/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.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 03:09:17,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:09:17,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:09:17,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:09:17,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:09:17,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:09:17,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:09:17,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:09:17,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:09:17,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:09:17,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:09:17,196 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:09:17,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:09:17,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:09:17,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:09:17,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:09:17,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:09:17,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:09:17,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:09:17,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:09:17,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:09:17,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:09:17,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:09:17,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:09:17,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:09:17,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:09:17,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:09:17,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:09:17,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:09:17,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:09:17,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:09:17,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:09:17,526 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:09:17,529 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:09:17,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2021-06-05 03:09:17,530 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2021-06-05 03:09:17,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:09:17,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:09:17,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:09:17,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:09:17,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:09:17,575 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 03:09:17" (1/1) ... [2021-06-05 03:09:17,580 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 03:09:17" (1/1) ... [2021-06-05 03:09:17,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:09:17,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:09:17,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:09:17,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:09:17,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/1) ... [2021-06-05 03:09:17,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:09:17,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:09:17,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:09:17,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:09:17,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (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 03:09:17,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:09:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:09:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:09:17,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2021-06-05 03:09:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2021-06-05 03:09:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2021-06-05 03:09:17,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2021-06-05 03:09:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2021-06-05 03:09:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2021-06-05 03:09:17,686 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 03:09:17,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:09:17,833 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:09:17,834 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:09:17 BoogieIcfgContainer [2021-06-05 03:09:17,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:09:17,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:09:17,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:09:17,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:09:17,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:09:17" (1/2) ... [2021-06-05 03:09:17,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3629b001 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:09:17, skipping insertion in model container [2021-06-05 03:09:17,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:09:17" (2/2) ... [2021-06-05 03:09:17,841 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2021-06-05 03:09:17,846 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:09:17,846 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:09:17,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:09:17,850 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:09:17,892 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 03:09:17,928 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:09:17,960 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:09:17,960 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:09:17,960 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:09:17,960 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:09:17,960 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:09:17,960 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:09:17,961 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:09:17,961 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:09:17,969 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2021-06-05 03:09:18,009 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 03:09:18,012 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 03:09:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 03:09:18,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:18,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:18,018 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1474916704, now seen corresponding path program 1 times [2021-06-05 03:09:18,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:18,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347752730] [2021-06-05 03:09:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:18,154 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 03:09:18,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:18,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347752730] [2021-06-05 03:09:18,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347752730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:18,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:18,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 03:09:18,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092082689] [2021-06-05 03:09:18,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:09:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:18,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:09:18,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:09:18,172 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 03:09:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:18,216 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-05 03:09:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:09:18,218 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 03:09:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:18,225 INFO L225 Difference]: With dead ends: 63 [2021-06-05 03:09:18,225 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 03:09:18,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:09:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 03:09:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-06-05 03:09:18,263 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 03:09:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 03:09:18,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2021-06-05 03:09:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:18,270 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 03:09:18,271 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 03:09:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 03:09:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:09:18,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:18,272 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:18,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:09:18,272 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2103181474, now seen corresponding path program 1 times [2021-06-05 03:09:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365697153] [2021-06-05 03:09:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:18,378 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 03:09:18,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:18,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365697153] [2021-06-05 03:09:18,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365697153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:18,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283307661] [2021-06-05 03:09:18,379 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 03:09:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 03:09:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:18,504 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 03:09:18,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283307661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:18,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:18,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 03:09:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884207381] [2021-06-05 03:09:18,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:18,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:18,509 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 03:09:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:18,602 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-06-05 03:09:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:09:18,603 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 03:09:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:18,606 INFO L225 Difference]: With dead ends: 78 [2021-06-05 03:09:18,606 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 03:09:18,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 03:09:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-06-05 03:09:18,621 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 03:09:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 03:09:18,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-05 03:09:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:18,624 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 03:09:18,624 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 03:09:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 03:09:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:09:18,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:18,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:18,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 03:09:18,851 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -85551518, now seen corresponding path program 1 times [2021-06-05 03:09:18,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:18,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310974729] [2021-06-05 03:09:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:18,920 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 03:09:18,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:18,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310974729] [2021-06-05 03:09:18,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310974729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:18,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:18,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:09:18,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930426865] [2021-06-05 03:09:18,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:18,923 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 03:09:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:18,952 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2021-06-05 03:09:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:09:18,953 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 03:09:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:18,955 INFO L225 Difference]: With dead ends: 51 [2021-06-05 03:09:18,958 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 03:09:18,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 03:09:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-06-05 03:09:18,962 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 03:09:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-05 03:09:18,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-06-05 03:09:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:18,963 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-05 03:09:18,963 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 03:09:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-05 03:09:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:09:18,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:18,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:18,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:09:18,964 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1933209310, now seen corresponding path program 2 times [2021-06-05 03:09:18,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:18,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883113228] [2021-06-05 03:09:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:19,007 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 03:09:19,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883113228] [2021-06-05 03:09:19,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883113228] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:19,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:19,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:09:19,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573096126] [2021-06-05 03:09:19,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:09:19,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:09:19,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:19,015 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 03:09:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:19,042 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-06-05 03:09:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:19,042 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 03:09:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:19,043 INFO L225 Difference]: With dead ends: 48 [2021-06-05 03:09:19,043 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 03:09:19,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 03:09:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-06-05 03:09:19,056 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 03:09:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2021-06-05 03:09:19,059 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2021-06-05 03:09:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:19,060 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2021-06-05 03:09:19,060 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 03:09:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2021-06-05 03:09:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:09:19,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:19,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:19,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:09:19,061 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1742393248, now seen corresponding path program 1 times [2021-06-05 03:09:19,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:19,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781833061] [2021-06-05 03:09:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:19,147 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 