/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:51:12,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:51:12,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:51:12,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 18:51:13,012 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 [2021-08-12 18:51:13,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:51:13,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:51:13,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:51:13,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:51:13,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:51:13,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:51:13,100 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:51:13,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:51:13,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:51:13,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:51:13,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:51:13,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:51:13,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:51:13,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:51:13,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:51:13,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:51:13,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:51:13,103 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:51:13,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:51:13,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:51:13,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:51:13,401 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:51:13,403 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:51:13,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-08-12 18:51:13,413 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-08-12 18:51:13,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:51:13,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:51:13,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:51:13,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:51:13,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:51:13,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:51:13,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:51:13,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:51:13,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:51:13,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/1) ... [2021-08-12 18:51:13,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:51:13,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:51:13,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:51:13,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:51:13,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (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 [2021-08-12 18:51:13,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 18:51:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 18:51:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 18:51:13,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 18:51:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 18:51:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 18:51:13,555 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:51:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:51:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:51:13,556 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:51:13,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:51:13,726 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 18:51:13,727 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:51:13 BoogieIcfgContainer [2021-08-12 18:51:13,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:51:13,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:51:13,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:51:13,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:51:13,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:13" (1/2) ... [2021-08-12 18:51:13,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a6538 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:51:13, skipping insertion in model container [2021-08-12 18:51:13,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:51:13" (2/2) ... [2021-08-12 18:51:13,732 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-08-12 18:51:13,736 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:51:13,736 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:51:13,737 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:51:13,775 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 18:51:13,797 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 18:51:13,830 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:51:13,831 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:51:13,831 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:51:13,831 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:51:13,831 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:51:13,831 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:51:13,831 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:51:13,831 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:51:13,837 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-08-12 18:51:13,863 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:51:13,869 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:13,870 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:13,870 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1540416471, now seen corresponding path program 1 times [2021-08-12 18:51:13,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:13,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421103664] [2021-08-12 18:51:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:14,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:14,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421103664] [2021-08-12 18:51:14,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421103664] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:14,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:14,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 18:51:14,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463942656] [2021-08-12 18:51:14,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:51:14,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:51:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:51:14,039 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 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, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:14,094 INFO L93 Difference]: Finished difference Result 106 states and 231 transitions. [2021-08-12 18:51:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:51:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 18:51:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:14,104 INFO L225 Difference]: With dead ends: 106 [2021-08-12 18:51:14,104 INFO L226 Difference]: Without dead ends: 95 [2021-08-12 18:51:14,106 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:51:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-12 18:51:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-08-12 18:51:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-08-12 18:51:14,142 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-08-12 18:51:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:14,142 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-08-12 18:51:14,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-08-12 18:51:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:51:14,143 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:14,143 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:51:14,144 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-08-12 18:51:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:14,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833427169] [2021-08-12 18:51:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:14,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833427169] [2021-08-12 18:51:14,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833427169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:14,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:14,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:51:14,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671368344] [2021-08-12 18:51:14,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:51:14,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:51:14,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:14,211 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:14,319 INFO L93 Difference]: Finished difference Result 183 states and 399 transitions. [2021-08-12 18:51:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 [2021-08-12 18:51:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:14,322 INFO L225 Difference]: With dead ends: 183 [2021-08-12 18:51:14,322 INFO L226 Difference]: Without dead ends: 160 [2021-08-12 18:51:14,322 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-12 18:51:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-08-12 18:51:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-08-12 18:51:14,333 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-08-12 18:51:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:14,334 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-08-12 18:51:14,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-08-12 18:51:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:51:14,335 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:14,335 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:14,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 18:51:14,335 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash 110711837, now seen corresponding path program 1 times [2021-08-12 18:51:14,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:14,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550884403] [2021-08-12 18:51:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:14,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:14,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550884403] [2021-08-12 18:51:14,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550884403] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:14,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:14,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:51:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300054554] [2021-08-12 18:51:14,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:51:14,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:51:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:14,380 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:14,444 INFO L93 Difference]: Finished difference Result 201 states and 445 transitions. [2021-08-12 18:51:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:51:14,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 [2021-08-12 18:51:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:14,446 INFO L225 Difference]: With dead ends: 201 [2021-08-12 18:51:14,446 INFO L226 Difference]: Without dead ends: 163 [2021-08-12 18:51:14,447 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-12 18:51:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2021-08-12 18:51:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 115 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2021-08-12 18:51:14,458 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 14 [2021-08-12 18:51:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:14,458 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2021-08-12 18:51:14,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2021-08-12 18:51:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:51:14,459 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:14,459 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:14,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 18:51:14,459 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 2 times [2021-08-12 18:51:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:14,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117784104] [2021-08-12 18:51:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:14,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:14,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117784104] [2021-08-12 18:51:14,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117784104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:14,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126413512] [2021-08-12 18:51:14,501 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 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 [2021-08-12 18:51:14,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:14,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:14,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 18:51:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:14,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126413512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:14,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:14,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-12 18:51:14,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028246158] [2021-08-12 18:51:14,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:51:14,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:14,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:51:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:14,632 INFO L87 Difference]: Start difference. First operand 116 states and 264 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:14,716 INFO L93 Difference]: Finished difference Result 165 states and 371 transitions. [2021-08-12 18:51:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 [2021-08-12 18:51:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:14,719 INFO L225 Difference]: With dead ends: 165 [2021-08-12 18:51:14,719 INFO L226 Difference]: Without dead ends: 141 [2021-08-12 18:51:14,720 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-12 18:51:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-08-12 18:51:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-08-12 18:51:14,734 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-08-12 18:51:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:14,734 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-08-12 18:51:14,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-08-12 18:51:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:51:14,735 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:14,735 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:14,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:14,959 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-08-12 18:51:14,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:14,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345013038] [2021-08-12 18:51:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:14,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:14,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345013038] [2021-08-12 18:51:14,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345013038] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:14,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:14,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:51:14,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152167972] [2021-08-12 18:51:14,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:51:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:51:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:14,991 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:15,032 INFO L93 Difference]: Finished difference Result 167 states and 370 transitions. [2021-08-12 18:51:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:51:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 [2021-08-12 18:51:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:15,033 INFO L225 Difference]: With dead ends: 167 [2021-08-12 18:51:15,033 INFO L226 Difference]: Without dead ends: 142 [2021-08-12 18:51:15,034 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-12 18:51:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-08-12 18:51:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-08-12 18:51:15,040 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-08-12 18:51:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:15,040 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-08-12 18:51:15,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) 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) [2021-08-12 18:51:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-08-12 18:51:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:51:15,041 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:15,041 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:15,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 18:51:15,041 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-08-12 18:51:15,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:15,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032157866] [2021-08-12 18:51:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:15,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:15,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032157866] [2021-08-12 18:51:15,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032157866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:15,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403307976] [2021-08-12 18:51:15,112 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 [2021-08-12 18:51:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403307976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:15,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-12 18:51:15,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396565547] [2021-08-12 18:51:15,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:15,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:15,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:15,212 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:15,300 INFO L93 Difference]: Finished difference Result 302 states and 677 transitions. [2021-08-12 18:51:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2021-08-12 18:51:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:15,302 INFO L225 Difference]: With dead ends: 302 [2021-08-12 18:51:15,302 INFO L226 Difference]: Without dead ends: 286 [2021-08-12 18:51:15,303 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-12 18:51:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-08-12 18:51:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-08-12 18:51:15,313 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-08-12 18:51:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:15,321 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-08-12 18:51:15,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-08-12 18:51:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:51:15,322 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:15,322 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:15,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:15,523 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-08-12 18:51:15,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:15,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20408935] [2021-08-12 18:51:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:15,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20408935] [2021-08-12 18:51:15,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20408935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748732786] [2021-08-12 18:51:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 