/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 12:57:11,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 12:57:11,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 12:57:11,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 12:57:11,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 12:57:11,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 12:57:11,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 12:57:11,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 12:57:11,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 12:57:11,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 12:57:11,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 12:57:11,859 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 12:57:11,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 12:57:11,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 12:57:11,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 12:57:11,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 12:57:11,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 12:57:11,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 12:57:11,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 12:57:11,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 12:57:11,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 12:57:11,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 12:57:11,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 12:57:11,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 12:57:11,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 12:57:11,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 12:57:11,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 12:57:11,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 12:57:11,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 12:57:11,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 12:57:11,863 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 12:57:11,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 12:57:12,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 12:57:12,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 12:57:12,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 12:57:12,195 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 12:57:12,198 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 12:57:12,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2021-06-05 12:57:12,199 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2021-06-05 12:57:12,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 12:57:12,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 12:57:12,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 12:57:12,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 12:57:12,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 12:57:12,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 12:57:12,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 12:57:12,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 12:57:12,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 12:57:12,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... [2021-06-05 12:57:12,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 12:57:12,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 12:57:12,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 12:57:12,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 12:57:12,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 12:57:12,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 12:57:12,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 12:57:12,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 12:57:12,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2021-06-05 12:57:12,344 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2021-06-05 12:57:12,344 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2021-06-05 12:57:12,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2021-06-05 12:57:12,345 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2021-06-05 12:57:12,345 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2021-06-05 12:57:12,346 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 12:57:12,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 12:57:12,500 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 12:57:12,502 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:57:12 BoogieIcfgContainer [2021-06-05 12:57:12,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 12:57:12,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 12:57:12,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 12:57:12,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 12:57:12,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:12" (1/2) ... [2021-06-05 12:57:12,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bc0fb0 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 12:57:12, skipping insertion in model container [2021-06-05 12:57:12,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:57:12" (2/2) ... [2021-06-05 12:57:12,512 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2021-06-05 12:57:12,521 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 12:57:12,522 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 12:57:12,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 12:57:12,523 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 12:57:12,594 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 12:57:12,612 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 12:57:12,633 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:12,633 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:12,633 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:12,633 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:12,633 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:12,633 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:12,633 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:12,633 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:57:12,647 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2021-06-05 12:57:12,660 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) [2021-06-05 12:57:12,662 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) [2021-06-05 12:57:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 12:57:12,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:12,667 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:12,668 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1474916704, now seen corresponding path program 1 times [2021-06-05 12:57:12,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:12,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5833710] [2021-06-05 12:57:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:12,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:12,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5833710] [2021-06-05 12:57:12,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5833710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:12,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:12,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 12:57:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95357233] [2021-06-05 12:57:12,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:57:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:57:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:12,834 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) [2021-06-05 12:57:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:12,923 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-05 12:57:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:57:12,925 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 [2021-06-05 12:57:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:12,932 INFO L225 Difference]: With dead ends: 63 [2021-06-05 12:57:12,932 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 12:57:12,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 12:57:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-06-05 12:57:12,990 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) [2021-06-05 12:57:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 12:57:12,997 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2021-06-05 12:57:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:12,998 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 12:57:12,999 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) [2021-06-05 12:57:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 12:57:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 12:57:13,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:13,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:13,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 12:57:13,001 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2103181474, now seen corresponding path program 1 times [2021-06-05 12:57:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:13,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921065388] [2021-06-05 12:57:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:13,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:13,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921065388] [2021-06-05 12:57:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921065388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525064102] [2021-06-05 12:57:13,087 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 [2021-06-05 12:57:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 12:57:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:13,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525064102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:13,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:13,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 12:57:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192946827] [2021-06-05 12:57:13,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:13,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:13,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:13,208 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) [2021-06-05 12:57:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:13,289 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-06-05 12:57:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:13,289 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 [2021-06-05 12:57:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:13,290 INFO L225 Difference]: With dead ends: 78 [2021-06-05 12:57:13,291 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 12:57:13,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 12:57:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-06-05 12:57:13,297 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) [2021-06-05 12:57:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 12:57:13,298 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-05 12:57:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:13,299 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 12:57:13,299 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) [2021-06-05 12:57:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 12:57:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 12:57:13,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:13,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:13,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 12:57:13,501 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash -85551518, now seen corresponding path program 1 times [2021-06-05 12:57:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:13,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886474960] [2021-06-05 12:57:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:13,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:13,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886474960] [2021-06-05 12:57:13,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886474960] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:13,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:13,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:57:13,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271804342] [2021-06-05 12:57:13,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:13,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:13,537 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) [2021-06-05 12:57:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:13,555 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2021-06-05 12:57:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:13,555 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 [2021-06-05 12:57:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:13,556 INFO L225 Difference]: With dead ends: 51 [2021-06-05 12:57:13,556 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 12:57:13,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 12:57:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-06-05 12:57:13,560 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) [2021-06-05 12:57:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-05 12:57:13,561 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-06-05 12:57:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:13,562 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-05 12:57:13,562 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) [2021-06-05 12:57:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-05 12:57:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 12:57:13,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:13,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:13,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 12:57:13,563 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1933209310, now seen corresponding path program 2 times [2021-06-05 12:57:13,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:13,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218961410] [2021-06-05 12:57:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:13,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:13,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218961410] [2021-06-05 12:57:13,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218961410] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:13,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:13,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 12:57:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66412216] [2021-06-05 12:57:13,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:13,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:13,621 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) [2021-06-05 12:57:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:13,662 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-06-05 12:57:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:13,663 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 [2021-06-05 12:57:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:13,666 INFO L225 Difference]: With dead ends: 48 [2021-06-05 12:57:13,666 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 12:57:13,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 12:57:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-06-05 12:57:13,670 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) [2021-06-05 12:57:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2021-06-05 12:57:13,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2021-06-05 12:57:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:13,671 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2021-06-05 12:57:13,671 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) [2021-06-05 12:57:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2021-06-05 12:57:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 12:57:13,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:13,672 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:13,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 12:57:13,673 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1742393248, now