03:09:19,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:19,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781833061] [2021-06-05 03:09:19,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781833061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:19,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394095935] [2021-06-05 03:09:19,148 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 03:09:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:19,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:19,278 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 03:09:19,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394095935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:19,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:19,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-06-05 03:09:19,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843799680] [2021-06-05 03:09:19,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:19,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:19,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:19,280 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 03:09:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:19,314 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-05 03:09:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:09:19,314 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 03:09:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:19,315 INFO L225 Difference]: With dead ends: 107 [2021-06-05 03:09:19,315 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 03:09:19,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 03:09:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-06-05 03:09:19,320 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 03:09:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2021-06-05 03:09:19,321 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2021-06-05 03:09:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:19,321 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2021-06-05 03:09:19,321 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 03:09:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2021-06-05 03:09:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:09:19,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:19,322 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:19,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:19,529 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1371911392, now seen corresponding path program 2 times [2021-06-05 03:09:19,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:19,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082343623] [2021-06-05 03:09:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:19,573 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 03:09:19,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082343623] [2021-06-05 03:09:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082343623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:19,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:09:19,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:09:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196623095] [2021-06-05 03:09:19,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:09:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:19,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:09:19,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:19,579 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 03:09:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:19,611 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2021-06-05 03:09:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:09:19,612 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 03:09:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:19,613 INFO L225 Difference]: With dead ends: 127 [2021-06-05 03:09:19,613 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 03:09:19,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:09:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 03:09:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-06-05 03:09:19,619 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 03:09:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-06-05 03:09:19,620 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2021-06-05 03:09:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:19,620 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-06-05 03:09:19,620 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 03:09:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-06-05 03:09:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:19,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:19,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:19,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:09:19,622 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1755689310, now seen corresponding path program 3 times [2021-06-05 03:09:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:19,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907849259] [2021-06-05 03:09:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:19,681 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 03:09:19,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:19,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907849259] [2021-06-05 03:09:19,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907849259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:19,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776007905] [2021-06-05 03:09:19,682 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 03:09:19,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:09:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:19,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:19,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:19,753 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 03:09:19,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776007905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:19,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:19,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:09:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598719156] [2021-06-05 03:09:19,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:19,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:19,755 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 03:09:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:19,869 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2021-06-05 03:09:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:09:19,869 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 03:09:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:19,871 INFO L225 Difference]: With dead ends: 176 [2021-06-05 03:09:19,871 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 03:09:19,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 03:09:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2021-06-05 03:09:19,884 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 03:09:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-06-05 03:09:19,884 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2021-06-05 03:09:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-06-05 03:09:19,885 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 03:09:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-06-05 03:09:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:19,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:19,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:20,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:20,114 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash -627140766, now seen corresponding path program 4 times [2021-06-05 03:09:20,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:20,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642808039] [2021-06-05 03:09:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:20,159 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 03:09:20,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:20,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642808039] [2021-06-05 03:09:20,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642808039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:20,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127675943] [2021-06-05 03:09:20,160 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 03:09:20,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:09:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:09:20,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127675943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:20,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:20,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:09:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803419732] [2021-06-05 03:09:20,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:20,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:20,228 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:09:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:20,359 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2021-06-05 03:09:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:09:20,359 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 03:09:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:20,360 INFO L225 Difference]: With dead ends: 161 [2021-06-05 03:09:20,360 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 03:09:20,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:09:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 03:09:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2021-06-05 03:09:20,366 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 03:09:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2021-06-05 03:09:20,367 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2021-06-05 03:09:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:20,367 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2021-06-05 03:09:20,367 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 03:09:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2021-06-05 03:09:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:20,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:20,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:20,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:20,577 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2026275120, now seen corresponding path program 5 times [2021-06-05 03:09:20,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:20,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773592898] [2021-06-05 03:09:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:20,632 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 03:09:20,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:20,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773592898] [2021-06-05 03:09:20,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773592898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:20,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256505333] [2021-06-05 03:09:20,633 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 03:09:20,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:09:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:20,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:20,706 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 03:09:20,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256505333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:20,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:20,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:09:20,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701296812] [2021-06-05 03:09:20,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:20,708 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 03:09:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:20,785 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2021-06-05 03:09:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:09:20,786 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 03:09:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:20,787 INFO L225 Difference]: With dead ends: 154 [2021-06-05 03:09:20,787 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 03:09:20,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 03:09:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2021-06-05 03:09:20,803 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 03:09:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2021-06-05 03:09:20,804 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2021-06-05 03:09:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:20,805 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2021-06-05 03:09:20,805 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 03:09:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2021-06-05 03:09:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:20,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:20,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:21,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:21,010 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1537391890, now seen corresponding path program 6 times [2021-06-05 03:09:21,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:21,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482961582] [2021-06-05 03:09:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:21,038 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 03:09:21,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482961582] [2021-06-05 03:09:21,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482961582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076406473] [2021-06-05 03:09:21,039 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 03:09:21,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:09:21,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:21,098 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 03:09:21,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076406473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:21,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:21,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:09:21,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531910173] [2021-06-05 03:09:21,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:21,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:21,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:21,100 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 03:09:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:21,162 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2021-06-05 03:09:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:09:21,162 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 03:09:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:21,164 INFO L225 Difference]: With dead ends: 144 [2021-06-05 03:09:21,165 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 03:09:21,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 03:09:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-05 03:09:21,172 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 03:09:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-05 03:09:21,173 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2021-06-05 03:09:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:21,173 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-05 03:09:21,173 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 03:09:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-05 03:09:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:21,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:21,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:21,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:21,389 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2099418526, now seen corresponding path program 7 times [2021-06-05 03:09:21,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:21,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905615658] [2021-06-05 03:09:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:21,419 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 03:09:21,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905615658] [2021-06-05 