18:51:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:15,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748732786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:15,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-12 18:51:15,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355903416] [2021-08-12 18:51:15,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:15,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:15,658 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:15,719 INFO L93 Difference]: Finished difference Result 348 states and 824 transitions. [2021-08-12 18:51:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:51:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 17 [2021-08-12 18:51:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:15,721 INFO L225 Difference]: With dead ends: 348 [2021-08-12 18:51:15,721 INFO L226 Difference]: Without dead ends: 248 [2021-08-12 18:51:15,721 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-12 18:51:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-08-12 18:51:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-08-12 18:51:15,731 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-08-12 18:51:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:15,731 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-08-12 18:51:15,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-08-12 18:51:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:51:15,732 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:15,732 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:15,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:15,949 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-08-12 18:51:15,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:15,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298269514] [2021-08-12 18:51:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:15,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:15,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298269514] [2021-08-12 18:51:15,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298269514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:15,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:15,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:51:15,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993779342] [2021-08-12 18:51:15,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:51:15,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:15,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:51:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:15,981 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-12 18:51:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:16,053 INFO L93 Difference]: Finished difference Result 313 states and 727 transitions. [2021-08-12 18:51:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:51:16,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 17 [2021-08-12 18:51:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:16,055 INFO L225 Difference]: With dead ends: 313 [2021-08-12 18:51:16,055 INFO L226 Difference]: Without dead ends: 304 [2021-08-12 18:51:16,055 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-12 18:51:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-08-12 18:51:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-08-12 18:51:16,066 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-08-12 18:51:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:16,066 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-08-12 18:51:16,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-12 18:51:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-08-12 18:51:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:51:16,068 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:16,068 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:16,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 18:51:16,068 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-08-12 18:51:16,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:16,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528059588] [2021-08-12 18:51:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:16,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:16,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528059588] [2021-08-12 18:51:16,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528059588] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:16,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:16,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:51:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505655204] [2021-08-12 18:51:16,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:51:16,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:51:16,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:16,102 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-12 18:51:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:16,159 INFO L93 Difference]: Finished difference Result 471 states and 1145 transitions. [2021-08-12 18:51:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:51:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 17 [2021-08-12 18:51:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:16,161 INFO L225 Difference]: With dead ends: 471 [2021-08-12 18:51:16,161 INFO L226 Difference]: Without dead ends: 208 [2021-08-12 18:51:16,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:51:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-12 18:51:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-08-12 18:51:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-08-12 18:51:16,174 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-08-12 18:51:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:16,174 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-08-12 18:51:16,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-12 18:51:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-08-12 18:51:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:51:16,175 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:16,175 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:16,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 18:51:16,176 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-08-12 18:51:16,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:16,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564816230] [2021-08-12 18:51:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:16,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564816230] [2021-08-12 18:51:16,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564816230] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:16,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:16,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:16,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802694056] [2021-08-12 18:51:16,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:16,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:16,228 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:51:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:16,274 INFO L93 Difference]: Finished difference Result 326 states and 792 transitions. [2021-08-12 18:51:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-08-12 18:51:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:16,277 INFO L225 Difference]: With dead ends: 326 [2021-08-12 18:51:16,277 INFO L226 Difference]: Without dead ends: 222 [2021-08-12 18:51:16,278 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-12 18:51:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-08-12 18:51:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-08-12 18:51:16,289 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-08-12 18:51:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:16,289 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-08-12 18:51:16,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:51:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-08-12 18:51:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:16,290 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:16,290 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:16,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 18:51:16,290 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:16,291 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-08-12 18:51:16,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:16,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712551429] [2021-08-12 18:51:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:16,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:16,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712551429] [2021-08-12 18:51:16,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712551429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:16,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014619583] [2021-08-12 18:51:16,362 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 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 [2021-08-12 18:51:16,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:51:16,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:16,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:16,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014619583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:16,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 18:51:16,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-08-12 18:51:16,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576711078] [2021-08-12 18:51:16,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:16,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:16,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:16,594 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:16,791 INFO L93 Difference]: Finished difference Result 423 states and 989 transitions. [2021-08-12 18:51:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:51:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:16,793 INFO L225 Difference]: With dead ends: 423 [2021-08-12 18:51:16,793 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 18:51:16,793 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:51:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 18:51:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-08-12 18:51:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-08-12 18:51:16,804 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-08-12 18:51:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:16,804 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-08-12 18:51:16,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-08-12 18:51:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:16,805 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:16,805 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:17,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:17,021 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-08-12 18:51:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:17,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546145071] [2021-08-12 18:51:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:17,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:17,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546145071] [2021-08-12 18:51:17,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546145071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:17,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781816638] [2021-08-12 18:51:17,066 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 18:51:17,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:51:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781816638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:17,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 18:51:17,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-08-12 18:51:17,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995605220] [2021-08-12 18:51:17,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:17,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:17,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:17,182 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:17,319 INFO L93 Difference]: Finished difference Result 613 states and 1436 transitions. [2021-08-12 18:51:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:17,322 INFO L225 Difference]: With dead ends: 613 [2021-08-12 18:51:17,322 INFO L226 Difference]: Without dead ends: 592 [2021-08-12 18:51:17,322 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-12 18:51:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-08-12 18:51:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-08-12 18:51:17,339 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-08-12 18:51:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:17,339 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-08-12 18:51:17,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-08-12 18:51:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:17,340 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:17,340 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:17,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 18:51:17,557 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-08-12 18:51:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:17,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411404958] [2021-08-12 18:51:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:17,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:17,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411404958] [2021-08-12 18:51:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411404958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:17,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386660671] [2021-08-12 18:51:17,594 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 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 [2021-08-12 18:51:17,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:51:17,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:17,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386660671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:17,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:17,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-08-12 18:51:17,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953922735] [2021-08-12 18:51:17,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:17,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:17,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:17,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:17,674 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:17,827 INFO L93 Difference]: Finished difference Result 781 states and 1903 transitions. [2021-08-12 18:51:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:17,831 INFO L225 Difference]: With dead ends: 781 [2021-08-12 18:51:17,831 INFO L226 Difference]: Without dead ends: 751 [2021-08-12 18:51:17,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-12 18:51:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-08-12 18:51:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-08-12 18:51:17,853 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-08-12 18:51:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:17,853 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-08-12 18:51:17,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-08-12 18:51:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:17,854 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:17,854 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:18,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:18,069 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-08-12 18:51:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:18,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195475050] [2021-08-12 18:51:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:18,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195475050] [2021-08-12 18:51:18,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195475050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218126533] [2021-08-12 18:51:18,103 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 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 [2021-08-12 18:51:18,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:51:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218126533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:18,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:18,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-08-12 18:51:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658475091] [2021-08-12 18:51:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:18,163 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:18,287 INFO L93 Difference]: Finished difference Result 983 states and 2526 transitions. [2021-08-12 18:51:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:51:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 [2021-08-12 18:51:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:18,292 INFO L225 Difference]: With dead ends: 983 [2021-08-12 18:51:18,292 INFO L226 Difference]: Without dead ends: 956 [2021-08-12 18:51:18,292 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-12 18:51:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-08-12 18:51:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-08-12 18:51:18,344 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-08-12 18:51:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:18,344 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-08-12 18:51:18,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-08-12 18:51:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:18,346 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:18,347 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:18,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:18,561 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-08-12 18:51:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:18,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601980985] [2021-08-12 18:51:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:18,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:18,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601980985] [2021-08-12 18:51:18,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601980985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:18,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381301222] [2021-08-12 18:51:18,598 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 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 [2021-08-12 18:51:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:18,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381301222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:18,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:18,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-08-12 18:51:18,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588649902] [2021-08-12 18:51:18,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:18,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:18,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:18,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:18,661 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:18,804 INFO L93 Difference]: Finished difference Result 985 states and 2529 transitions. [2021-08-12 18:51:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 [2021-08-12 18:51:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:18,809 INFO L225 Difference]: With dead ends: 985 [2021-08-12 18:51:18,809 INFO L226 Difference]: Without dead ends: 966 [2021-08-12 18:51:18,809 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-12 18:51:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-08-12 