05,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 18:46:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422068735] [2021-06-12 18:46:05,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:46:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:46:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:46:05,150 INFO L87 Difference]: Start difference. First operand 244 states and 539 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:46:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:05,199 INFO L93 Difference]: Finished difference Result 375 states and 800 transitions. [2021-06-12 18:46:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 18:46:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-06-12 18:46:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:05,201 INFO L225 Difference]: With dead ends: 375 [2021-06-12 18:46:05,201 INFO L226 Difference]: Without dead ends: 363 [2021-06-12 18:46:05,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:46:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-12 18:46:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 294. [2021-06-12 18:46:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.266211604095563) internal successors, (664), 293 states have internal predecessors, (664), 0 states have call successors, (0), 0 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 18:46:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 664 transitions. [2021-06-12 18:46:05,205 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 664 transitions. Word has length 22 [2021-06-12 18:46:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:05,205 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 664 transitions. [2021-06-12 18:46:05,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:46:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 664 transitions. [2021-06-12 18:46:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 18:46:05,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:05,206 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:05,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 18:46:05,421 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash 116908384, now seen corresponding path program 36 times [2021-06-12 18:46:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:05,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404762616] [2021-06-12 18:46:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:46:05,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:05,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404762616] [2021-06-12 18:46:05,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404762616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:05,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262080245] [2021-06-12 18:46:05,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:05,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 18:46:05,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 18:46:05,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262080245] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:46:05,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 18:46:05,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-12 18:46:05,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788811109] [2021-06-12 18:46:05,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:05,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:05,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 18:46:05,552 INFO L87 Difference]: Start difference. First operand 294 states and 664 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 18:46:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:05,625 INFO L93 Difference]: Finished difference Result 320 states and 710 transitions. [2021-06-12 18:46:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 22 [2021-06-12 18:46:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:05,627 INFO L225 Difference]: With dead ends: 320 [2021-06-12 18:46:05,627 INFO L226 Difference]: Without dead ends: 308 [2021-06-12 18:46:05,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 18:46:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-12 18:46:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 291. [2021-06-12 18:46:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.193103448275862) internal successors, (636), 290 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 18:46:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 636 transitions. [2021-06-12 18:46:05,631 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 636 transitions. Word has length 22 [2021-06-12 18:46:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:05,631 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 636 transitions. [2021-06-12 18:46:05,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 18:46:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 636 transitions. [2021-06-12 18:46:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 18:46:05,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:05,631 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:05,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 18:46:05,849 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash -694299372, now seen corresponding path program 37 times [2021-06-12 18:46:05,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:05,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674285648] [2021-06-12 18:46:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:46:05,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674285648] [2021-06-12 18:46:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674285648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496949239] [2021-06-12 18:46:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 18:46:05,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:46:05,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496949239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:05,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:05,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 18:46:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277289169] [2021-06-12 18:46:05,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 18:46:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 18:46:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:46:05,972 INFO L87 Difference]: Start difference. First operand 291 states and 636 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:46:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:06,033 INFO L93 Difference]: Finished difference Result 425 states and 900 transitions. [2021-06-12 18:46:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 18:46:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-06-12 18:46:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:06,035 INFO L225 Difference]: With dead ends: 425 [2021-06-12 18:46:06,035 INFO L226 Difference]: Without dead ends: 416 [2021-06-12 18:46:06,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 18:46:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-12 18:46:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-12 18:46:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.226361031518625) internal successors, (777), 349 states have internal predecessors, (777), 0 states have call successors, (0), 0 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 18:46:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 777 transitions. [2021-06-12 18:46:06,040 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 777 transitions. Word has length 22 [2021-06-12 18:46:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:06,040 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 777 transitions. [2021-06-12 18:46:06,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:46:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 777 transitions. [2021-06-12 18:46:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 18:46:06,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:06,040 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:06,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 18:46:06,257 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1224912364, now seen corresponding path program 38 times [2021-06-12 18:46:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:06,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177038338] [2021-06-12 18:46:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 18:46:06,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:06,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177038338] [2021-06-12 18:46:06,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177038338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:06,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408698784] [2021-06-12 18:46:06,289 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:06,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 18:46:06,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 18:46:06,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:06,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408698784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:06,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 