03:09:21,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905615658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835538024] [2021-06-05 03:09:21,419 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 03:09:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:21,508 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 03:09:21,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835538024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:21,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:21,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:09:21,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776590960] [2021-06-05 03:09:21,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:21,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:21,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:21,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:21,510 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 03:09:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:21,571 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2021-06-05 03:09:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:09:21,571 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 03:09:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:21,573 INFO L225 Difference]: With dead ends: 195 [2021-06-05 03:09:21,573 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 03:09:21,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 03:09:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2021-06-05 03:09:21,577 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 03:09:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2021-06-05 03:09:21,578 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2021-06-05 03:09:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:21,579 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2021-06-05 03:09:21,579 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 03:09:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2021-06-05 03:09:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:21,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:21,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:21,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:21,803 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:21,804 INFO L82 PathProgramCache]: Analyzing trace with hash -177918814, now seen corresponding path program 8 times [2021-06-05 03:09:21,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:21,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036377660] [2021-06-05 03:09:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:21,840 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 03:09:21,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036377660] [2021-06-05 03:09:21,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036377660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087467852] [2021-06-05 03:09:21,840 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 03:09:21,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:09:21,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:21,905 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 03:09:21,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087467852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:21,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:21,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:09:21,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491005832] [2021-06-05 03:09:21,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:21,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:21,907 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 03:09:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:21,966 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2021-06-05 03:09:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:09:21,967 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 03:09:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:21,968 INFO L225 Difference]: With dead ends: 177 [2021-06-05 03:09:21,968 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 03:09:21,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 03:09:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-06-05 03:09:21,972 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 03:09:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2021-06-05 03:09:21,973 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2021-06-05 03:09:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:21,973 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2021-06-05 03:09:21,973 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 03:09:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2021-06-05 03:09:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:21,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:21,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:22,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 03:09:22,189 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -523408140, now seen corresponding path program 9 times [2021-06-05 03:09:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:22,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852931080] [2021-06-05 03:09:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:22,214 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 03:09:22,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852931080] [2021-06-05 03:09:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852931080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645694869] [2021-06-05 03:09:22,214 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 03:09:22,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:09:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:22,278 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 03:09:22,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645694869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:22,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:22,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:09:22,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286030544] [2021-06-05 03:09:22,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:22,280 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 03:09:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:22,343 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2021-06-05 03:09:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:09:22,343 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 03:09:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:22,344 INFO L225 Difference]: With dead ends: 184 [2021-06-05 03:09:22,344 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 03:09:22,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 03:09:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2021-06-05 03:09:22,349 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 03:09:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-06-05 03:09:22,349 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2021-06-05 03:09:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:22,350 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-06-05 03:09:22,350 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 03:09:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-06-05 03:09:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:22,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:22,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:22,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:22,573 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1012291370, now seen corresponding path program 10 times [2021-06-05 03:09:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:22,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377835549] [2021-06-05 03:09:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:22,601 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 03:09:22,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377835549] [2021-06-05 03:09:22,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377835549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3300116] [2021-06-05 03:09:22,601 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 03:09:22,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:09:22,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:22,658 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 03:09:22,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3300116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:22,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:22,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:09:22,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679013535] [2021-06-05 03:09:22,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:22,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:22,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:22,659 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 03:09:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:22,721 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2021-06-05 03:09:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:09:22,722 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 03:09:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:22,723 INFO L225 Difference]: With dead ends: 192 [2021-06-05 03:09:22,723 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 03:09:22,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 03:09:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2021-06-05 03:09:22,727 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 03:09:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2021-06-05 03:09:22,728 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2021-06-05 03:09:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:22,728 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2021-06-05 03:09:22,728 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 03:09:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2021-06-05 03:09:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:22,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:22,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:22,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:22,941 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:22,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1596493520, now seen corresponding path program 11 times [2021-06-05 03:09:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:22,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741349954] [2021-06-05 03:09:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:22,968 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 03:09:22,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:22,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741349954] [2021-06-05 03:09:22,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741349954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:22,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913898472] [2021-06-05 03:09:22,969 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 03:09:22,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:09:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:23,028 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 03:09:23,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913898472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:23,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:23,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:09:23,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341269265] [2021-06-05 03:09:23,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:23,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:23,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:23,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:23,030 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 03:09:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:23,122 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2021-06-05 03:09:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:09:23,123 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 03:09:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:23,124 INFO L225 Difference]: With dead ends: 173 [2021-06-05 03:09:23,124 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 03:09:23,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 03:09:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-06-05 03:09:23,131 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 03:09:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2021-06-05 03:09:23,132 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2021-06-05 03:09:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:23,132 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2021-06-05 03:09:23,132 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 03:09:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2021-06-05 03:09:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:09:23,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:23,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 03:09:23,356 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -474435792, now seen corresponding path program 12 times [2021-06-05 03:09:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:23,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518491300] [2021-06-05 03:09:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:23,379 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 03:09:23,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:23,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518491300] [2021-06-05 03:09:23,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518491300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:23,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470966584] [2021-06-05 03:09:23,379 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 03:09:23,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:09:23,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:09:23,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:23,437 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 03:09:23,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470966584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:23,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:23,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:09:23,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522699836] [2021-06-05 03:09:23,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:23,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:23,439 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 03:09:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:23,511 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-06-05 03:09:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:09:23,511 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 03:09:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:23,513 INFO L225 Difference]: With dead ends: 188 [2021-06-05 03:09:23,513 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 03:09:23,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:09:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 03:09:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-06-05 03:09:23,518 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 03:09:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-06-05 03:09:23,519 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2021-06-05 03:09:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:23,519 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-06-05 03:09:23,519 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 03:09:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-06-05 03:09:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:09:23,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:23,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:23,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 03:09:23,737 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -734527072, now seen corresponding path program 13 times [2021-06-05 03:09:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:23,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035239446] [2021-06-05 03:09:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:23,775 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 03:09:23,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035239446] [2021-06-05 