18:51:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-08-12 18:51:18,841 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-08-12 18:51:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:18,841 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-08-12 18:51:18,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-08-12 18:51:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:18,842 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:18,842 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:19,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 18:51:19,056 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-08-12 18:51:19,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:19,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984440019] [2021-08-12 18:51:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:19,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984440019] [2021-08-12 18:51:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984440019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063724357] [2021-08-12 18:51:19,079 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 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 [2021-08-12 18:51:19,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:19,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:19,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:19,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063724357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:19,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 18:51:19,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666739221] [2021-08-12 18:51:19,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:19,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:19,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:19,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:19,161 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:19,291 INFO L93 Difference]: Finished difference Result 891 states and 2357 transitions. [2021-08-12 18:51:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:19,296 INFO L225 Difference]: With dead ends: 891 [2021-08-12 18:51:19,296 INFO L226 Difference]: Without dead ends: 858 [2021-08-12 18:51:19,297 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-08-12 18:51:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-08-12 18:51:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-08-12 18:51:19,328 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-08-12 18:51:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:19,328 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-08-12 18:51:19,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-08-12 18:51:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:19,329 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:19,329 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:19,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:19,545 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-08-12 18:51:19,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:19,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201138590] [2021-08-12 18:51:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:19,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201138590] [2021-08-12 18:51:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201138590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174089660] [2021-08-12 18:51:19,573 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 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 [2021-08-12 18:51:19,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:51:19,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174089660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:19,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 18:51:19,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905010908] [2021-08-12 18:51:19,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:19,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:19,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:19,654 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:19,821 INFO L93 Difference]: Finished difference Result 1144 states and 2981 transitions. [2021-08-12 18:51:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:19,825 INFO L225 Difference]: With dead ends: 1144 [2021-08-12 18:51:19,826 INFO L226 Difference]: Without dead ends: 1114 [2021-08-12 18:51:19,826 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-12 18:51:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-08-12 18:51:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-08-12 18:51:19,861 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-08-12 18:51:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:19,861 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-08-12 18:51:19,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-08-12 18:51:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:19,862 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:19,862 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:20,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 18:51:20,077 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-08-12 18:51:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:20,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47686306] [2021-08-12 18:51:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:20,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47686306] [2021-08-12 18:51:20,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47686306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022976767] [2021-08-12 18:51:20,099 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 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 [2021-08-12 18:51:20,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:20,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022976767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:20,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:20,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-08-12 18:51:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788853354] [2021-08-12 18:51:20,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:20,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:20,190 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:20,348 INFO L93 Difference]: Finished difference Result 1409 states and 3832 transitions. [2021-08-12 18:51:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 [2021-08-12 18:51:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:20,355 INFO L225 Difference]: With dead ends: 1409 [2021-08-12 18:51:20,355 INFO L226 Difference]: Without dead ends: 1370 [2021-08-12 18:51:20,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-08-12 18:51:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-08-12 18:51:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-08-12 18:51:20,421 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-08-12 18:51:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:20,421 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-08-12 18:51:20,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-08-12 18:51:20,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:20,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:20,423 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:20,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 18:51:20,629 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-08-12 18:51:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726559092] [2021-08-12 18:51:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:20,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726559092] [2021-08-12 18:51:20,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726559092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468933634] [2021-08-12 18:51:20,654 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 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 [2021-08-12 18:51:20,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:51:20,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:20,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:20,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468933634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:20,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:20,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-08-12 18:51:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698240041] [2021-08-12 18:51:20,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:20,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:20,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:20,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:20,709 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:20,871 INFO L93 Difference]: Finished difference Result 1419 states and 3875 transitions. [2021-08-12 18:51:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 [2021-08-12 18:51:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:20,877 INFO L225 Difference]: With dead ends: 1419 [2021-08-12 18:51:20,877 INFO L226 Difference]: Without dead ends: 1400 [2021-08-12 18:51:20,878 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-08-12 18:51:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-08-12 18:51:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-08-12 18:51:20,922 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-08-12 18:51:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:20,922 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-08-12 18:51:20,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-08-12 18:51:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:20,925 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:20,925 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:21,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 18:51:21,142 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-08-12 18:51:21,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:21,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651805779] [2021-08-12 18:51:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:21,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651805779] [2021-08-12 18:51:21,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651805779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626761881] [2021-08-12 18:51:21,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 18:51:21,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:51:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626761881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:21,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:21,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 18:51:21,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402220065] [2021-08-12 18:51:21,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:21,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:21,242 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:21,395 INFO L93 Difference]: Finished difference Result 1515 states and 4040 transitions. [2021-08-12 18:51:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:21,402 INFO L225 Difference]: With dead ends: 1515 [2021-08-12 18:51:21,402 INFO L226 Difference]: Without dead ends: 1482 [2021-08-12 18:51:21,402 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-08-12 18:51:21,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-08-12 18:51:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-08-12 18:51:21,450 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-08-12 18:51:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:21,450 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-08-12 18:51:21,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-08-12 18:51:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:21,452 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:21,452 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:21,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:21,669 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:21,669 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-08-12 18:51:21,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:21,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267075423] [2021-08-12 18:51:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:21,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267075423] [2021-08-12 18:51:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267075423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704516015] [2021-08-12 18:51:21,703 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 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 [2021-08-12 18:51:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:21,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704516015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:21,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:21,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-08-12 18:51:21,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65760564] [2021-08-12 18:51:21,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:21,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:21,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:21,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:21,771 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 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) [2021-08-12 18:51:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:22,025 INFO L93 Difference]: Finished difference Result 1447 states and 3915 transitions. [2021-08-12 18:51:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:22,025 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 [2021-08-12 18:51:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:22,031 INFO L225 Difference]: With dead ends: 1447 [2021-08-12 18:51:22,031 INFO L226 Difference]: Without dead ends: 1426 [2021-08-12 18:51:22,032 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-08-12 18:51:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-08-12 18:51:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-08-12 18:51:22,077 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-08-12 18:51:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:22,077 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-08-12 18:51:22,077 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) [2021-08-12 18:51:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-08-12 18:51:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 18:51:22,079 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:22,079 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:22,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:22,298 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:22,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-08-12 18:51:22,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:22,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874484198] [2021-08-12 18:51:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:22,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:22,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874484198] [2021-08-12 18:51:22,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874484198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:22,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47485548] [2021-08-12 18:51:22,325 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 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 [2021-08-12 18:51:22,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:22,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:22,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47485548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:22,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:22,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:22,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872274880] [2021-08-12 18:51:22,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:22,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:22,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:22,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:22,388 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:22,555 INFO L93 Difference]: Finished difference Result 1426 states and 3808 transitions. [2021-08-12 18:51:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:51:22,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 18:51:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:22,560 INFO L225 Difference]: With dead ends: 1426 [2021-08-12 18:51:22,560 INFO L226 Difference]: Without dead ends: 1382 [2021-08-12 18:51:22,560 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-08-12 18:51:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-08-12 18:51:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-08-12 18:51:22,606 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-08-12 18:51:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:22,606 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-08-12 18:51:22,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-08-12 18:51:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:22,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:22,607 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:22,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 18:51:22,821 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-08-12 18:51:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:22,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974824928] [2021-08-12 18:51:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:22,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:22,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974824928] [2021-08-12 18:51:22,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974824928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:22,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291483001] [2021-08-12 18:51:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 18:51:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:22,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:22,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291483001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:22,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:22,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:51:22,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144793327] [2021-08-12 18:51:22,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:51:22,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:22,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:51:22,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:51:22,955 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-08-12 18:51:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:23,433 INFO L93 Difference]: Finished difference Result 2197 states and 6016 transitions. [2021-08-12 18:51:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:51:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 23 [2021-08-12 18:51:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:23,440 INFO L225 Difference]: With dead ends: 2197 [2021-08-12 18:51:23,440 INFO L226 Difference]: Without dead ends: 1620 [2021-08-12 18:51:23,441 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:51:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-08-12 18:51:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-08-12 18:51:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-08-12 18:51:23,493 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-08-12 18:51:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:23,493 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-08-12 18:51:23,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-08-12 18:51:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-08-12 