seen corresponding path program 1 times [2021-06-05 12:57:13,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:13,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060508652] [2021-06-05 12:57:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:13,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:13,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060508652] [2021-06-05 12:57:13,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060508652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:13,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682406414] [2021-06-05 12:57:13,714 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 [2021-06-05 12:57:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:13,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:13,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:13,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682406414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:13,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:13,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-06-05 12:57:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110516961] [2021-06-05 12:57:13,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:13,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:13,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:13,814 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) [2021-06-05 12:57:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:13,862 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-05 12:57:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:13,862 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 [2021-06-05 12:57:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:13,864 INFO L225 Difference]: With dead ends: 107 [2021-06-05 12:57:13,864 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 12:57:13,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 12:57:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-06-05 12:57:13,881 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) [2021-06-05 12:57:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2021-06-05 12:57:13,882 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2021-06-05 12:57:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:13,883 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2021-06-05 12:57:13,883 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) [2021-06-05 12:57:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2021-06-05 12:57:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 12:57:13,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:13,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:14,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:14,097 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1371911392, now seen corresponding path program 2 times [2021-06-05 12:57:14,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:14,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422108944] [2021-06-05 12:57:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:14,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422108944] [2021-06-05 12:57:14,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422108944] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:14,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:14,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 12:57:14,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046198839] [2021-06-05 12:57:14,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:14,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:14,170 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) [2021-06-05 12:57:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:14,214 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2021-06-05 12:57:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:14,214 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 [2021-06-05 12:57:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:14,215 INFO L225 Difference]: With dead ends: 127 [2021-06-05 12:57:14,215 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 12:57:14,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 12:57:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-06-05 12:57:14,220 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) [2021-06-05 12:57:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-06-05 12:57:14,222 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2021-06-05 12:57:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:14,223 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-06-05 12:57:14,223 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) [2021-06-05 12:57:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-06-05 12:57:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:14,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:14,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:14,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 12:57:14,224 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1755689310, now seen corresponding path program 3 times [2021-06-05 12:57:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989365121] [2021-06-05 12:57:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:14,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989365121] [2021-06-05 12:57:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989365121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382445523] [2021-06-05 12:57:14,257 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 [2021-06-05 12:57:14,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 12:57:14,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:14,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382445523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:14,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:14,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 12:57:14,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064637945] [2021-06-05 12:57:14,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:14,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:14,365 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) [2021-06-05 12:57:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:14,499 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2021-06-05 12:57:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 12:57:14,500 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 [2021-06-05 12:57:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:14,501 INFO L225 Difference]: With dead ends: 176 [2021-06-05 12:57:14,501 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 12:57:14,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 12:57:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2021-06-05 12:57:14,508 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) [2021-06-05 12:57:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-06-05 12:57:14,508 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2021-06-05 12:57:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:14,509 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-06-05 12:57:14,509 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) [2021-06-05 12:57:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-06-05 12:57:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:14,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:14,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:14,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:14,730 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash -627140766, now seen corresponding path program 4 times [2021-06-05 12:57:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:14,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415743709] [2021-06-05 12:57:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:14,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:14,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415743709] [2021-06-05 12:57:14,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415743709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:14,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837416542] [2021-06-05 12:57:14,766 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 [2021-06-05 12:57:14,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 12:57:14,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:14,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837416542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:14,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:14,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 12:57:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117342992] [2021-06-05 12:57:14,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:14,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:14,858 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) [2021-06-05 12:57:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:14,941 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2021-06-05 12:57:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 12:57:14,942 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 [2021-06-05 12:57:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:14,943 INFO L225 Difference]: With dead ends: 161 [2021-06-05 12:57:14,943 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 12:57:14,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 12:57:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 12:57:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2021-06-05 12:57:14,948 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) [2021-06-05 12:57:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2021-06-05 12:57:14,949 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2021-06-05 12:57:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:14,949 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2021-06-05 12:57:14,949 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) [2021-06-05 12:57:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2021-06-05 12:57:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:14,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:14,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:15,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:15,169 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2026275120, now seen corresponding path program 5 times [2021-06-05 12:57:15,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:15,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614229219] [2021-06-05 12:57:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:15,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614229219] [2021-06-05 12:57:15,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614229219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296384880] [2021-06-05 12:57:15,198 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 [2021-06-05 12:57:15,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 12:57:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:15,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296384880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:15,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:15,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 12:57:15,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408271196] [2021-06-05 12:57:15,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:15,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:15,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:15,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:15,294 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) [2021-06-05 12:57:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:15,366 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2021-06-05 12:57:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 12:57:15,368 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 [2021-06-05 12:57:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:15,369 INFO L225 Difference]: With dead ends: 154 [2021-06-05 12:57:15,369 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 12:57:15,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 12:57:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2021-06-05 12:57:15,381 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) [2021-06-05 12:57:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2021-06-05 12:57:15,382 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2021-06-05 12:57:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:15,382 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2021-06-05 12:57:15,383 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) [2021-06-05 12:57:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2021-06-05 12:57:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:15,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:15,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:15,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:15,597 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1537391890, now seen corresponding path program 6 times [2021-06-05 12:57:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:15,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756993346] [2021-06-05 12:57:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:15,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:15,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756993346] [2021-06-05 12:57:15,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756993346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:15,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531157718] [2021-06-05 12:57:15,636 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 [2021-06-05 12:57:15,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 12:57:15,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:15,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:15,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531157718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:15,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:15,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 12:57:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269814975] [2021-06-05 12:57:15,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:15,718 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) [2021-06-05 12:57:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:15,779 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2021-06-05 12:57:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 12:57:15,779 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 [2021-06-05 12:57:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:15,780 INFO L225 Difference]: With dead ends: 144 [2021-06-05 12:57:15,781 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 12:57:15,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 12:57:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-05 12:57:15,787 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) [2021-06-05 12:57:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-05 12:57:15,788 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2021-06-05 12:57:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:15,788 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-05 12:57:15,788 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) [2021-06-05 12:57:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-05 12:57:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:15,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:15,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:16,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:16,005 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2099418526, now seen corresponding path program 7 times [2021-06-05 12:57:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:16,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308148180] [2021-06-05 