03:09:23,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035239446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345227415] [2021-06-05 03:09:23,775 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 03:09:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:23,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:09:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:23,855 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 03:09:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345227415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:23,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:23,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 03:09:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063622845] [2021-06-05 03:09:23,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:09:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:09:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:23,857 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 03:09:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:23,896 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2021-06-05 03:09:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:23,897 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 03:09:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:23,898 INFO L225 Difference]: With dead ends: 239 [2021-06-05 03:09:23,899 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 03:09:23,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 03:09:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2021-06-05 03:09:23,904 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 03:09:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-05 03:09:23,905 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2021-06-05 03:09:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:23,907 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-05 03:09:23,907 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 03:09:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-05 03:09:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:09:23,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:23,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:24,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 03:09:24,132 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:24,132 INFO L82 PathProgramCache]: Analyzing trace with hash -655786976, now seen corresponding path program 14 times [2021-06-05 03:09:24,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:24,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096696204] [2021-06-05 03:09:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:24,163 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 03:09:24,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096696204] [2021-06-05 03:09:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096696204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871152140] [2021-06-05 03:09:24,163 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 03:09:24,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:09:24,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:09:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:24,284 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 03:09:24,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871152140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:24,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:24,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6] total 7 [2021-06-05 03:09:24,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753175672] [2021-06-05 03:09:24,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:09:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:09:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:24,285 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 03:09:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:24,383 INFO L93 Difference]: Finished difference Result 343 states and 728 transitions. [2021-06-05 03:09:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:09:24,384 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 03:09:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:24,385 INFO L225 Difference]: With dead ends: 343 [2021-06-05 03:09:24,385 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 03:09:24,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:09:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 03:09:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 219. [2021-06-05 03:09:24,391 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 03:09:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 504 transitions. [2021-06-05 03:09:24,392 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 504 transitions. Word has length 18 [2021-06-05 03:09:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:24,392 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 504 transitions. [2021-06-05 03:09:24,392 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 03:09:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 504 transitions. [2021-06-05 03:09:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:09:24,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:24,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:24,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:24,609 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash -779503072, now seen corresponding path program 15 times [2021-06-05 03:09:24,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:24,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042181995] [2021-06-05 03:09:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:24,646 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 03:09:24,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:24,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042181995] [2021-06-05 03:09:24,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042181995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:24,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002783053] [2021-06-05 03:09:24,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:24,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:09:24,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:24,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:09:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:24,720 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 03:09:24,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002783053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:24,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:24,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 03:09:24,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148322206] [2021-06-05 03:09:24,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:09:24,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:09:24,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:24,722 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 03:09:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:24,765 INFO L93 Difference]: Finished difference Result 322 states and 711 transitions. [2021-06-05 03:09:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:09:24,766 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 03:09:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:24,768 INFO L225 Difference]: With dead ends: 322 [2021-06-05 03:09:24,768 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 03:09:24,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:09:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 03:09:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-06-05 03:09:24,774 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 03:09:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 598 transitions. [2021-06-05 03:09:24,775 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 598 transitions. Word has length 18 [2021-06-05 03:09:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:24,775 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 598 transitions. [2021-06-05 03:09:24,775 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 03:09:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 598 transitions. [2021-06-05 03:09:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:24,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:24,776 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:24,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:24,993 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash -853552034, now seen corresponding path program 16 times [2021-06-05 03:09:24,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:24,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421221773] [2021-06-05 03:09:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:25,033 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 03:09:25,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:25,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421221773] [2021-06-05 03:09:25,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421221773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:25,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802104702] [2021-06-05 03:09:25,034 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 03:09:25,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:09:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:25,118 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 03:09:25,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802104702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:25,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:25,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:09:25,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332263894] [2021-06-05 03:09:25,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:09:25,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:09:25,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:25,120 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 03:09:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:25,239 INFO L93 Difference]: Finished difference Result 402 states and 849 transitions. [2021-06-05 03:09:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:25,240 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 03:09:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:25,241 INFO L225 Difference]: With dead ends: 402 [2021-06-05 03:09:25,241 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 03:09:25,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:09:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 03:09:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 241. [2021-06-05 03:09:25,248 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 03:09:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 558 transitions. [2021-06-05 03:09:25,249 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 558 transitions. Word has length 20 [2021-06-05 03:09:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:25,249 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 558 transitions. [2021-06-05 03:09:25,249 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 03:09:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 558 transitions. [2021-06-05 03:09:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:25,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:25,250 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:25,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:25,465 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1535686302, now seen corresponding path program 17 times [2021-06-05 03:09:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:25,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612168038] [2021-06-05 03:09:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:25,514 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 03:09:25,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:25,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612168038] [2021-06-05 03:09:25,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612168038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:25,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636623070] [2021-06-05 03:09:25,515 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 03:09:25,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:09:25,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:25,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:25,609 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 03:09:25,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636623070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:25,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:25,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:09:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858720435] [2021-06-05 03:09:25,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:09:25,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:09:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:25,610 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 03:09:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:25,718 INFO L93 Difference]: Finished difference Result 375 states and 801 transitions. [2021-06-05 03:09:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:25,718 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 03:09:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:25,720 INFO L225 Difference]: With dead ends: 375 [2021-06-05 03:09:25,720 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 03:09:25,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:09:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 03:09:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-06-05 03:09:25,727 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 03:09:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 616 transitions. [2021-06-05 03:09:25,728 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 616 transitions. Word has length 20 [2021-06-05 03:09:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:25,728 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 616 transitions. [2021-06-05 03:09:25,728 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 03:09:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 616 transitions. [2021-06-05 03:09:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:25,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:25,729 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:25,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 03:09:25,952 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1142582700, now seen corresponding path program 18 times [2021-06-05 03:09:25,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:25,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915802177] [2021-06-05 03:09:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:25,981 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 03:09:25,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:25,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915802177] [2021-06-05 03:09:25,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915802177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:25,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314014796] [2021-06-05 03:09:25,982 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 03:09:26,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:09:26,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:26,044 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 03:09:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314014796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:26,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:26,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:26,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093481835] [2021-06-05 03:09:26,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:26,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:26,046 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 03:09:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:26,123 INFO L93 Difference]: Finished difference Result 358 states and 767 transitions. [2021-06-05 03:09:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:26,123 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 03:09:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:26,125 