18:51:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:23,495 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:23,495 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:23,721 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-08-12 18:51:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281535943] [2021-08-12 18:51:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:23,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281535943] [2021-08-12 18:51:23,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281535943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840745732] [2021-08-12 18:51:23,753 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 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 [2021-08-12 18:51:23,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:51:23,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:23,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:23,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840745732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:23,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:23,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 18:51:23,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575029046] [2021-08-12 18:51:23,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:23,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:23,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:23,828 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:24,049 INFO L93 Difference]: Finished difference Result 1905 states and 5029 transitions. [2021-08-12 18:51:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 18:51:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:24,058 INFO L225 Difference]: With dead ends: 1905 [2021-08-12 18:51:24,058 INFO L226 Difference]: Without dead ends: 1896 [2021-08-12 18:51:24,059 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-08-12 18:51:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-08-12 18:51:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-08-12 18:51:24,129 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-08-12 18:51:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:24,129 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-08-12 18:51:24,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-08-12 18:51:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:24,131 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:24,131 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:24,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 18:51:24,345 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-08-12 18:51:24,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:24,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387880428] [2021-08-12 18:51:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 18:51:24,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:24,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387880428] [2021-08-12 18:51:24,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387880428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:24,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034177463] [2021-08-12 18:51:24,375 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 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 [2021-08-12 18:51:24,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:24,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 18:51:24,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034177463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:24,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:24,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 18:51:24,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042062070] [2021-08-12 18:51:24,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:24,447 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2021-08-12 18:51:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:24,688 INFO L93 Difference]: Finished difference Result 2101 states and 5567 transitions. [2021-08-12 18:51:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 23 [2021-08-12 18:51:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:24,696 INFO L225 Difference]: With dead ends: 2101 [2021-08-12 18:51:24,696 INFO L226 Difference]: Without dead ends: 2092 [2021-08-12 18:51:24,696 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-08-12 18:51:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-08-12 18:51:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-08-12 18:51:24,781 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-08-12 18:51:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:24,781 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-08-12 18:51:24,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2021-08-12 18:51:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-08-12 18:51:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:24,784 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:24,784 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:25,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 18:51:25,002 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-08-12 18:51:25,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:25,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758818298] [2021-08-12 18:51:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:25,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:25,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758818298] [2021-08-12 18:51:25,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758818298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:25,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127758388] [2021-08-12 18:51:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-08-12 18:51:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127758388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:25,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:25,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:51:25,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517884290] [2021-08-12 18:51:25,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:25,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:25,151 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-08-12 18:51:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:25,445 INFO L93 Difference]: Finished difference Result 2848 states and 7647 transitions. [2021-08-12 18:51:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 23 [2021-08-12 18:51:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:25,449 INFO L225 Difference]: With dead ends: 2848 [2021-08-12 18:51:25,449 INFO L226 Difference]: Without dead ends: 1391 [2021-08-12 18:51:25,451 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-08-12 18:51:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-08-12 18:51:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-08-12 18:51:25,502 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-08-12 18:51:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:25,502 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-08-12 18:51:25,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-08-12 18:51:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-08-12 18:51:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:25,504 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:25,504 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:25,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 18:51:25,716 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-08-12 18:51:25,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:25,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006010451] [2021-08-12 18:51:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:25,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:25,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006010451] [2021-08-12 18:51:25,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006010451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:25,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948485547] [2021-08-12 18:51:25,754 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 [2021-08-12 18:51:25,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:25,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948485547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:25,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:25,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:51:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400475576] [2021-08-12 18:51:25,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:25,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:25,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:25,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:25,835 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:26,093 INFO L93 Difference]: Finished difference Result 1804 states and 4763 transitions. [2021-08-12 18:51:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:51:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 23 [2021-08-12 18:51:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:26,098 INFO L225 Difference]: With dead ends: 1804 [2021-08-12 18:51:26,099 INFO L226 Difference]: Without dead ends: 1538 [2021-08-12 18:51:26,100 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-08-12 18:51:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-08-12 18:51:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-08-12 18:51:26,164 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-08-12 18:51:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:26,164 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-08-12 18:51:26,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-08-12 18:51:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:26,165 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:26,165 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:26,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 18:51:26,382 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-08-12 18:51:26,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:26,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224747810] [2021-08-12 18:51:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:26,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224747810] [2021-08-12 18:51:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224747810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095673027] [2021-08-12 18:51:26,423 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 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 [2021-08-12 18:51:26,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:26,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:51:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:26,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095673027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:26,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:26,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:51:26,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289949809] [2021-08-12 18:51:26,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:26,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:26,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:26,492 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:26,698 INFO L93 Difference]: Finished difference Result 1573 states and 4079 transitions. [2021-08-12 18:51:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 18:51:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:26,703 INFO L225 Difference]: With dead ends: 1573 [2021-08-12 18:51:26,703 INFO L226 Difference]: Without dead ends: 1526 [2021-08-12 18:51:26,704 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-12 18:51:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-08-12 18:51:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-08-12 18:51:26,755 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-08-12 18:51:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:26,755 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-08-12 18:51:26,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-08-12 18:51:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:26,757 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:26,757 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:26,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:26,961 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-08-12 18:51:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654063457] [2021-08-12 18:51:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:26,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:26,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654063457] [2021-08-12 18:51:26,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654063457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104716536] [2021-08-12 18:51:26,999 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 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 [2021-08-12 18:51:27,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:51:27,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:27,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:27,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104716536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:27,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:27,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:51:27,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225523172] [2021-08-12 18:51:27,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:27,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:27,110 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-08-12 18:51:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:27,442 INFO L93 Difference]: Finished difference Result 2652 states and 7082 transitions. [2021-08-12 18:51:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:51:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 23 [2021-08-12 18:51:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:27,447 INFO L225 Difference]: With dead ends: 2652 [2021-08-12 18:51:27,447 INFO L226 Difference]: Without dead ends: 1913 [2021-08-12 18:51:27,448 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-08-12 18:51:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-08-12 18:51:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-08-12 18:51:27,509 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-08-12 18:51:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:27,510 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-08-12 18:51:27,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-08-12 18:51:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-08-12 18:51:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:27,512 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:27,512 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:27,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:27,714 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-08-12 18:51:27,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:27,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723230386] [2021-08-12 18:51:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:27,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:27,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723230386] [2021-08-12 18:51:27,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723230386] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:27,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:27,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60962151] [2021-08-12 18:51:27,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:27,756 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2021-08-12 18:51:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:27,962 INFO L93 Difference]: Finished difference Result 2345 states and 6241 transitions. [2021-08-12 18:51:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 23 [2021-08-12 18:51:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:27,967 INFO L225 Difference]: With dead ends: 2345 [2021-08-12 18:51:27,967 INFO L226 Difference]: Without dead ends: 1411 [2021-08-12 18:51:27,968 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-08-12 18:51:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-08-12 18:51:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-08-12 18:51:28,025 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-08-12 18:51:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:28,025 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-08-12 18:51:28,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2021-08-12 18:51:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-08-12 18:51:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:28,026 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:28,026 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:28,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-12 18:51:28,027 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:28,027 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-08-12 18:51:28,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:28,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932225593] [2021-08-12 18:51:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:51:28,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932225593] [2021-08-12 18:51:28,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932225593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144931433] [2021-08-12 18:51:28,063 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 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 [2021-08-12 18:51:28,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144931433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:28,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:28,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:51:28,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303469758] [2021-08-12 18:51:28,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:28,160 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:28,501 INFO L93 Difference]: Finished difference Result 2274 states and 5882 transitions. [2021-08-12 18:51:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:51:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 23 [2021-08-12 18:51:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:28,506 INFO L225 Difference]: With dead ends: 2274 [2021-08-12 18:51:28,506 INFO L226 Difference]: Without dead ends: 1612 [2021-08-12 18:51:28,507 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:51:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-08-12 18:51:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-08-12 18:51:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-08-12 18:51:28,565 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-08-12 18:51:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:28,566 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-08-12 18:51:28,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-08-12 18:51:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:28,567 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:28,567 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:28,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 18:51:28,784 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-08-12 18:51:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:28,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359292857] [2021-08-12 18:51:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:28,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:28,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359292857] [2021-08-12 