12:57:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:16,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:16,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308148180] [2021-06-05 12:57:16,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308148180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:16,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081229831] [2021-06-05 12:57:16,054 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 [2021-06-05 12:57:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:16,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081229831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:16,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:16,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 12:57:16,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913306285] [2021-06-05 12:57:16,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:16,122 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) [2021-06-05 12:57:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:16,202 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2021-06-05 12:57:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 12:57:16,203 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 [2021-06-05 12:57:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:16,204 INFO L225 Difference]: With dead ends: 195 [2021-06-05 12:57:16,204 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 12:57:16,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 12:57:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2021-06-05 12:57:16,208 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) [2021-06-05 12:57:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2021-06-05 12:57:16,209 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2021-06-05 12:57:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:16,210 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2021-06-05 12:57:16,210 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) [2021-06-05 12:57:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2021-06-05 12:57:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:16,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:16,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:16,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:16,433 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash -177918814, now seen corresponding path program 8 times [2021-06-05 12:57:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:16,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044368186] [2021-06-05 12:57:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:16,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:16,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044368186] [2021-06-05 12:57:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044368186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:16,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824117739] [2021-06-05 12:57:16,495 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:16,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 12:57:16,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:16,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824117739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:16,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:16,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 12:57:16,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685606657] [2021-06-05 12:57:16,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:16,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:16,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:16,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:16,578 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) [2021-06-05 12:57:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:16,638 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2021-06-05 12:57:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 12:57:16,638 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 [2021-06-05 12:57:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:16,640 INFO L225 Difference]: With dead ends: 177 [2021-06-05 12:57:16,640 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 12:57:16,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 12:57:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-06-05 12:57:16,644 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) [2021-06-05 12:57:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2021-06-05 12:57:16,645 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2021-06-05 12:57:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:16,645 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2021-06-05 12:57:16,645 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) [2021-06-05 12:57:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2021-06-05 12:57:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:16,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:16,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:16,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 12:57:16,869 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -523408140, now seen corresponding path program 9 times [2021-06-05 12:57:16,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:16,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100630870] [2021-06-05 12:57:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:16,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:16,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100630870] [2021-06-05 12:57:16,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100630870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:16,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045181697] [2021-06-05 12:57:16,898 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 [2021-06-05 12:57:16,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 12:57:16,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:16,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045181697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:16,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:16,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 12:57:16,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902529911] [2021-06-05 12:57:16,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:16,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:16,967 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) [2021-06-05 12:57:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:17,028 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2021-06-05 12:57:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 12:57:17,028 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 [2021-06-05 12:57:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:17,029 INFO L225 Difference]: With dead ends: 184 [2021-06-05 12:57:17,029 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 12:57:17,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 12:57:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2021-06-05 12:57:17,034 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) [2021-06-05 12:57:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-06-05 12:57:17,034 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2021-06-05 12:57:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:17,035 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-06-05 12:57:17,035 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) [2021-06-05 12:57:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-06-05 12:57:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:17,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:17,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:17,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:17,257 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1012291370, now seen corresponding path program 10 times [2021-06-05 12:57:17,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:17,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132358655] [2021-06-05 12:57:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:17,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:17,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132358655] [2021-06-05 12:57:17,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132358655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:17,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209087597] [2021-06-05 12:57:17,287 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 [2021-06-05 12:57:17,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 12:57:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209087597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:17,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:17,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 12:57:17,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692104846] [2021-06-05 12:57:17,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:17,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:17,342 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) [2021-06-05 12:57:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:17,396 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2021-06-05 12:57:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 12:57:17,396 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 [2021-06-05 12:57:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:17,398 INFO L225 Difference]: With dead ends: 192 [2021-06-05 12:57:17,398 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 12:57:17,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 12:57:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2021-06-05 12:57:17,402 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) [2021-06-05 12:57:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2021-06-05 12:57:17,403 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2021-06-05 12:57:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:17,403 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2021-06-05 12:57:17,403 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) [2021-06-05 12:57:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2021-06-05 12:57:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:17,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:17,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:17,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:17,618 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1596493520, now seen corresponding path program 11 times [2021-06-05 12:57:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:17,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687875482] [2021-06-05 12:57:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:17,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687875482] [2021-06-05 12:57:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687875482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635929655] [2021-06-05 12:57:17,646 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 [2021-06-05 12:57:17,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 12:57:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:17,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:17,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:17,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635929655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:17,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:17,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 12:57:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149554745] [2021-06-05 12:57:17,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:17,717 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) [2021-06-05 12:57:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:17,809 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2021-06-05 12:57:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 12:57:17,811 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 [2021-06-05 12:57:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:17,812 INFO L225 Difference]: With dead ends: 173 [2021-06-05 12:57:17,812 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 12:57:17,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 12:57:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-06-05 12:57:17,821 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) [2021-06-05 12:57:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2021-06-05 12:57:17,822 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2021-06-05 12:57:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:17,822 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2021-06-05 12:57:17,822 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) [2021-06-05 12:57:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2021-06-05 12:57:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:17,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:17,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:18,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 12:57:18,037 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash -474435792, now seen corresponding path program 12 times [2021-06-05 12:57:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693923648] [2021-06-05 12:57:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:18,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:18,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693923648] [2021-06-05 12:57:18,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693923648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:18,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297607147] [2021-06-05 12:57:18,061 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 [2021-06-05 12:57:18,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 12:57:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297607147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:18,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:18,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 12:57:18,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89711082] [2021-06-05 12:57:18,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:18,135 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) [2021-06-05 12:57:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:18,223 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-06-05 12:57:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 12:57:18,223 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 [2021-06-05 12:57:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:18,224 INFO L225 Difference]: With dead ends: 188 [2021-06-05 12:57:18,224 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 12:57:18,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 12:57:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 12:57:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-06-05 12:57:18,228 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) [2021-06-05 12:57:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-06-05 12:57:18,229 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2021-06-05 12:57:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:18,229 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-06-05 12:57:18,229 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) [2021-06-05 12:57:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-06-05 12:57:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 12:57:18,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:18,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:18,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 12:57:18,442 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -734527072, now seen corresponding path program 13 times [2021-06-05 12:57:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:18,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903791445] [2021-06-05 