INFO L225 Difference]: With dead ends: 358 [2021-06-05 03:09:26,125 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 03:09:26,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 03:09:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2021-06-05 03:09:26,131 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 03:09:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 563 transitions. [2021-06-05 03:09:26,132 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 563 transitions. Word has length 20 [2021-06-05 03:09:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:26,133 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 563 transitions. [2021-06-05 03:09:26,133 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 03:09:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 563 transitions. [2021-06-05 03:09:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:26,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:26,134 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:26,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 03:09:26,358 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:26,358 INFO L82 PathProgramCache]: Analyzing trace with hash 653699470, now seen corresponding path program 19 times [2021-06-05 03:09:26,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:26,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531431327] [2021-06-05 03:09:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:26,388 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 03:09:26,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:26,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531431327] [2021-06-05 03:09:26,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531431327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:26,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407174608] [2021-06-05 03:09:26,388 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 03:09:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:26,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:26,449 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 03:09:26,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407174608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:26,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:26,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336048719] [2021-06-05 03:09:26,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:26,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:26,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:26,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:26,451 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 03:09:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:26,526 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-06-05 03:09:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:09:26,527 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 03:09:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:26,528 INFO L225 Difference]: With dead ends: 305 [2021-06-05 03:09:26,528 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 03:09:26,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:09:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 03:09:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 250. [2021-06-05 03:09:26,534 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 03:09:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 562 transitions. [2021-06-05 03:09:26,535 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 562 transitions. Word has length 20 [2021-06-05 03:09:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:26,535 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 562 transitions. [2021-06-05 03:09:26,535 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 03:09:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 562 transitions. [2021-06-05 03:09:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:26,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:26,537 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:26,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 03:09:26,760 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash -898528034, now seen corresponding path program 20 times [2021-06-05 03:09:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:26,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339553539] [2021-06-05 03:09:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:26,789 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 03:09:26,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:26,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339553539] [2021-06-05 03:09:26,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339553539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:26,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833167339] [2021-06-05 03:09:26,790 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 03:09:26,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:09:26,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:26,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:26,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:26,854 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 03:09:26,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833167339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:26,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:26,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227595858] [2021-06-05 03:09:26,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:26,855 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 03:09:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:26,931 INFO L93 Difference]: Finished difference Result 417 states and 879 transitions. [2021-06-05 03:09:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:26,931 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 03:09:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:26,933 INFO L225 Difference]: With dead ends: 417 [2021-06-05 03:09:26,933 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 03:09:26,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 03:09:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 268. [2021-06-05 03:09:26,939 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 03:09:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 611 transitions. [2021-06-05 03:09:26,940 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 611 transitions. Word has length 20 [2021-06-05 03:09:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:26,940 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 611 transitions. [2021-06-05 03:09:26,940 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 03:09:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 611 transitions. [2021-06-05 03:09:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:26,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:26,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:27,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 03:09:27,165 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1119101922, now seen corresponding path program 21 times [2021-06-05 03:09:27,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:27,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833106659] [2021-06-05 03:09:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:27,193 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 03:09:27,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:27,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833106659] [2021-06-05 03:09:27,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833106659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:27,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767582317] [2021-06-05 03:09:27,194 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 03:09:27,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:09:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:27,295 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 03:09:27,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767582317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:27,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:27,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 03:09:27,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418637767] [2021-06-05 03:09:27,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:09:27,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:09:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:09:27,296 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 03:09:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:27,615 INFO L93 Difference]: Finished difference Result 393 states and 847 transitions. [2021-06-05 03:09:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:09:27,616 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 03:09:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:27,617 INFO L225 Difference]: With dead ends: 393 [2021-06-05 03:09:27,617 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 03:09:27,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:09:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 03:09:27,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 237. [2021-06-05 03:09:27,628 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 03:09:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 548 transitions. [2021-06-05 03:09:27,629 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 548 transitions. Word has length 20 [2021-06-05 03:09:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:27,630 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 548 transitions. [2021-06-05 03:09:27,631 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 03:09:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 548 transitions. [2021-06-05 03:09:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:27,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:27,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:27,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 03:09:27,855 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash 284729366, now seen corresponding path program 22 times [2021-06-05 03:09:27,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:27,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264610577] [2021-06-05 03:09:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:27,891 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 03:09:27,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264610577] [2021-06-05 03:09:27,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264610577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26702881] [2021-06-05 03:09:27,892 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 03:09:27,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:09:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:28,015 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 03:09:28,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26702881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:28,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:28,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:28,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82440716] [2021-06-05 03:09:28,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:28,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:28,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:28,017 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 03:09:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:28,142 INFO L93 Difference]: Finished difference Result 329 states and 695 transitions. [2021-06-05 03:09:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:09:28,143 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 03:09:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:28,144 INFO L225 Difference]: With dead ends: 329 [2021-06-05 03:09:28,144 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 03:09:28,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:09:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 03:09:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 211. [2021-06-05 03:09:28,149 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 03:09:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 484 transitions. [2021-06-05 03:09:28,150 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 484 transitions. Word has length 20 [2021-06-05 03:09:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:28,150 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 484 transitions. [2021-06-05 03:09:28,150 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 03:09:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 484 transitions. [2021-06-05 03:09:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:28,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:28,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:28,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:28,384 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash -299472784, now seen corresponding path program 23 times [2021-06-05 03:09:28,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:28,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860657266] [2021-06-05 03:09:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:28,440 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 03:09:28,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860657266] [2021-06-05 03:09:28,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860657266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540249146] [2021-06-05 03:09:28,440 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 03:09:28,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:09:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:28,518 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 03:09:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540249146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:28,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:28,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:09:28,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27658977] [2021-06-05 03:09:28,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:28,520 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 03:09:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:28,611 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2021-06-05 03:09:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:28,612 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 03:09:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:28,613 INFO L225 Difference]: With dead ends: 303 [2021-06-05 03:09:28,613 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 03:09:28,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:09:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 03:09:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2021-06-05 03:09:28,618 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 03:09:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-05 03:09:28,618 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-05 03:09:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:28,618 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-05 03:09:28,618 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 03:09:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-05 03:09:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:28,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:28,619 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:28,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:09:28,833 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 822584944, now seen corresponding path program 24 times [2021-06-05 03:09:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:28,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967866885] [2021-06-05 03:09:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:28,863 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 03:09:28,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:28,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967866885] [2021-06-05 03:09:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967866885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:28,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542574629] [2021-06-05 03:09:28,863 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 