18:51:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359292857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255855337] [2021-08-12 18:51:28,809 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 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 [2021-08-12 18:51:28,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:51:28,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:28,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:28,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255855337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:28,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:28,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-08-12 18:51:28,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390361056] [2021-08-12 18:51:28,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:51:28,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:51:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:28,944 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-08-12 18:51:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:29,679 INFO L93 Difference]: Finished difference Result 2975 states and 7517 transitions. [2021-08-12 18:51:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 18:51:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 23 [2021-08-12 18:51:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:29,686 INFO L225 Difference]: With dead ends: 2975 [2021-08-12 18:51:29,687 INFO L226 Difference]: Without dead ends: 2926 [2021-08-12 18:51:29,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:51:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-12 18:51:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-08-12 18:51:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-08-12 18:51:29,769 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-08-12 18:51:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:29,770 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-08-12 18:51:29,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-08-12 18:51:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-08-12 18:51:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:29,771 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:29,771 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:29,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:29,985 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-08-12 18:51:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:29,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863176911] [2021-08-12 18:51:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:30,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863176911] [2021-08-12 18:51:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863176911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601106087] [2021-08-12 18:51:30,020 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 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 [2021-08-12 18:51:30,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:51:30,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:30,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601106087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:30,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:30,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:51:30,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809718318] [2021-08-12 18:51:30,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:51:30,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:51:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:51:30,112 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:30,635 INFO L93 Difference]: Finished difference Result 2574 states and 6636 transitions. [2021-08-12 18:51:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:51:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-08-12 18:51:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:30,642 INFO L225 Difference]: With dead ends: 2574 [2021-08-12 18:51:30,642 INFO L226 Difference]: Without dead ends: 1746 [2021-08-12 18:51:30,644 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:51:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-08-12 18:51:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-08-12 18:51:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-08-12 18:51:30,736 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-08-12 18:51:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:30,736 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-08-12 18:51:30,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-08-12 18:51:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:51:30,739 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:30,739 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:30,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-12 18:51:30,951 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-08-12 18:51:30,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:30,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721069346] [2021-08-12 18:51:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:30,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:30,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721069346] [2021-08-12 18:51:30,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721069346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:30,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141369016] [2021-08-12 18:51:30,990 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 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 [2021-08-12 18:51:31,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:31,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141369016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:31,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:31,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:51:31,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159385920] [2021-08-12 18:51:31,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:31,068 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:31,373 INFO L93 Difference]: Finished difference Result 2036 states and 5205 transitions. [2021-08-12 18:51:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-08-12 18:51:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:31,381 INFO L225 Difference]: With dead ends: 2036 [2021-08-12 18:51:31,381 INFO L226 Difference]: Without dead ends: 1365 [2021-08-12 18:51:31,382 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-08-12 18:51:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-08-12 18:51:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-08-12 18:51:31,446 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-08-12 18:51:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:31,446 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-08-12 18:51:31,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-08-12 18:51:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:31,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:31,448 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:31,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:31,661 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-08-12 18:51:31,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:31,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071295262] [2021-08-12 18:51:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:31,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:31,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071295262] [2021-08-12 18:51:31,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071295262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:31,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622145838] [2021-08-12 18:51:31,714 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 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 [2021-08-12 18:51:31,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 18:51:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:31,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622145838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:31,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:31,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 18:51:31,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975839603] [2021-08-12 18:51:31,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:31,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:31,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:31,783 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 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) [2021-08-12 18:51:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:32,130 INFO L93 Difference]: Finished difference Result 1745 states and 4314 transitions. [2021-08-12 18:51:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:32,131 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 26 [2021-08-12 18:51:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:32,135 INFO L225 Difference]: With dead ends: 1745 [2021-08-12 18:51:32,135 INFO L226 Difference]: Without dead ends: 1715 [2021-08-12 18:51:32,136 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-08-12 18:51:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-08-12 18:51:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-08-12 18:51:32,205 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-08-12 18:51:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:32,205 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-08-12 18:51:32,205 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) [2021-08-12 18:51:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-08-12 18:51:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:32,208 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:32,208 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:32,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 18:51:32,426 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-08-12 18:51:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:32,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803627917] [2021-08-12 18:51:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:32,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:32,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803627917] [2021-08-12 18:51:32,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803627917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:32,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764592961] [2021-08-12 18:51:32,469 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 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 [2021-08-12 18:51:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:32,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764592961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:32,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:32,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:51:32,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434707449] [2021-08-12 18:51:32,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:32,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:32,541 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:32,942 INFO L93 Difference]: Finished difference Result 2504 states and 6395 transitions. [2021-08-12 18:51:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:32,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:32,949 INFO L225 Difference]: With dead ends: 2504 [2021-08-12 18:51:32,949 INFO L226 Difference]: Without dead ends: 2455 [2021-08-12 18:51:32,949 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-08-12 18:51:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-08-12 18:51:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-08-12 18:51:33,053 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-08-12 18:51:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:33,053 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-08-12 18:51:33,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-08-12 18:51:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:33,056 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:33,056 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:33,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:33,268 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-08-12 18:51:33,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:33,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832002977] [2021-08-12 18:51:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:33,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:33,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832002977] [2021-08-12 18:51:33,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832002977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:33,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398649361] [2021-08-12 18:51:33,297 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 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 [2021-08-12 18:51:33,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:33,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:33,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:33,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398649361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:33,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:33,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-08-12 18:51:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974570982] [2021-08-12 18:51:33,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:33,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:33,360 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:33,748 INFO L93 Difference]: Finished difference Result 2466 states and 6319 transitions. [2021-08-12 18:51:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:33,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:33,754 INFO L225 Difference]: With dead ends: 2466 [2021-08-12 18:51:33,754 INFO L226 Difference]: Without dead ends: 2447 [2021-08-12 18:51:33,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-08-12 18:51:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-08-12 18:51:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-08-12 18:51:33,844 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-08-12 18:51:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:33,844 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-08-12 18:51:33,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-08-12 18:51:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:33,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:33,847 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:34,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 18:51:34,061 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-08-12 18:51:34,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:34,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515380092] [2021-08-12 18:51:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:34,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515380092] [2021-08-12 18:51:34,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515380092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198994132] [2021-08-12 18:51:34,085 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 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 [2021-08-12 18:51:34,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:51:34,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:34,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198994132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:34,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:34,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83091747] [2021-08-12 18:51:34,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:34,151 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-12 18:51:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:34,458 INFO L93 Difference]: Finished difference Result 2122 states and 5557 transitions. [2021-08-12 18:51:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:34,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 26 [2021-08-12 18:51:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:34,463 INFO L225 Difference]: With dead ends: 2122 [2021-08-12 18:51:34,463 INFO L226 Difference]: Without dead ends: 2089 [2021-08-12 18:51:34,463 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-12 18:51:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-08-12 18:51:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-08-12 18:51:34,549 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-08-12 18:51:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:34,549 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-08-12 18:51:34,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-12 18:51:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-08-12 18:51:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:34,552 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:34,552 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:34,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:34,768 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-08-12 18:51:34,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:34,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280689478] [2021-08-12 18:51:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:34,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:34,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280689478] [2021-08-12 18:51:34,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280689478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:34,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460812276] [2021-08-12 18:51:34,795 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 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 [2021-08-12 18:51:34,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:34,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:34,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460812276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:34,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:34,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:34,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220470613] [2021-08-12 18:51:34,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:34,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:34,860 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:35,250 INFO L93 Difference]: Finished difference Result 2606 states and 6745 transitions. [2021-08-12 18:51:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 26 [2021-08-12 18:51:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:35,255 INFO L225 Difference]: With dead ends: 2606 [2021-08-12 18:51:35,255 INFO L226 Difference]: Without dead ends: 2552 [2021-08-12 18:51:35,256 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-08-12 18:51:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-08-12 18:51:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-08-12 18:51:35,373 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-08-12 18:51:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:35,373 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-08-12 18:51:35,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-08-12 18:51:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:35,375 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:35,375 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:35,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 18:51:35,576 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-08-12 18:51:35,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:35,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117868420] [2021-08-12 