12:57:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:18,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:18,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903791445] [2021-06-05 12:57:18,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903791445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:18,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328370567] [2021-06-05 12:57:18,510 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 [2021-06-05 12:57:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 12:57:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:18,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328370567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:18,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:18,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 12:57:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129775418] [2021-06-05 12:57:18,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:18,596 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) [2021-06-05 12:57:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:18,642 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2021-06-05 12:57:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:18,642 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 [2021-06-05 12:57:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:18,643 INFO L225 Difference]: With dead ends: 239 [2021-06-05 12:57:18,643 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 12:57:18,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 12:57:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2021-06-05 12:57:18,658 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) [2021-06-05 12:57:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-05 12:57:18,659 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2021-06-05 12:57:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:18,659 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-05 12:57:18,659 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) [2021-06-05 12:57:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-05 12:57:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 12:57:18,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:18,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:18,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 12:57:18,877 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -655786976, now seen corresponding path program 14 times [2021-06-05 12:57:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:18,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003115644] [2021-06-05 12:57:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:18,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003115644] [2021-06-05 12:57:18,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003115644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877955139] [2021-06-05 12:57:18,915 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:18,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 12:57:18,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 12:57:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877955139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:19,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:19,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6] total 7 [2021-06-05 12:57:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459502689] [2021-06-05 12:57:19,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 12:57:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 12:57:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:19,048 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) [2021-06-05 12:57:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:19,149 INFO L93 Difference]: Finished difference Result 343 states and 728 transitions. [2021-06-05 12:57:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 12:57:19,150 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 [2021-06-05 12:57:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:19,151 INFO L225 Difference]: With dead ends: 343 [2021-06-05 12:57:19,151 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 12:57:19,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 12:57:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 12:57:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 219. [2021-06-05 12:57:19,158 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) [2021-06-05 12:57:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 504 transitions. [2021-06-05 12:57:19,159 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 504 transitions. Word has length 18 [2021-06-05 12:57:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:19,159 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 504 transitions. [2021-06-05 12:57:19,160 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) [2021-06-05 12:57:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 504 transitions. [2021-06-05 12:57:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 12:57:19,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:19,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:19,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:19,383 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash -779503072, now seen corresponding path program 15 times [2021-06-05 12:57:19,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:19,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800635726] [2021-06-05 12:57:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:19,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:19,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800635726] [2021-06-05 12:57:19,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800635726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:19,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542200582] [2021-06-05 12:57:19,419 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) [2021-06-05 12:57:19,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 12:57:19,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 12:57:19,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:19,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542200582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:19,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:19,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 12:57:19,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160274666] [2021-06-05 12:57:19,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:19,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:19,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:19,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:19,492 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) [2021-06-05 12:57:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:19,535 INFO L93 Difference]: Finished difference Result 322 states and 711 transitions. [2021-06-05 12:57:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:19,536 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 [2021-06-05 12:57:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:19,537 INFO L225 Difference]: With dead ends: 322 [2021-06-05 12:57:19,537 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 12:57:19,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 12:57:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-06-05 12:57:19,544 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) [2021-06-05 12:57:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 598 transitions. [2021-06-05 12:57:19,545 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 598 transitions. Word has length 18 [2021-06-05 12:57:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:19,545 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 598 transitions. [2021-06-05 12:57:19,545 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) [2021-06-05 12:57:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 598 transitions. [2021-06-05 12:57:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:19,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:19,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:19,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:19,761 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash -853552034, now seen corresponding path program 16 times [2021-06-05 12:57:19,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:19,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586491718] [2021-06-05 12:57:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:19,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:19,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586491718] [2021-06-05 12:57:19,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586491718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:19,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710404924] [2021-06-05 12:57:19,814 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:19,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 12:57:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:19,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710404924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:19,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:19,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 12:57:19,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631404770] [2021-06-05 12:57:19,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 12:57:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 12:57:19,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:19,930 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) [2021-06-05 12:57:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:20,061 INFO L93 Difference]: Finished difference Result 402 states and 849 transitions. [2021-06-05 12:57:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:20,062 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 [2021-06-05 12:57:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:20,063 INFO L225 Difference]: With dead ends: 402 [2021-06-05 12:57:20,063 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 12:57:20,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 12:57:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 12:57:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 241. [2021-06-05 12:57:20,069 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) [2021-06-05 12:57:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 558 transitions. [2021-06-05 12:57:20,070 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 558 transitions. Word has length 20 [2021-06-05 12:57:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:20,070 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 558 transitions. [2021-06-05 12:57:20,070 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) [2021-06-05 12:57:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 558 transitions. [2021-06-05 12:57:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:20,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:20,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:20,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:20,290 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1535686302, now seen corresponding path program 17 times [2021-06-05 12:57:20,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:20,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114072921] [2021-06-05 12:57:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:20,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114072921] [2021-06-05 12:57:20,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114072921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486156796] [2021-06-05 12:57:20,324 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 [2021-06-05 12:57:20,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 12:57:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:20,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486156796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:20,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:20,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 12:57:20,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948811983] [2021-06-05 12:57:20,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 12:57:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 12:57:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:20,411 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) [2021-06-05 12:57:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:20,514 INFO L93 Difference]: Finished difference Result 375 states and 801 transitions. [2021-06-05 12:57:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:20,514 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 [2021-06-05 12:57:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:20,516 INFO L225 Difference]: With dead ends: 375 [2021-06-05 12:57:20,516 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 12:57:20,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 12:57:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 12:57:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-06-05 12:57:20,522 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) [2021-06-05 12:57:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 616 transitions. [2021-06-05 12:57:20,523 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 616 transitions. Word has length 20 [2021-06-05 12:57:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:20,523 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 616 transitions. [2021-06-05 12:57:20,523 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) [2021-06-05 12:57:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 616 transitions. [2021-06-05 12:57:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:20,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:20,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:20,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 12:57:20,741 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1142582700, now seen corresponding path program 18 times [2021-06-05 12:57:20,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:20,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494528968] [2021-06-05 12:57:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:20,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:20,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494528968] [2021-06-05 12:57:20,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494528968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:20,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604010615] [2021-06-05 12:57:20,779 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 [2021-06-05 12:57:20,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 12:57:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:20,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604010615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:20,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:20,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191272245] [2021-06-05 12:57:20,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:20,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:20,838 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) [2021-06-05 12:57:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:20,916 INFO L93 Difference]: Finished difference Result 358 states and 767 transitions. [2021-06-05 12:57:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:20,916 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 [2021-06-05 12:57:20,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:20,918 INFO L225 Difference]: With dead ends: 358 [2021-06-05 12:57:20,918 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 12:57:20,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 12:57:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2021-06-05 12:57:20,924 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) [2021-06-05 12:57:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 