03:09:28,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:09:28,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:28,917 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 03:09:28,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542574629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:28,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:09:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019971097] [2021-06-05 03:09:28,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:28,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:28,918 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 03:09:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:29,004 INFO L93 Difference]: Finished difference Result 257 states and 522 transitions. [2021-06-05 03:09:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:29,004 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 03:09:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:29,005 INFO L225 Difference]: With dead ends: 257 [2021-06-05 03:09:29,006 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 03:09:29,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:09:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 03:09:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-06-05 03:09:29,009 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 03:09:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 419 transitions. [2021-06-05 03:09:29,010 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 419 transitions. Word has length 20 [2021-06-05 03:09:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:29,010 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 419 transitions. [2021-06-05 03:09:29,010 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 03:09:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 419 transitions. [2021-06-05 03:09:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:29,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:29,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:29,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:29,225 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash 618096624, now seen corresponding path program 25 times [2021-06-05 03:09:29,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:29,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512820881] [2021-06-05 03:09:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:29,263 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 03:09:29,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512820881] [2021-06-05 03:09:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512820881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617796332] [2021-06-05 03:09:29,263 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 03:09:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:29,333 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 03:09:29,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617796332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:29,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:29,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:09:29,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177974285] [2021-06-05 03:09:29,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:29,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:29,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:29,336 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 03:09:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:29,429 INFO L93 Difference]: Finished difference Result 233 states and 480 transitions. [2021-06-05 03:09:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:29,430 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 03:09:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:29,430 INFO L225 Difference]: With dead ends: 233 [2021-06-05 03:09:29,431 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 03:09:29,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:09:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 03:09:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2021-06-05 03:09:29,436 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 03:09:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 412 transitions. [2021-06-05 03:09:29,437 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 412 transitions. Word has length 20 [2021-06-05 03:09:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:29,437 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 412 transitions. [2021-06-05 03:09:29,437 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 03:09:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 412 transitions. [2021-06-05 03:09:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:29,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:29,437 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:29,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 03:09:29,660 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 469387998, now seen corresponding path program 26 times [2021-06-05 03:09:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:29,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012394672] [2021-06-05 03:09:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:29,686 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 03:09:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012394672] [2021-06-05 03:09:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012394672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328762025] [2021-06-05 03:09:29,686 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 03:09:29,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:09:29,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:29,773 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 03:09:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328762025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:29,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:29,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:29,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221858865] [2021-06-05 03:09:29,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:29,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:29,775 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 03:09:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:29,850 INFO L93 Difference]: Finished difference Result 289 states and 591 transitions. [2021-06-05 03:09:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:29,851 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 03:09:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:29,852 INFO L225 Difference]: With dead ends: 289 [2021-06-05 03:09:29,852 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 03:09:29,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 03:09:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-06-05 03:09:29,856 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 03:09:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 448 transitions. [2021-06-05 03:09:29,857 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 448 transitions. Word has length 20 [2021-06-05 03:09:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:29,857 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 448 transitions. [2021-06-05 03:09:29,857 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 03:09:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 448 transitions. [2021-06-05 03:09:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:29,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:29,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:30,081 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2141528628, now seen corresponding path program 27 times [2021-06-05 03:09:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861735911] [2021-06-05 03:09:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:30,108 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 03:09:30,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:30,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861735911] [2021-06-05 03:09:30,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861735911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:30,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131300069] [2021-06-05 03:09:30,109 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 03:09:30,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:09:30,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:30,185 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 03:09:30,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131300069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:30,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:30,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:30,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344995788] [2021-06-05 03:09:30,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:30,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:30,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:30,186 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 03:09:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:30,260 INFO L93 Difference]: Finished difference Result 308 states and 651 transitions. [2021-06-05 03:09:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:30,260 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 03:09:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:30,262 INFO L225 Difference]: With dead ends: 308 [2021-06-05 03:09:30,262 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 03:09:30,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 03:09:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 218. [2021-06-05 03:09:30,267 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 03:09:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 494 transitions. [2021-06-05 03:09:30,267 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 494 transitions. Word has length 20 [2021-06-05 03:09:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:30,268 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 494 transitions. [2021-06-05 03:09:30,268 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 03:09:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 494 transitions. [2021-06-05 03:09:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:30,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:30,268 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:30,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 03:09:30,485 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1652645398, now seen corresponding path program 28 times [2021-06-05 03:09:30,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:30,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160240318] [2021-06-05 03:09:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:30,511 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 03:09:30,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:30,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160240318] [2021-06-05 03:09:30,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160240318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:30,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456343804] [2021-06-05 03:09:30,512 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:30,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:09:30,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:30,558 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 03:09:30,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456343804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:30,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:30,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:09:30,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359312169] [2021-06-05 03:09:30,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:09:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:30,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:09:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:09:30,560 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 03:09:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:30,625 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2021-06-05 03:09:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:09:30,626 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 03:09:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:30,627 INFO L225 Difference]: With dead ends: 302 [2021-06-05 03:09:30,627 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 03:09:30,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:09:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 03:09:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 218. [2021-06-05 03:09:30,632 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 03:09:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-06-05 03:09:30,632 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 20 [2021-06-05 03:09:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:30,632 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-06-05 03:09:30,632 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 03:09:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-06-05 03:09:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:30,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:30,633 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:30,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:30,849 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443248, now seen corresponding path program 29 times [2021-06-05 03:09:30,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:30,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243579539] [2021-06-05 03:09:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:30,879 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 03:09:30,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:30,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243579539] [2021-06-05 03:09:30,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243579539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:30,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227593643] [2021-06-05 03:09:30,879 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 03:09:30,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:09:30,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:30,958 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 03:09:30,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227593643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:30,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:30,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:09:30,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750125354] [2021-06-05 03:09:30,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:30,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:30,959 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 03:09:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:31,066 INFO L93 Difference]: Finished difference Result 318 states and 670 transitions. [2021-06-05 03:09:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:31,066 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 03:09:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:31,068 INFO L225 Difference]: With dead ends: 318 [2021-06-05 03:09:31,068 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 03:09:31,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:09:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 03:09:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-05 03:09:31,072 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 03:09:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 501 transitions. [2021-06-05 03:09:31,072 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 501 transitions. Word has length 20 [2021-06-05 03:09:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:31,073 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 501 transitions. [2021-06-05 03:09:31,073 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 03:09:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 501 transitions. [2021-06-05 03:09:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:31,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:31,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:31,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 