18:51:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:35,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117868420] [2021-08-12 18:51:35,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117868420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731127502] [2021-08-12 18:51:35,605 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 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 [2021-08-12 18:51:35,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:51:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:35,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731127502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:35,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:35,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-08-12 18:51:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590889052] [2021-08-12 18:51:35,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:35,674 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:36,234 INFO L93 Difference]: Finished difference Result 3773 states and 10117 transitions. [2021-08-12 18:51:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:36,243 INFO L225 Difference]: With dead ends: 3773 [2021-08-12 18:51:36,243 INFO L226 Difference]: Without dead ends: 3712 [2021-08-12 18:51:36,244 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-08-12 18:51:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-08-12 18:51:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-08-12 18:51:36,395 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-08-12 18:51:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:36,395 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-08-12 18:51:36,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-08-12 18:51:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:36,398 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:36,398 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:36,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-12 18:51:36,603 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-08-12 18:51:36,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:36,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180300046] [2021-08-12 18:51:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:51:36,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180300046] [2021-08-12 18:51:36,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180300046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739229783] [2021-08-12 18:51:36,640 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 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 [2021-08-12 18:51:36,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:51:36,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:36,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739229783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:36,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:36,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-08-12 18:51:36,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657497497] [2021-08-12 18:51:36,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:36,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:36,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:36,713 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:37,297 INFO L93 Difference]: Finished difference Result 3849 states and 10354 transitions. [2021-08-12 18:51:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:51:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:37,306 INFO L225 Difference]: With dead ends: 3849 [2021-08-12 18:51:37,307 INFO L226 Difference]: Without dead ends: 3830 [2021-08-12 18:51:37,307 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:51:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-08-12 18:51:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-08-12 18:51:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-08-12 18:51:37,469 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-08-12 18:51:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:37,469 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-08-12 18:51:37,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-08-12 18:51:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:37,471 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:37,471 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:37,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:37,672 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-08-12 18:51:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052758100] [2021-08-12 18:51:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:51:37,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:37,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052758100] [2021-08-12 18:51:37,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052758100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:37,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058871787] [2021-08-12 18:51:37,701 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:51:37,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058871787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:37,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:37,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:37,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496124269] [2021-08-12 18:51:37,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:37,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:37,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:37,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:37,776 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:38,258 INFO L93 Difference]: Finished difference Result 3683 states and 9957 transitions. [2021-08-12 18:51:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 26 [2021-08-12 18:51:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:38,265 INFO L225 Difference]: With dead ends: 3683 [2021-08-12 18:51:38,265 INFO L226 Difference]: Without dead ends: 3617 [2021-08-12 18:51:38,265 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-08-12 18:51:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-08-12 18:51:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-08-12 18:51:38,402 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-08-12 18:51:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:38,402 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-08-12 18:51:38,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-08-12 18:51:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-08-12 18:51:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:38,404 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:38,404 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:38,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-12 18:51:38,605 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-08-12 18:51:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:38,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226071663] [2021-08-12 18:51:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:38,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226071663] [2021-08-12 18:51:38,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226071663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:38,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031408821] [2021-08-12 18:51:38,640 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 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 [2021-08-12 18:51:38,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:38,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:38,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:38,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031408821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:38,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:38,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:51:38,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875707697] [2021-08-12 18:51:38,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:38,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:38,723 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:39,393 INFO L93 Difference]: Finished difference Result 4229 states and 11459 transitions. [2021-08-12 18:51:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:51:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:39,403 INFO L225 Difference]: With dead ends: 4229 [2021-08-12 18:51:39,403 INFO L226 Difference]: Without dead ends: 4208 [2021-08-12 18:51:39,404 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-08-12 18:51:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-08-12 18:51:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-08-12 18:51:39,561 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-08-12 18:51:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:39,561 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-08-12 18:51:39,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-08-12 18:51:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:39,564 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:39,564 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:39,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:39,765 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-08-12 18:51:39,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:39,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089779397] [2021-08-12 18:51:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:39,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:39,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089779397] [2021-08-12 18:51:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089779397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:39,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735548291] [2021-08-12 18:51:39,798 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 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 [2021-08-12 18:51:39,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:51:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:39,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735548291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:39,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:39,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-12 18:51:39,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717647215] [2021-08-12 18:51:39,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:39,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:39,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:39,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:39,867 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 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) [2021-08-12 18:51:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:40,400 INFO L93 Difference]: Finished difference Result 3906 states and 10694 transitions. [2021-08-12 18:51:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:40,400 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 26 [2021-08-12 18:51:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:40,409 INFO L225 Difference]: With dead ends: 3906 [2021-08-12 18:51:40,409 INFO L226 Difference]: Without dead ends: 3864 [2021-08-12 18:51:40,409 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-08-12 18:51:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-08-12 18:51:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-08-12 18:51:40,591 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-08-12 18:51:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:40,591 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-08-12 18:51:40,591 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) [2021-08-12 18:51:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-08-12 18:51:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:40,594 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:40,594 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:40,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 18:51:40,794 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:40,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-08-12 18:51:40,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:40,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159547786] [2021-08-12 18:51:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:40,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159547786] [2021-08-12 18:51:40,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159547786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233984594] [2021-08-12 18:51:40,829 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 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 [2021-08-12 18:51:40,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:40,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:51:40,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:40,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233984594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:40,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 18:51:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403889536] [2021-08-12 18:51:40,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:40,927 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:41,622 INFO L93 Difference]: Finished difference Result 4333 states and 11752 transitions. [2021-08-12 18:51:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:51:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:41,630 INFO L225 Difference]: With dead ends: 4333 [2021-08-12 18:51:41,630 INFO L226 Difference]: Without dead ends: 4288 [2021-08-12 18:51:41,631 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-08-12 18:51:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-08-12 18:51:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-08-12 18:51:41,795 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-08-12 18:51:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:41,795 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-08-12 18:51:41,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-08-12 18:51:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:41,798 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:41,798 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:41,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 18:51:41,999 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-08-12 18:51:41,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:41,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974520167] [2021-08-12 18:51:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:42,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:42,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974520167] [2021-08-12 18:51:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974520167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:42,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951100109] [2021-08-12 18:51:42,028 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 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 [2021-08-12 18:51:42,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:51:42,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:42,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951100109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:42,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:42,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-12 18:51:42,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395795270] [2021-08-12 18:51:42,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:42,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:42,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:42,120 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:42,871 INFO L93 Difference]: Finished difference Result 4937 states and 13722 transitions. [2021-08-12 18:51:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:42,881 INFO L225 Difference]: With dead ends: 4937 [2021-08-12 18:51:42,881 INFO L226 Difference]: Without dead ends: 4858 [2021-08-12 18:51:42,882 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-08-12 18:51:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-08-12 18:51:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-08-12 18:51:43,102 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-08-12 18:51:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:43,102 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-08-12 18:51:43,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-08-12 18:51:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:43,105 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:43,105 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:43,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:43,305 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-08-12 18:51:43,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:43,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844651662] [2021-08-12 18:51:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:43,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:43,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844651662] [2021-08-12 18:51:43,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844651662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:43,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600665655] [2021-08-12 18:51:43,337 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 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 [2021-08-12 18:51:43,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:51:43,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600665655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:43,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:43,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:43,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827691361] [2021-08-12 18:51:43,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:43,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:43,407 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-12 18:51:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:44,132 INFO L93 Difference]: Finished difference Result 5727 states and 15897 transitions. [2021-08-12 18:51:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 26 [2021-08-12 18:51:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:44,144 INFO L225 Difference]: With dead ends: 5727 [2021-08-12 18:51:44,144 INFO L226 Difference]: Without dead ends: 5697 [2021-08-12 18:51:44,145 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-08-12 18:51:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-08-12 18:51:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-08-12 18:51:44,394 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-08-12 18:51:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:44,394 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-08-12 18:51:44,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-12 18:51:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-08-12 18:51:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:44,397 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:44,397 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:44,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:44,597 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-08-12 18:51:44,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:44,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966696257] [2021-08-12 18:51:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:44,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:44,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966696257] [2021-08-12 18:51:44,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966696257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:44,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419215749] [2021-08-12 