18:46:06,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2021-06-12 18:46:06,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322517714] [2021-06-12 18:46:06,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 18:46:06,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:06,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 18:46:06,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 18:46:06,409 INFO L87 Difference]: Start difference. First operand 350 states and 777 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 18:46:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:06,590 INFO L93 Difference]: Finished difference Result 623 states and 1302 transitions. [2021-06-12 18:46:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 18:46:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 22 [2021-06-12 18:46:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:06,592 INFO L225 Difference]: With dead ends: 623 [2021-06-12 18:46:06,592 INFO L226 Difference]: Without dead ends: 605 [2021-06-12 18:46:06,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 18:46:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-12 18:46:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 410. [2021-06-12 18:46:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.2665036674816625) internal successors, (927), 409 states have internal predecessors, (927), 0 states have call successors, (0), 0 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 18:46:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 927 transitions. [2021-06-12 18:46:06,598 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 927 transitions. Word has length 22 [2021-06-12 18:46:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:06,598 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 927 transitions. [2021-06-12 18:46:06,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 18:46:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 927 transitions. [2021-06-12 18:46:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 18:46:06,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 18:46:06,599 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 18:46:06,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:06,799 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 18:46:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 18:46:06,799 INFO L82 PathProgramCache]: Analyzing trace with hash -972138362, now seen corresponding path program 39 times [2021-06-12 18:46:06,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 18:46:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329827458] [2021-06-12 18:46:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 18:46:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 18:46:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 18:46:06,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 18:46:06,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329827458] [2021-06-12 18:46:06,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329827458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 18:46:06,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27182343] [2021-06-12 18:46:06,839 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:06,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 18:46:06,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 18:46:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 18:46:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 18:46:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-12 18:46:06,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27182343] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 18:46:06,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 18:46:06,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-06-12 18:46:06,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581290618] [2021-06-12 18:46:06,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 18:46:06,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 18:46:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 18:46:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 18:46:06,949 INFO L87 Difference]: Start difference. First operand 410 states and 927 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 18:46:07,028 INFO L93 Difference]: Finished difference Result 428 states and 965 transitions. [2021-06-12 18:46:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 18:46:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 18:46:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 18:46:07,028 INFO L225 Difference]: With dead ends: 428 [2021-06-12 18:46:07,028 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 18:46:07,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 18:46:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 18:46:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 18:46:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 18:46:07,029 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-12 18:46:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 18:46:07,029 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 18:46:07,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 18:46:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 18:46:07,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 18:46:07,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 18:46:07,234 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 18:46:07,236 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 06:46:07 BasicIcfg [2021-06-12 18:46:07,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 18:46:07,236 INFO L168 Benchmark]: Toolchain (without parser) took 16143.53 ms. Allocated memory was 198.2 MB in the beginning and 243.3 MB in the end (delta: 45.1 MB). Free memory was 178.8 MB in the beginning and 189.3 MB in the end (delta: -10.5 MB). Peak memory consumption was 35.0 MB. Max. memory is 8.0 GB. [2021-06-12 18:46:07,236 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 198.2 MB. Free memory is still 179.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 18:46:07,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.55 ms. Allocated memory is still 198.2 MB. Free memory was 178.6 MB in the beginning and 177.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 18:46:07,237 INFO L168 Benchmark]: Boogie Preprocessor took 10.12 ms. Allocated memory is still 198.2 MB. Free memory was 177.2 MB in the beginning and 176.3 MB in the end (delta: 916.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 18:46:07,237 INFO L168 Benchmark]: RCFGBuilder took 190.36 ms. Allocated memory is still 198.2 MB. Free memory was 176.2 MB in the beginning and 166.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-12 18:46:07,237 INFO L168 Benchmark]: TraceAbstraction took 15919.27 ms. Allocated memory was 198.2 MB in the beginning and 243.3 MB in the end (delta: 45.1 MB). Free memory was 166.3 MB in the beginning and 189.3 MB in the end (delta: -23.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 8.0 GB. [2021-06-12 18:46:07,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 198.2 MB. Free memory is still 179.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.55 ms. Allocated memory is still 198.2 MB. Free memory was 178.6 MB in the beginning and 177.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.12 ms. Allocated memory is still 198.2 MB. Free memory was 177.2 MB in the beginning and 176.3 MB in the end (delta: 916.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 190.36 ms. Allocated memory is still 198.2 MB. Free memory was 176.2 MB in the beginning and 166.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15919.27 ms. Allocated memory was 198.2 MB in the beginning and 243.3 MB in the end (delta: 45.1 MB). Free memory was 166.3 MB in the beginning and 189.3 MB in the end (delta: -23.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15820.4ms, OverallIterations: 43, TraceHistogramMax: 4, EmptinessCheckTime: 38.3ms, AutomataDifference: 3054.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 851 SDtfs, 2271 SDslu, 2535 SDs, 0 SdLazy, 3354 SolverSat, 500 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1462.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1102 GetRequests, 676 SyntacticMatches, 60 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1885.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=410occurred in iteration=42, InterpolantAutomatonStates: 408, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 249.4ms AutomataMinimizationTime, 43 MinimizatonAttempts, 2839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.2ms SsaConstructionTime, 267.5ms SatisfiabilityAnalysisTime, 2883.4ms InterpolantComputationTime, 1520 NumberOfCodeBlocks, 1510 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1438 ConstructedInterpolants, 0 QuantifiedInterpolants, 5559 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1167 ConjunctsInSsa, 290 ConjunctsInUnsatCore, 82 InterpolantComputations, 7 PerfectInterpolantSequences, 371/866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...