03:09:31,289 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2104466320, now seen corresponding path program 30 times [2021-06-05 03:09:31,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182038516] [2021-06-05 03:09:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:31,316 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 03:09:31,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:31,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182038516] [2021-06-05 03:09:31,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182038516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:31,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588803849] [2021-06-05 03:09:31,317 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 03:09:31,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:09:31,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:31,379 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 03:09:31,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588803849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:31,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:31,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:09:31,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902070133] [2021-06-05 03:09:31,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:31,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:31,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:09:31,381 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 03:09:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:31,453 INFO L93 Difference]: Finished difference Result 327 states and 677 transitions. [2021-06-05 03:09:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:31,453 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 03:09:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:31,454 INFO L225 Difference]: With dead ends: 327 [2021-06-05 03:09:31,454 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 03:09:31,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:09:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 03:09:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-05 03:09:31,458 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 03:09:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 499 transitions. [2021-06-05 03:09:31,459 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 499 transitions. Word has length 20 [2021-06-05 03:09:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:31,459 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 499 transitions. [2021-06-05 03:09:31,459 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 03:09:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 499 transitions. [2021-06-05 03:09:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:31,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:31,460 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:31,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:31,673 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1481240012, now seen corresponding path program 31 times [2021-06-05 03:09:31,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:31,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930965522] [2021-06-05 03:09:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:31,711 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 03:09:31,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:31,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930965522] [2021-06-05 03:09:31,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930965522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:31,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523755436] [2021-06-05 03:09:31,712 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 03:09:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:31,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:31,784 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 03:09:31,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523755436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:31,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:31,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:09:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291506252] [2021-06-05 03:09:31,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:09:31,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:09:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:31,787 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 03:09:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:31,920 INFO L93 Difference]: Finished difference Result 300 states and 625 transitions. [2021-06-05 03:09:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:31,921 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 03:09:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:31,922 INFO L225 Difference]: With dead ends: 300 [2021-06-05 03:09:31,922 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 03:09:31,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:09:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 03:09:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 206. [2021-06-05 03:09:31,926 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 03:09:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 462 transitions. [2021-06-05 03:09:31,927 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 462 transitions. Word has length 20 [2021-06-05 03:09:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:31,927 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 462 transitions. [2021-06-05 03:09:31,927 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 03:09:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 462 transitions. [2021-06-05 03:09:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:09:31,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:31,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:32,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 03:09:32,146 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -33586060, now seen corresponding path program 32 times [2021-06-05 03:09:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:32,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956978602] [2021-06-05 03:09:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:32,176 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 03:09:32,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956978602] [2021-06-05 03:09:32,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956978602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111318530] [2021-06-05 03:09:32,176 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 03:09:32,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:09:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:32,237 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 03:09:32,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111318530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:32,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:32,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:09:32,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782647068] [2021-06-05 03:09:32,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:09:32,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:09:32,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:09:32,238 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 03:09:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:32,333 INFO L93 Difference]: Finished difference Result 296 states and 607 transitions. [2021-06-05 03:09:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:09:32,334 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 03:09:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:32,335 INFO L225 Difference]: With dead ends: 296 [2021-06-05 03:09:32,335 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 03:09:32,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:09:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 03:09:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-06-05 03:09:32,339 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 03:09:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 473 transitions. [2021-06-05 03:09:32,340 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 473 transitions. Word has length 20 [2021-06-05 03:09:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:32,340 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 473 transitions. [2021-06-05 03:09:32,340 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 03:09:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 473 transitions. [2021-06-05 03:09:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:09:32,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:32,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 03:09:32,564 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1571256086, now seen corresponding path program 33 times [2021-06-05 03:09:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100098853] [2021-06-05 03:09:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:32,605 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 03:09:32,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100098853] [2021-06-05 03:09:32,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100098853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185423066] [2021-06-05 03:09:32,605 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 03:09:32,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:09:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:32,717 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 03:09:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185423066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:32,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:09:32,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-05 03:09:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028281675] [2021-06-05 03:09:32,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:32,719 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 03:09:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:32,794 INFO L93 Difference]: Finished difference Result 239 states and 520 transitions. [2021-06-05 03:09:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:32,794 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 03:09:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:32,795 INFO L225 Difference]: With dead ends: 239 [2021-06-05 03:09:32,795 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 03:09:32,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:09:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 03:09:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2021-06-05 03:09:32,799 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 03:09:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 456 transitions. [2021-06-05 03:09:32,799 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 456 transitions. Word has length 22 [2021-06-05 03:09:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:32,799 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 456 transitions. [2021-06-05 03:09:32,799 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 03:09:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 456 transitions. [2021-06-05 03:09:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:09:32,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:32,800 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:33,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 03:09:33,022 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 792994068, now seen corresponding path program 34 times [2021-06-05 03:09:33,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:33,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032000608] [2021-06-05 03:09:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:33,060 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 03:09:33,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:33,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032000608] [2021-06-05 03:09:33,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032000608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:33,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872759013] [2021-06-05 03:09:33,061 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) [2021-06-05 03:09:33,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:09:33,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:09:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:33,125 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 03:09:33,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872759013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:33,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:33,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:09:33,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613737991] [2021-06-05 03:09:33,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:33,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:33,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:33,127 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 03:09:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:33,191 INFO L93 Difference]: Finished difference Result 322 states and 668 transitions. [2021-06-05 03:09:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:09:33,192 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 03:09:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:33,193 INFO L225 Difference]: With dead ends: 322 [2021-06-05 03:09:33,193 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 03:09:33,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 03:09:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2021-06-05 03:09:33,198 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 03:09:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 539 transitions. [2021-06-05 03:09:33,198 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 539 transitions. Word has length 22 [2021-06-05 03:09:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:33,199 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 539 transitions. [2021-06-05 03:09:33,199 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 03:09:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 539 transitions. [2021-06-05 03:09:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:09:33,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:33,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 03:09:33,417 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1965218720, now seen corresponding path program 35 times [2021-06-05 03:09:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455929058] [2021-06-05 03:09:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:33,458 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 03:09:33,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455929058] [2021-06-05 03:09:33,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455929058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425559250] [2021-06-05 03:09:33,459 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 03:09:33,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:09:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:09:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:33,538 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 03:09:33,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425559250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:33,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:33,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:09:33,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926006522] [2021-06-05 03:09:33,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:33,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:33,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:33,539 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 03:09:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:33,602 INFO L93 Difference]: Finished difference Result 375 states and 800 transitions. [2021-06-05 03:09:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:09:33,602 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 03:09:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:33,604 INFO L225 Difference]: With dead