18:51:44,622 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:44,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419215749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:44,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:44,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-08-12 18:51:44,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363624394] [2021-08-12 18:51:44,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:44,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:44,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:44,684 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:45,529 INFO L93 Difference]: Finished difference Result 6221 states and 17566 transitions. [2021-08-12 18:51:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:45,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:45,543 INFO L225 Difference]: With dead ends: 6221 [2021-08-12 18:51:45,543 INFO L226 Difference]: Without dead ends: 6160 [2021-08-12 18:51:45,544 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-08-12 18:51:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-08-12 18:51:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-08-12 18:51:45,796 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-08-12 18:51:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:45,796 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-08-12 18:51:45,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-08-12 18:51:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:45,800 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:45,800 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:46,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:46,000 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-08-12 18:51:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449459323] [2021-08-12 18:51:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:46,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:46,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449459323] [2021-08-12 18:51:46,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449459323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:46,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936528579] [2021-08-12 18:51:46,026 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:46,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:46,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:46,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936528579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:46,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:46,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-08-12 18:51:46,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882961527] [2021-08-12 18:51:46,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:46,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:46,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:46,096 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:46,940 INFO L93 Difference]: Finished difference Result 6330 states and 17857 transitions. [2021-08-12 18:51:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:46,953 INFO L225 Difference]: With dead ends: 6330 [2021-08-12 18:51:46,953 INFO L226 Difference]: Without dead ends: 6311 [2021-08-12 18:51:46,954 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-08-12 18:51:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-08-12 18:51:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-08-12 18:51:47,259 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-08-12 18:51:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:47,259 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-08-12 18:51:47,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-08-12 18:51:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:47,262 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:47,262 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:47,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-12 18:51:47,463 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-08-12 18:51:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:47,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661350266] [2021-08-12 18:51:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:47,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:47,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661350266] [2021-08-12 18:51:47,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661350266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:47,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79451122] [2021-08-12 18:51:47,496 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:47,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:51:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79451122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:47,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:47,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:47,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699289053] [2021-08-12 18:51:47,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:47,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:47,557 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-12 18:51:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:48,344 INFO L93 Difference]: Finished difference Result 6522 states and 18229 transitions. [2021-08-12 18:51:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:51:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 26 [2021-08-12 18:51:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:48,357 INFO L225 Difference]: With dead ends: 6522 [2021-08-12 18:51:48,357 INFO L226 Difference]: Without dead ends: 6489 [2021-08-12 18:51:48,358 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-08-12 18:51:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-08-12 18:51:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-08-12 18:51:48,624 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-08-12 18:51:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:48,624 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-08-12 18:51:48,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-12 18:51:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-08-12 18:51:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:48,628 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:48,628 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:48,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:48,830 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-08-12 18:51:48,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:48,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82820337] [2021-08-12 18:51:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:48,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82820337] [2021-08-12 18:51:48,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82820337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685944437] [2021-08-12 18:51:48,865 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:48,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:48,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:48,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685944437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:48,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:48,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:51:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484289615] [2021-08-12 18:51:48,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:48,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:48,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:48,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:48,929 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:49,828 INFO L93 Difference]: Finished difference Result 6516 states and 18343 transitions. [2021-08-12 18:51:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:51:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:49,842 INFO L225 Difference]: With dead ends: 6516 [2021-08-12 18:51:49,842 INFO L226 Difference]: Without dead ends: 6497 [2021-08-12 18:51:49,843 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-08-12 18:51:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-08-12 18:51:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-08-12 18:51:50,135 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-08-12 18:51:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:50,136 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-08-12 18:51:50,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-08-12 18:51:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:50,139 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:50,139 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:50,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:50,340 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-08-12 18:51:50,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:50,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927465424] [2021-08-12 18:51:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:50,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:50,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927465424] [2021-08-12 18:51:50,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927465424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:50,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565417281] [2021-08-12 18:51:50,380 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:50,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:51:50,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565417281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:50,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:50,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-12 18:51:50,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932794220] [2021-08-12 18:51:50,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:50,462 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:51,535 INFO L93 Difference]: Finished difference Result 8040 states and 22731 transitions. [2021-08-12 18:51:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:51,552 INFO L225 Difference]: With dead ends: 8040 [2021-08-12 18:51:51,552 INFO L226 Difference]: Without dead ends: 7995 [2021-08-12 18:51:51,553 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:51:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-08-12 18:51:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-08-12 18:51:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-08-12 18:51:51,920 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-08-12 18:51:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:51,920 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-08-12 18:51:51,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-08-12 18:51:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:51,924 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:51,924 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:52,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-12 18:51:52,125 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-08-12 18:51:52,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:52,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894056412] [2021-08-12 18:51:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:52,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:52,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894056412] [2021-08-12 18:51:52,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894056412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:52,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739659581] [2021-08-12 18:51:52,198 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:52,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 18:51:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739659581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:52,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:52,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-12 18:51:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240260544] [2021-08-12 18:51:52,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:51:52,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:51:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:52,325 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:53,568 INFO L93 Difference]: Finished difference Result 8358 states and 23888 transitions. [2021-08-12 18:51:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:51:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 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 26 [2021-08-12 18:51:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:53,583 INFO L225 Difference]: With dead ends: 8358 [2021-08-12 18:51:53,583 INFO L226 Difference]: Without dead ends: 8305 [2021-08-12 18:51:53,585 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:51:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-08-12 18:51:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-08-12 18:51:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.863874345549738) internal successors, (15316), 5348 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-08-12 18:51:53,854 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-08-12 18:51:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:53,854 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-08-12 18:51:53,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-08-12 18:51:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 18:51:53,857 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:53,857 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:54,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:54,059 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-08-12 18:51:54,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:54,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717714324] [2021-08-12 18:51:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:54,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:54,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717714324] [2021-08-12 18:51:54,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717714324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:54,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214713079] [2021-08-12 18:51:54,099 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:51:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:54,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214713079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:54,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:54,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 18:51:54,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995662314] [2021-08-12 18:51:54,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:54,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:54,169 INFO L87 Difference]: Start difference. First operand 5349 states and 15316 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) [2021-08-12 18:51:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:55,115 INFO L93 Difference]: Finished difference Result 5968 states and 16593 transitions. [2021-08-12 18:51:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:55,116 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 26 [2021-08-12 18:51:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:55,129 INFO L225 Difference]: With dead ends: 5968 [2021-08-12 18:51:55,130 INFO L226 Difference]: Without dead ends: 5915 [2021-08-12 18:51:55,131 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:51:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-08-12 18:51:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-08-12 18:51:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 2.858018955584464) internal successors, (15379), 5381 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-08-12 18:51:55,409 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-08-12 18:51:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:55,409 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-08-12 18:51:55,409 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) [2021-08-12 18:51:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-08-12 18:51:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:51:55,413 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:55,413 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:55,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-12 18:51:55,614 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-08-12 18:51:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:55,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901117737] [2021-08-12 18:51:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:55,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:55,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901117737] [2021-08-12 18:51:55,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901117737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:55,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907245797] [2021-08-12 18:51:55,657 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:55,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:51:55,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:55,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907245797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:55,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:55,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:51:55,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417801912] [2021-08-12 18:51:55,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:55,732 INFO L87 Difference]: Start difference. First operand 5382 states and 15379 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:56,718 INFO L93 Difference]: Finished difference Result 6964 states and 19651 transitions. [2021-08-12 18:51:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:51:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-08-12 18:51:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:56,730 INFO L225 Difference]: With dead ends: 6964 [2021-08-12 18:51:56,731 INFO L226 Difference]: Without dead ends: 5890 [2021-08-12 18:51:56,733 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:51:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-08-12 18:51:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-08-12 18:51:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.823808654372832) internal successors, (15466), 5477 states have internal predecessors, (15466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-08-12 18:51:57,023 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-08-12 18:51:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:57,023 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-08-12 18:51:57,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-08-12 18:51:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:51:57,028 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:57,028 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:57,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:57,236 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-08-12 18:51:57,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:57,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787859826] [2021-08-12 18:51:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:57,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787859826] [2021-08-12 18:51:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787859826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577505628] [2021-08-12 18:51:57,269 