563 transitions. [2021-06-05 12:57:20,946 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 563 transitions. Word has length 20 [2021-06-05 12:57:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:20,946 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 563 transitions. [2021-06-05 12:57:20,946 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) [2021-06-05 12:57:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 563 transitions. [2021-06-05 12:57:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:20,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:20,947 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:21,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 12:57:21,169 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:21,170 INFO L82 PathProgramCache]: Analyzing trace with hash 653699470, now seen corresponding path program 19 times [2021-06-05 12:57:21,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:21,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671186647] [2021-06-05 12:57:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:21,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671186647] [2021-06-05 12:57:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671186647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508510522] [2021-06-05 12:57:21,197 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 [2021-06-05 12:57:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:21,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508510522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:21,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:21,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595119761] [2021-06-05 12:57:21,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:21,267 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) [2021-06-05 12:57:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:21,339 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-06-05 12:57:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 12:57:21,339 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 [2021-06-05 12:57:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:21,341 INFO L225 Difference]: With dead ends: 305 [2021-06-05 12:57:21,341 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 12:57:21,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 12:57:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 12:57:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 250. [2021-06-05 12:57:21,346 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) [2021-06-05 12:57:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 562 transitions. [2021-06-05 12:57:21,346 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 562 transitions. Word has length 20 [2021-06-05 12:57:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:21,347 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 562 transitions. [2021-06-05 12:57:21,347 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) [2021-06-05 12:57:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 562 transitions. [2021-06-05 12:57:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:21,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:21,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:21,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 12:57:21,562 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash -898528034, now seen corresponding path program 20 times [2021-06-05 12:57:21,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:21,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290634768] [2021-06-05 12:57:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:21,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290634768] [2021-06-05 12:57:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290634768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697124209] [2021-06-05 12:57:21,590 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) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:21,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 12:57:21,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:21,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697124209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:21,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:21,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:21,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464403815] [2021-06-05 12:57:21,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:21,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:21,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:21,652 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) [2021-06-05 12:57:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:21,743 INFO L93 Difference]: Finished difference Result 417 states and 879 transitions. [2021-06-05 12:57:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:21,743 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 [2021-06-05 12:57:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:21,745 INFO L225 Difference]: With dead ends: 417 [2021-06-05 12:57:21,745 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 12:57:21,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 12:57:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 268. [2021-06-05 12:57:21,751 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) [2021-06-05 12:57:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 611 transitions. [2021-06-05 12:57:21,752 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 611 transitions. Word has length 20 [2021-06-05 12:57:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:21,752 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 611 transitions. [2021-06-05 12:57:21,752 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) [2021-06-05 12:57:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 611 transitions. [2021-06-05 12:57:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:21,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:21,753 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:21,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 12:57:21,969 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1119101922, now seen corresponding path program 21 times [2021-06-05 12:57:21,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:21,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374273975] [2021-06-05 12:57:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:21,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374273975] [2021-06-05 12:57:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374273975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670911667] [2021-06-05 12:57:21,996 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 [2021-06-05 12:57:22,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 12:57:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 12:57:22,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670911667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:22,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:22,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 12:57:22,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384596515] [2021-06-05 12:57:22,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 12:57:22,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 12:57:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 12:57:22,104 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) [2021-06-05 12:57:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:22,393 INFO L93 Difference]: Finished difference Result 393 states and 847 transitions. [2021-06-05 12:57:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 12:57:22,393 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 [2021-06-05 12:57:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:22,395 INFO L225 Difference]: With dead ends: 393 [2021-06-05 12:57:22,395 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 12:57:22,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 12:57:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 12:57:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 237. [2021-06-05 12:57:22,401 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) [2021-06-05 12:57:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 548 transitions. [2021-06-05 12:57:22,402 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 548 transitions. Word has length 20 [2021-06-05 12:57:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:22,402 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 548 transitions. [2021-06-05 12:57:22,402 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) [2021-06-05 12:57:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 548 transitions. [2021-06-05 12:57:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:22,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:22,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:22,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 12:57:22,609 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:22,610 INFO L82 PathProgramCache]: Analyzing trace with hash 284729366, now seen corresponding path program 22 times [2021-06-05 12:57:22,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:22,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860812086] [2021-06-05 12:57:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:22,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:22,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860812086] [2021-06-05 12:57:22,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860812086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:22,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710873697] [2021-06-05 12:57:22,639 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 [2021-06-05 12:57:22,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 12:57:22,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:22,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710873697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:22,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:22,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977146262] [2021-06-05 12:57:22,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:22,703 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) [2021-06-05 12:57:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:22,772 INFO L93 Difference]: Finished difference Result 329 states and 695 transitions. [2021-06-05 12:57:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 12:57:22,772 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 [2021-06-05 12:57:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:22,773 INFO L225 Difference]: With dead ends: 329 [2021-06-05 12:57:22,773 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 12:57:22,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 12:57:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 12:57:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 211. [2021-06-05 12:57:22,791 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) [2021-06-05 12:57:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 484 transitions. [2021-06-05 12:57:22,792 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 484 transitions. Word has length 20 [2021-06-05 12:57:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:22,792 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 484 transitions. [2021-06-05 12:57:22,792 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) [2021-06-05 12:57:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 484 transitions. [2021-06-05 12:57:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:22,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:22,793 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:23,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:23,009 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:23,009 INFO L82 PathProgramCache]: Analyzing trace with hash -299472784, now seen corresponding path program 23 times [2021-06-05 12:57:23,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:23,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411621573] [2021-06-05 12:57:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:23,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:23,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411621573] [2021-06-05 12:57:23,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411621573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:23,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342749330] [2021-06-05 12:57:23,041 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 [2021-06-05 12:57:23,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 12:57:23,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:23,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342749330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:23,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:23,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 12:57:23,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092558297] [2021-06-05 12:57:23,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:23,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:23,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:23,104 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) [2021-06-05 12:57:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:23,204 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2021-06-05 12:57:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:23,204 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 [2021-06-05 12:57:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:23,205 INFO L225 Difference]: With dead ends: 303 [2021-06-05 12:57:23,205 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 12:57:23,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 12:57:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 12:57:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2021-06-05 12:57:23,210 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) [2021-06-05 12:57:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-05 12:57:23,210 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-05 12:57:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:23,210 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-05 12:57:23,210 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) [2021-06-05 12:57:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-05 12:57:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:23,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:23,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:23,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 12:57:23,412 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 822584944, now seen corresponding path program 24 times [2021-06-05 12:57:23,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:23,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614688811] [2021-06-05 12:57:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:23,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:23,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614688811] [2021-06-05 12:57:23,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614688811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:23,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531750439] [2021-06-05 12:57:23,447 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 [2021-06-05 12:57:23,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 12:57:23,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:23,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531750439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:23,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:23,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 12:57:23,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264004635] [2021-06-05 12:57:23,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:23,520 