ends: 375 [2021-06-05 03:09:33,604 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 03:09:33,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 03:09:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 294. [2021-06-05 03:09:33,609 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 03:09:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 664 transitions. [2021-06-05 03:09:33,609 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 664 transitions. Word has length 22 [2021-06-05 03:09:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:33,609 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 664 transitions. [2021-06-05 03:09:33,609 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 03:09:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 664 transitions. [2021-06-05 03:09:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:09:33,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:33,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:33,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:09:33,833 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 116908384, now seen corresponding path program 36 times [2021-06-05 03:09:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:33,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107754466] [2021-06-05 03:09:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:33,872 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 03:09:33,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:33,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107754466] [2021-06-05 03:09:33,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107754466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:33,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605501767] [2021-06-05 03:09:33,873 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 03:09:33,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:09:33,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:33,997 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 03:09:33,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605501767] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:33,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:09:33,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-05 03:09:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652642997] [2021-06-05 03:09:33,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:09:33,998 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 03:09:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:34,080 INFO L93 Difference]: Finished difference Result 320 states and 710 transitions. [2021-06-05 03:09:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:34,081 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 03:09:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:34,082 INFO L225 Difference]: With dead ends: 320 [2021-06-05 03:09:34,082 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 03:09:34,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:09:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 03:09:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 291. [2021-06-05 03:09:34,086 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 03:09:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 636 transitions. [2021-06-05 03:09:34,087 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 636 transitions. Word has length 22 [2021-06-05 03:09:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:34,087 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 636 transitions. [2021-06-05 03:09:34,087 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 03:09:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 636 transitions. [2021-06-05 03:09:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:09:34,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:34,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:34,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:09:34,304 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash -694299372, now seen corresponding path program 37 times [2021-06-05 03:09:34,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:34,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779999514] [2021-06-05 03:09:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:34,349 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 03:09:34,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:34,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779999514] [2021-06-05 03:09:34,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779999514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:34,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350133475] [2021-06-05 03:09:34,349 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 03:09:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:09:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:34,428 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 03:09:34,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350133475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:34,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:34,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:09:34,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072973690] [2021-06-05 03:09:34,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:09:34,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:09:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:09:34,430 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 03:09:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:34,483 INFO L93 Difference]: Finished difference Result 425 states and 900 transitions. [2021-06-05 03:09:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:09:34,484 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 03:09:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:34,485 INFO L225 Difference]: With dead ends: 425 [2021-06-05 03:09:34,485 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 03:09:34,485 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 03:09:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 03:09:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-05 03:09:34,491 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 03:09:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 777 transitions. [2021-06-05 03:09:34,491 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 777 transitions. Word has length 22 [2021-06-05 03:09:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:34,492 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 777 transitions. [2021-06-05 03:09:34,492 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 03:09:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 777 transitions. [2021-06-05 03:09:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:09:34,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:34,493 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:34,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 03:09:34,706 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1224912364, now seen corresponding path program 38 times [2021-06-05 03:09:34,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:34,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305587478] [2021-06-05 03:09:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:34,744 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 03:09:34,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305587478] [2021-06-05 03:09:34,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305587478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207544289] [2021-06-05 03:09:34,745 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 03:09:34,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:09:34,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:09:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:34,891 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 03:09:34,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207544289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:34,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:09:34,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2021-06-05 03:09:34,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255837700] [2021-06-05 03:09:34,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:09:34,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:09:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:09:34,892 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 03:09:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:35,119 INFO L93 Difference]: Finished difference Result 623 states and 1302 transitions. [2021-06-05 03:09:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:09:35,120 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 03:09:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:35,122 INFO L225 Difference]: With dead ends: 623 [2021-06-05 03:09:35,122 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 03:09:35,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:09:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 03:09:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 410. [2021-06-05 03:09:35,129 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 03:09:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 927 transitions. [2021-06-05 03:09:35,130 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 927 transitions. Word has length 22 [2021-06-05 03:09:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:35,130 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 927 transitions. [2021-06-05 03:09:35,130 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 03:09:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 927 transitions. [2021-06-05 03:09:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:09:35,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:09:35,131 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:09:35,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:35,354 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:09:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:09:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -972138362, now seen corresponding path program 39 times [2021-06-05 03:09:35,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:09:35,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518434094] [2021-06-05 03:09:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:09:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:09:35,402 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 03:09:35,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:09:35,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518434094] [2021-06-05 03:09:35,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518434094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:09:35,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210620558] [2021-06-05 03:09:35,403 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 03:09:35,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:09:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:09:35,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:09:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:09:35,515 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 03:09:35,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210620558] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:09:35,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:09:35,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-06-05 03:09:35,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610913461] [2021-06-05 03:09:35,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:09:35,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:09:35,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:09:35,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:09:35,516 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 03:09:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:09:35,627 INFO L93 Difference]: Finished difference Result 428 states and 965 transitions. [2021-06-05 03:09:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:09:35,628 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 03:09:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:09:35,628 INFO L225 Difference]: With dead ends: 428 [2021-06-05 03:09:35,628 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 03:09:35,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:09:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 03:09:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 03:09:35,629 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 03:09:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 03:09:35,630 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-05 03:09:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:09:35,631 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 03:09:35,631 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 03:09:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 03:09:35,631 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 03:09:35,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:09:35,857 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 03:09:35,859 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:09:35 BasicIcfg [2021-06-05 03:09:35,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:09:35,859 INFO L168 Benchmark]: Toolchain (without parser) took 18297.52 ms. Allocated memory is still 362.8 MB. Free memory was 342.6 MB in the beginning and 334.0 MB in the end (delta: 8.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.0 GB. [2021-06-05 03:09:35,859 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 362.8 MB. Free memory was 343.7 MB in the beginning and 343.6 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:09:35,859 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.58 ms. Allocated memory is still 362.8 MB. Free memory was 342.5 MB in the beginning and 341.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:09:35,859 INFO L168 Benchmark]: Boogie Preprocessor took 13.64 ms. Allocated memory is still 362.8 MB. Free memory was 341.1 MB in the beginning and 340.2 MB in the end (delta: 940.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:09:35,860 INFO L168 Benchmark]: RCFGBuilder took 231.17 ms. Allocated memory is still 362.8 MB. Free memory was 340.2 MB in the beginning and 330.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 03:09:35,860 INFO L168 Benchmark]: TraceAbstraction took 18022.80 ms. Allocated memory is still 362.8 MB. Free memory was 330.1 MB in the beginning and 334.0 MB in the end (delta: -3.9 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:09:35,860 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 0.16 ms. Allocated memory is still 362.8 MB. Free memory was 343.7 MB in the beginning and 343.6 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.58 ms. Allocated memory is still 362.8 MB. Free memory was 342.5 MB in the beginning and 341.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.64 ms. Allocated memory is still 362.8 MB. Free memory was 341.1 MB in the beginning and 340.2 MB in the end (delta: 940.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 231.17 ms. Allocated memory is still 362.8 MB. Free memory was 340.2 MB in the beginning and 330.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 18022.80 ms. Allocated memory is still 362.8 MB. Free memory was 330.1 MB in the beginning and 334.0 MB in the end (delta: -3.9 MB). There was no memory consumed. 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: 17898.2ms, OverallIterations: 43, TraceHistogramMax: 4, EmptinessCheckTime: 39.9ms, AutomataDifference: 3856.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 48.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 851 SDtfs, 2233 SDslu, 2558 SDs, 0 SdLazy, 3384 SolverSat, 492 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1787.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1102 GetRequests, 676 SyntacticMatches, 60 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2391.4ms 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: 297.4ms AutomataMinimizationTime, 43 MinimizatonAttempts, 2839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 86.2ms SsaConstructionTime, 329.4ms SatisfiabilityAnalysisTime, 3676.9ms 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...