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) [2021-06-05 12:57:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:23,595 INFO L93 Difference]: Finished difference Result 257 states and 522 transitions. [2021-06-05 12:57:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:23,595 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 [2021-06-05 12:57:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:23,596 INFO L225 Difference]: With dead ends: 257 [2021-06-05 12:57:23,596 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 12:57:23,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 12:57:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 12:57:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-06-05 12:57:23,608 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) [2021-06-05 12:57:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 419 transitions. [2021-06-05 12:57:23,608 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 419 transitions. Word has length 20 [2021-06-05 12:57:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:23,608 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 419 transitions. [2021-06-05 12:57:23,609 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) [2021-06-05 12:57:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 419 transitions. [2021-06-05 12:57:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:23,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:23,609 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:23,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:23,832 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash 618096624, now seen corresponding path program 25 times [2021-06-05 12:57:23,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:23,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433912221] [2021-06-05 12:57:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:23,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:23,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433912221] [2021-06-05 12:57:23,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433912221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:23,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474469703] [2021-06-05 12:57:23,862 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 [2021-06-05 12:57:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:23,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474469703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:23,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:23,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 12:57:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102326936] [2021-06-05 12:57:23,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:23,917 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) [2021-06-05 12:57:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:24,014 INFO L93 Difference]: Finished difference Result 233 states and 480 transitions. [2021-06-05 12:57:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:24,014 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 [2021-06-05 12:57:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:24,015 INFO L225 Difference]: With dead ends: 233 [2021-06-05 12:57:24,015 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 12:57:24,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 12:57:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 12:57:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2021-06-05 12:57:24,019 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) [2021-06-05 12:57:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 412 transitions. [2021-06-05 12:57:24,019 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 412 transitions. Word has length 20 [2021-06-05 12:57:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:24,019 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 412 transitions. [2021-06-05 12:57:24,020 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) [2021-06-05 12:57:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 412 transitions. [2021-06-05 12:57:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:24,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:24,020 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:24,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 12:57:24,243 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash 469387998, now seen corresponding path program 26 times [2021-06-05 12:57:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:24,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620829520] [2021-06-05 12:57:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:24,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620829520] [2021-06-05 12:57:24,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620829520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134010232] [2021-06-05 12:57:24,267 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 [2021-06-05 12:57:24,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 12:57:24,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:24,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:24,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:24,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134010232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:24,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:24,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:24,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764876294] [2021-06-05 12:57:24,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:24,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:24,334 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) [2021-06-05 12:57:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:24,392 INFO L93 Difference]: Finished difference Result 289 states and 591 transitions. [2021-06-05 12:57:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:24,392 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 [2021-06-05 12:57:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:24,393 INFO L225 Difference]: With dead ends: 289 [2021-06-05 12:57:24,393 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 12:57:24,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 12:57:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-06-05 12:57:24,397 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) [2021-06-05 12:57:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 448 transitions. [2021-06-05 12:57:24,398 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 448 transitions. Word has length 20 [2021-06-05 12:57:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:24,398 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 448 transitions. [2021-06-05 12:57:24,398 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) [2021-06-05 12:57:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 448 transitions. [2021-06-05 12:57:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:24,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:24,399 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:24,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:24,605 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:24,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2141528628, now seen corresponding path program 27 times [2021-06-05 12:57:24,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:24,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746404823] [2021-06-05 12:57:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746404823] [2021-06-05 12:57:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746404823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390637383] [2021-06-05 12:57:24,631 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 [2021-06-05 12:57:24,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 12:57:24,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:24,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:24,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390637383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:24,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:24,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:24,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114088796] [2021-06-05 12:57:24,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:24,711 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) [2021-06-05 12:57:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:24,784 INFO L93 Difference]: Finished difference Result 308 states and 651 transitions. [2021-06-05 12:57:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:24,784 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 [2021-06-05 12:57:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:24,785 INFO L225 Difference]: With dead ends: 308 [2021-06-05 12:57:24,785 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 12:57:24,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 12:57:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 218. [2021-06-05 12:57:24,790 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) [2021-06-05 12:57:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 494 transitions. [2021-06-05 12:57:24,790 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 494 transitions. Word has length 20 [2021-06-05 12:57:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:24,790 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 494 transitions. [2021-06-05 12:57:24,790 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) [2021-06-05 12:57:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 494 transitions. [2021-06-05 12:57:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:24,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:24,791 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:25,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 12:57:25,013 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:25,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1652645398, now seen corresponding path program 28 times [2021-06-05 12:57:25,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:25,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896691563] [2021-06-05 12:57:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:25,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896691563] [2021-06-05 12:57:25,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896691563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:25,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467055945] [2021-06-05 12:57:25,040 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) [2021-06-05 12:57:25,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 12:57:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:25,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467055945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:25,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:25,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 12:57:25,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609364419] [2021-06-05 12:57:25,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:25,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:25,113 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) [2021-06-05 12:57:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:25,175 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2021-06-05 12:57:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 12:57:25,175 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 [2021-06-05 12:57:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:25,176 INFO L225 Difference]: With dead ends: 302 [2021-06-05 12:57:25,176 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 12:57:25,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 12:57:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 12:57:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 218. [2021-06-05 12:57:25,183 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) [2021-06-05 12:57:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-06-05 12:57:25,183 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 20 [2021-06-05 12:57:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:25,183 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-06-05 12:57:25,183 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) [2021-06-05 12:57:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-06-05 12:57:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:25,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:25,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:25,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:25,407 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443248, now seen corresponding path program 29 times [2021-06-05 12:57:25,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:25,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207807145] [2021-06-05 12:57:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:25,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:25,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207807145] [2021-06-05 12:57:25,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207807145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:25,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065657943] [2021-06-05 12:57:25,442 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 [2021-06-05 12:57:25,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 12:57:25,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065657943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:25,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:25,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 12:57:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438921969] [2021-06-05 12:57:25,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:25,506 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) [2021-06-05 12:57:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:25,606 INFO L93 Difference]: Finished difference Result 318 states and 670 transitions. [2021-06-05 12:57:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:25,607 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 [2021-06-05 12:57:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:25,608 INFO L225 Difference]: With dead ends: 318 [2021-06-05 12:57:25,608 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 12:57:25,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 12:57:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 12:57:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-05 12:57:25,612 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) [2021-06-05 12:57:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 501 transitions. [2021-06-05 12:57:25,612 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 501 transitions. Word has length 20 [2021-06-05 12:57:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:25,612 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 501 transitions. [2021-06-05 12:57:25,612 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) [2021-06-05 12:57:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 501 transitions. [2021-06-05 12:57:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:25,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:25,613 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:25,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 12:57:25,829 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2104466320, now seen corresponding path program 30 times [2021-06-05 12:57:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:25,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460033388] [2021-06-05 12:57:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:25,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:25,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460033388] [2021-06-05 12:57:25,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460033388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:25,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490144085] [2021-06-05 12:57:25,857 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 [2021-06-05 12:57:25,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 12:57:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:25,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490144085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:25,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:25,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 12:57:25,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905212001] [2021-06-05 12:57:25,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:25,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 12:57:25,920 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) [2021-06-05 12:57:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:25,991 INFO L93 Difference]: Finished difference Result 327 states and 677 transitions. [2021-06-05 12:57:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:25,991 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 [2021-06-05 12:57:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:25,992 INFO L225 Difference]: With dead ends: 327 [2021-06-05 12:57:25,992 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 12:57:25,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 12:57:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 12:57:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-05 12:57:25,996 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) [2021-06-05 12:57:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 499 transitions. [2021-06-05 12:57:25,997 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 499 transitions. Word has length 20 [2021-06-05 12:57:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:25,997 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 499 transitions. [2021-06-05 12:57:25,997 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) [2021-06-05 12:57:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 499 transitions. [2021-06-05 12:57:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:25,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:25,998 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:26,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:26,209 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1481240012, now seen corresponding path program 31 times [2021-06-05 12:57:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572213115] [2021-06-05 12:57:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:26,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:26,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572213115] [2021-06-05 12:57:26,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572213115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:26,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747423200] [2021-06-05 12:57:26,241 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 [2021-06-05 12:57:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747423200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:26,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:26,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 12:57:26,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230117380] [2021-06-05 12:57:26,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 12:57:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 12:57:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:26,318 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) [2021-06-05 12:57:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:26,432 INFO L93 Difference]: Finished difference Result 300 states and 625 transitions. [2021-06-05 12:57:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:26,433 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 [2021-06-05 12:57:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:26,434 INFO L225 Difference]: With dead ends: 300 [2021-06-05 12:57:26,434 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 12:57:26,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 12:57:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 12:57:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 206. [2021-06-05 12:57:26,437 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) [2021-06-05 12:57:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 462 transitions. [2021-06-05 12:57:26,438 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 462 transitions. Word has length 20 [2021-06-05 12:57:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:26,438 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 462 transitions. [2021-06-05 12:57:26,438 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) [2021-06-05 12:57:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 462 transitions. [2021-06-05 12:57:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 12:57:26,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:26,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:26,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 12:57:26,662 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:26,662 INFO L82 PathProgramCache]: Analyzing trace with hash -33586060, now seen corresponding path program 32 times [2021-06-05 12:57:26,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:26,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071087637] [2021-06-05 12:57:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:26,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:26,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071087637] [2021-06-05 12:57:26,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071087637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:26,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547710756] [2021-06-05 12:57:26,694 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 [2021-06-05 12:57:26,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 12:57:26,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:26,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:26,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547710756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:26,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:26,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 12:57:26,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766124261] [2021-06-05 12:57:26,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 12:57:26,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 12:57:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 12:57:26,756 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) [2021-06-05 12:57:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:26,854 INFO L93 Difference]: Finished difference Result 296 states and 607 transitions. [2021-06-05 12:57:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 12:57:26,855 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 [2021-06-05 12:57:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:26,856 INFO L225 Difference]: With dead ends: 296 [2021-06-05 12:57:26,856 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 12:57:26,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 12:57:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 12:57:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-06-05 12:57:26,859 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) [2021-06-05 12:57:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 473 transitions. [2021-06-05 12:57:26,860 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 473 transitions. Word has length 20 [2021-06-05 12:57:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:26,860 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 473 transitions. [2021-06-05 12:57:26,860 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) [2021-06-05 12:57:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 473 transitions. [2021-06-05 12:57:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 12:57:26,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:26,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:27,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 12:57:27,077 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1571256086, now seen corresponding path program 33 times [2021-06-05 12:57:27,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:27,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646693496] [2021-06-05 12:57:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:27,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:27,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646693496] [2021-06-05 12:57:27,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646693496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:27,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322909338] [2021-06-05 12:57:27,115 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 [2021-06-05 12:57:27,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 12:57:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:27,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 12:57:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322909338] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:27,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 12:57:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-05 12:57:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143862480] [2021-06-05 12:57:27,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:27,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:27,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:27,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:27,225 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) [2021-06-05 12:57:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:27,302 INFO L93 Difference]: Finished difference Result 239 states and 520 transitions. [2021-06-05 12:57:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:27,302 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 [2021-06-05 12:57:27,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:27,303 INFO L225 Difference]: With dead ends: 239 [2021-06-05 12:57:27,303 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 12:57:27,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 12:57:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 12:57:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2021-06-05 12:57:27,306 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) [2021-06-05 12:57:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 456 transitions. [2021-06-05 12:57:27,306 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 456 transitions. Word has length 22 [2021-06-05 12:57:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:27,306 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 456 transitions. [2021-06-05 12:57:27,306 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) [2021-06-05 12:57:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 456 transitions. [2021-06-05 12:57:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 12:57:27,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:27,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:27,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 12:57:27,521 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash 792994068, now seen corresponding path program 34 times [2021-06-05 12:57:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:27,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305106444] [2021-06-05 12:57:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:27,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:27,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305106444] [2021-06-05 12:57:27,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305106444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:27,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233605969] [2021-06-05 12:57:27,562 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 [2021-06-05 12:57:27,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 12:57:27,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:27,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 12:57:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 12:57:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233605969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:27,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:27,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:27,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143751237] [2021-06-05 12:57:27,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:27,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:27,630 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) [2021-06-05 12:57:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:27,692 INFO L93 Difference]: Finished difference Result 322 states and 668 transitions. [2021-06-05 12:57:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:27,692 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 [2021-06-05 12:57:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:27,693 INFO L225 Difference]: With dead ends: 322 [2021-06-05 12:57:27,693 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 12:57:27,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 12:57:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2021-06-05 12:57:27,697 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) [2021-06-05 12:57:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 539 transitions. [2021-06-05 12:57:27,697 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 539 transitions. Word has length 22 [2021-06-05 12:57:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:27,698 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 539 transitions. [2021-06-05 12:57:27,698 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) [2021-06-05 12:57:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 539 transitions. [2021-06-05 12:57:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 12:57:27,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:27,698 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:27,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 12:57:27,913 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1965218720, now seen corresponding path program 35 times [2021-06-05 12:57:27,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:27,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130674480] [2021-06-05 12:57:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:27,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130674480] [2021-06-05 12:57:27,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130674480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058136900] [2021-06-05 12:57:27,951 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 [2021-06-05 12:57:27,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 12:57:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 12:57:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:28,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058136900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:28,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:28,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:28,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053735447] [2021-06-05 12:57:28,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:28,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:28,018 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) [2021-06-05 12:57:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:28,082 INFO L93 Difference]: Finished difference Result 375 states and 800 transitions. [2021-06-05 12:57:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:28,083 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 [2021-06-05 12:57:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:28,084 INFO L225 Difference]: With dead ends: 375 [2021-06-05 12:57:28,084 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 12:57:28,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 12:57:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 294. [2021-06-05 12:57:28,089 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) [2021-06-05 12:57:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 664 transitions. [2021-06-05 12:57:28,090 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 664 transitions. Word has length 22 [2021-06-05 12:57:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:28,090 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 664 transitions. [2021-06-05 12:57:28,090 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) [2021-06-05 12:57:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 664 transitions. [2021-06-05 12:57:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 12:57:28,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:28,091 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:28,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 12:57:28,314 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash 116908384, now seen corresponding path program 36 times [2021-06-05 12:57:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:28,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80432396] [2021-06-05 12:57:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:28,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:28,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80432396] [2021-06-05 12:57:28,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80432396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:28,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95051151] [2021-06-05 12:57:28,361 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 [2021-06-05 12:57:28,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 12:57:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 12:57:28,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95051151] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:28,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 12:57:28,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-05 12:57:28,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389348681] [2021-06-05 12:57:28,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:28,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 12:57:28,471 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) [2021-06-05 12:57:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:28,551 INFO L93 Difference]: Finished difference Result 320 states and 710 transitions. [2021-06-05 12:57:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:28,551 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 [2021-06-05 12:57:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:28,552 INFO L225 Difference]: With dead ends: 320 [2021-06-05 12:57:28,552 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 12:57:28,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 12:57:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 12:57:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 291. [2021-06-05 12:57:28,556 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) [2021-06-05 12:57:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 636 transitions. [2021-06-05 12:57:28,557 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 636 transitions. Word has length 22 [2021-06-05 12:57:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:28,557 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 636 transitions. [2021-06-05 12:57:28,557 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) [2021-06-05 12:57:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 636 transitions. [2021-06-05 12:57:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 12:57:28,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:28,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:28,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 12:57:28,773 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -694299372, now seen corresponding path program 37 times [2021-06-05 12:57:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:28,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874217396] [2021-06-05 12:57:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:28,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:28,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874217396] [2021-06-05 12:57:28,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874217396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:28,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855692282] [2021-06-05 12:57:28,820 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 [2021-06-05 12:57:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 12:57:28,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:28,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855692282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:28,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:28,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:28,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393330759] [2021-06-05 12:57:28,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:28,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:28,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:28,899 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) [2021-06-05 12:57:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:28,962 INFO L93 Difference]: Finished difference Result 425 states and 900 transitions. [2021-06-05 12:57:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:28,962 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 [2021-06-05 12:57:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:28,964 INFO L225 Difference]: With dead ends: 425 [2021-06-05 12:57:28,964 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 12:57:28,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 12:57:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-05 12:57:28,968 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) [2021-06-05 12:57:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 777 transitions. [2021-06-05 12:57:28,969 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 777 transitions. Word has length 22 [2021-06-05 12:57:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:28,969 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 777 transitions. [2021-06-05 12:57:28,969 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) [2021-06-05 12:57:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 777 transitions. [2021-06-05 12:57:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 12:57:28,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:28,970 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:29,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 12:57:29,184 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1224912364, now seen corresponding path program 38 times [2021-06-05 12:57:29,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:29,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710250182] [2021-06-05 12:57:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 12:57:29,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710250182] [2021-06-05 12:57:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710250182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920899291] [2021-06-05 12:57:29,220 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 [2021-06-05 12:57:29,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 12:57:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 12:57:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:29,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920899291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:29,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:29,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2021-06-05 12:57:29,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32278743] [2021-06-05 12:57:29,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 12:57:29,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 12:57:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 12:57:29,385 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) [2021-06-05 12:57:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:29,592 INFO L93 Difference]: Finished difference Result 623 states and 1302 transitions. [2021-06-05 12:57:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 12:57:29,592 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 [2021-06-05 12:57:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:29,594 INFO L225 Difference]: With dead ends: 623 [2021-06-05 12:57:29,594 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 12:57:29,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 12:57:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 12:57:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 410. [2021-06-05 12:57:29,602 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) [2021-06-05 12:57:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 927 transitions. [2021-06-05 12:57:29,602 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 927 transitions. Word has length 22 [2021-06-05 12:57:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:29,603 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 927 transitions. [2021-06-05 12:57:29,603 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) [2021-06-05 12:57:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 927 transitions. [2021-06-05 12:57:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 12:57:29,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:29,604 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:29,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:29,817 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash -972138362, now seen corresponding path program 39 times [2021-06-05 12:57:29,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:29,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84028348] [2021-06-05 12:57:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:29,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:29,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84028348] [2021-06-05 12:57:29,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84028348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103190483] [2021-06-05 12:57:29,865 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 [2021-06-05 12:57:29,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 12:57:29,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 12:57:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 12:57:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 12:57:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103190483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:29,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 12:57:29,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-06-05 12:57:29,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945347767] [2021-06-05 12:57:29,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 12:57:29,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:29,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 12:57:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 12:57:29,967 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) [2021-06-05 12:57:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:30,049 INFO L93 Difference]: Finished difference Result 428 states and 965 transitions. [2021-06-05 12:57:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 12:57:30,049 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 [2021-06-05 12:57:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:30,049 INFO L225 Difference]: With dead ends: 428 [2021-06-05 12:57:30,050 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 12:57:30,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 12:57:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 12:57:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 12:57:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 12:57:30,050 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-05 12:57:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:30,050 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 12:57:30,050 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) [2021-06-05 12:57:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 12:57:30,051 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 12:57:30,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:30,254 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 12:57:30,256 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 12:57:30 BasicIcfg [2021-06-05 12:57:30,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 12:57:30,257 INFO L168 Benchmark]: Toolchain (without parser) took 18025.59 ms. Allocated memory was 379.6 MB in the beginning and 457.2 MB in the end (delta: 77.6 MB). Free memory was 359.1 MB in the beginning and 256.0 MB in the end (delta: 103.2 MB). Peak memory consumption was 182.7 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:30,257 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 379.6 MB. Free memory was 360.1 MB in the beginning and 360.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 12:57:30,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.45 ms. Allocated memory is still 379.6 MB. Free memory was 359.0 MB in the beginning and 357.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:30,257 INFO L168 Benchmark]: Boogie Preprocessor took 11.14 ms. Allocated memory is still 379.6 MB. Free memory was 357.6 MB in the beginning and 356.6 MB in the end (delta: 954.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:30,257 INFO L168 Benchmark]: RCFGBuilder took 228.57 ms. Allocated memory is still 379.6 MB. Free memory was 356.5 MB in the beginning and 347.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:30,257 INFO L168 Benchmark]: TraceAbstraction took 17750.70 ms. Allocated memory was 379.6 MB in the beginning and 457.2 MB in the end (delta: 77.6 MB). Free memory was 346.6 MB in the beginning and 256.0 MB in the end (delta: 90.7 MB). Peak memory consumption was 170.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:30,258 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 379.6 MB. Free memory was 360.1 MB in the beginning and 360.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.45 ms. Allocated memory is still 379.6 MB. Free memory was 359.0 MB in the beginning and 357.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.14 ms. Allocated memory is still 379.6 MB. Free memory was 357.6 MB in the beginning and 356.6 MB in the end (delta: 954.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 228.57 ms. Allocated memory is still 379.6 MB. Free memory was 356.5 MB in the beginning and 347.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 17750.70 ms. Allocated memory was 379.6 MB in the beginning and 457.2 MB in the end (delta: 77.6 MB). Free memory was 346.6 MB in the beginning and 256.0 MB in the end (delta: 90.7 MB). Peak memory consumption was 170.1 MB. Max. memory is 16.0 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 with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17625.9ms, OverallIterations: 43, TraceHistogramMax: 4, EmptinessCheckTime: 34.5ms, AutomataDifference: 3751.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 851 SDtfs, 2233 SDslu, 2558 SDs, 0 SdLazy, 3384 SolverSat, 492 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1833.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1102 GetRequests, 676 SyntacticMatches, 60 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2286.0ms 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: 314.4ms AutomataMinimizationTime, 43 MinimizatonAttempts, 2839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 86.0ms SsaConstructionTime, 318.4ms SatisfiabilityAnalysisTime, 3576.1ms 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...