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:57,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:51:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577505628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:57,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:57,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:51:57,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865276129] [2021-08-12 18:51:57,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:57,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:57,344 INFO L87 Difference]: Start difference. First operand 5478 states and 15466 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:58,267 INFO L93 Difference]: Finished difference Result 6573 states and 18238 transitions. [2021-08-12 18:51:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:51:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-08-12 18:51:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:58,283 INFO L225 Difference]: With dead ends: 6573 [2021-08-12 18:51:58,284 INFO L226 Difference]: Without dead ends: 6564 [2021-08-12 18:51:58,285 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-08-12 18:51:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-08-12 18:51:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6353 states have (on average 2.808279552967102) internal successors, (17841), 6353 states have internal predecessors, (17841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-08-12 18:51:58,674 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-08-12 18:51:58,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:58,674 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-08-12 18:51:58,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-08-12 18:51:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:51:58,679 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:58,679 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:58,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:58,879 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-08-12 18:51:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:58,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351207745] [2021-08-12 18:51:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 18:51:58,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:58,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351207745] [2021-08-12 18:51:58,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351207745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:58,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995548348] [2021-08-12 18:51:58,915 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:58,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:51:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 18:51:59,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995548348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:59,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:59,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-08-12 18:51:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757165874] [2021-08-12 18:51:59,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:51:59,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:59,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:51:59,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:59,089 INFO L87 Difference]: Start difference. First operand 6354 states and 17841 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:01,873 INFO L93 Difference]: Finished difference Result 14538 states and 39649 transitions. [2021-08-12 18:52:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 18:52:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:01,903 INFO L225 Difference]: With dead ends: 14538 [2021-08-12 18:52:01,903 INFO L226 Difference]: Without dead ends: 14355 [2021-08-12 18:52:01,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-08-12 18:52:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-08-12 18:52:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-08-12 18:52:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.8627629334849347) internal successors, (25178), 8795 states have internal predecessors, (25178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-08-12 18:52:02,483 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-08-12 18:52:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:02,484 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-08-12 18:52:02,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-08-12 18:52:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:02,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:02,490 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:02,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:02,691 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-08-12 18:52:02,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:02,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77838799] [2021-08-12 18:52:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:02,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77838799] [2021-08-12 18:52:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77838799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837863474] [2021-08-12 18:52:02,753 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:02,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 18:52:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:52:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:02,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 18:52:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-12 18:52:02,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:02,903 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-08-12 18:52:02,903 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-08-12 18:52:02,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:02,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-08-12 18:52:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:02,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837863474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:02,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:02,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 18:52:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97459917] [2021-08-12 18:52:02,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:52:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:52:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:02,910 INFO L87 Difference]: Start difference. First operand 8796 states and 25178 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:04,235 INFO L93 Difference]: Finished difference Result 13696 states and 39432 transitions. [2021-08-12 18:52:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:04,252 INFO L225 Difference]: With dead ends: 13696 [2021-08-12 18:52:04,252 INFO L226 Difference]: Without dead ends: 5857 [2021-08-12 18:52:04,260 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-08-12 18:52:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-08-12 18:52:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 2.7981375788525082) internal successors, (9315), 3329 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-08-12 18:52:04,492 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-08-12 18:52:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:04,492 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-08-12 18:52:04,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-08-12 18:52:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:04,495 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:04,495 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:04,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:04,696 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-08-12 18:52:04,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:04,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058751033] [2021-08-12 18:52:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:04,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:04,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058751033] [2021-08-12 18:52:04,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058751033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:04,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756887842] [2021-08-12 18:52:04,740 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:04,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:04,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756887842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:04,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:04,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 18:52:04,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893507661] [2021-08-12 18:52:04,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:52:04,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:52:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:04,817 INFO L87 Difference]: Start difference. First operand 3330 states and 9315 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:05,469 INFO L93 Difference]: Finished difference Result 3887 states and 10778 transitions. [2021-08-12 18:52:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:05,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:05,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:05,478 INFO L225 Difference]: With dead ends: 3887 [2021-08-12 18:52:05,478 INFO L226 Difference]: Without dead ends: 3434 [2021-08-12 18:52:05,479 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-08-12 18:52:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-08-12 18:52:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 2.794634873323398) internal successors, (9376), 3355 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-08-12 18:52:05,693 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-08-12 18:52:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:05,693 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-08-12 18:52:05,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-08-12 18:52:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:05,695 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:05,695 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:05,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-12 18:52:05,897 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-08-12 18:52:05,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:05,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729653818] [2021-08-12 18:52:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:52:05,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:05,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729653818] [2021-08-12 18:52:05,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729653818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:05,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778420959] [2021-08-12 18:52:05,949 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:05,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 18:52:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:52:06,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778420959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:06,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:06,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 18:52:06,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119850529] [2021-08-12 18:52:06,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:52:06,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:06,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:52:06,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:06,016 INFO L87 Difference]: Start difference. First operand 3356 states and 9376 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:06,920 INFO L93 Difference]: Finished difference Result 5247 states and 14531 transitions. [2021-08-12 18:52:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:06,932 INFO L225 Difference]: With dead ends: 5247 [2021-08-12 18:52:06,933 INFO L226 Difference]: Without dead ends: 3777 [2021-08-12 18:52:06,935 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-08-12 18:52:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-08-12 18:52:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.779779198140616) internal successors, (9568), 3442 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-08-12 18:52:07,167 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-08-12 18:52:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:07,167 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-08-12 18:52:07,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-08-12 18:52:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:07,169 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:07,169 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:07,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-12 18:52:07,370 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-08-12 18:52:07,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:07,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011412494] [2021-08-12 18:52:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:52:07,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011412494] [2021-08-12 18:52:07,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011412494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626967688] [2021-08-12 18:52:07,419 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:07,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:07,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:07,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:52:07,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626967688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:07,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:07,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 18:52:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199423669] [2021-08-12 18:52:07,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:52:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:52:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:07,501 INFO L87 Difference]: Start difference. First operand 3443 states and 9568 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:08,376 INFO L93 Difference]: Finished difference Result 5291 states and 14517 transitions. [2021-08-12 18:52:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:08,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:08,386 INFO L225 Difference]: With dead ends: 5291 [2021-08-12 18:52:08,386 INFO L226 Difference]: Without dead ends: 3623 [2021-08-12 18:52:08,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-08-12 18:52:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-08-12 18:52:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 2.7607142857142857) internal successors, (9276), 3360 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-08-12 18:52:08,605 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-08-12 18:52:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:08,605 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-08-12 18:52:08,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-08-12 18:52:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:08,608 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:08,608 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:08,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 18:52:08,808 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-08-12 18:52:08,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:08,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375134278] [2021-08-12 18:52:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:52:08,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:08,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375134278] [2021-08-12 18:52:08,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375134278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:08,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607040059] [2021-08-12 18:52:08,852 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:08,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 18:52:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:52:08,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607040059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:08,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:08,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 18:52:08,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549179682] [2021-08-12 18:52:08,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:52:08,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:52:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:08,919 INFO L87 Difference]: Start difference. First operand 3361 states and 9276 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:09,772 INFO L93 Difference]: Finished difference Result 5329 states and 14641 transitions. [2021-08-12 18:52:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:09,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 18:52:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:09,786 INFO L225 Difference]: With dead ends: 5329 [2021-08-12 18:52:09,786 INFO L226 Difference]: Without dead ends: 3907 [2021-08-12 18:52:09,788 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-08-12 18:52:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-08-12 18:52:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 2.745879120879121) internal successors, (9995), 3640 states have internal predecessors, (9995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-08-12 18:52:10,040 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-08-12 18:52:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:10,040 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-08-12 18:52:10,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-08-12 18:52:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:10,043 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:10,043 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:10,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-12 18:52:10,244 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-08-12 18:52:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:10,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604074186] [2021-08-12 18:52:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 18:52:10,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:10,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604074186] [2021-08-12 18:52:10,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604074186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:10,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059619635] [2021-08-12 18:52:10,272 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:10,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:10,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:52:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 18:52:10,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059619635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:10,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:10,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:52:10,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161095811] [2021-08-12 18:52:10,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:52:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:52:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:52:10,342 INFO L87 Difference]: Start difference. First operand 3641 states and 9995 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:11,313 INFO L93 Difference]: Finished difference Result 4881 states and 13399 transitions. [2021-08-12 18:52:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:52:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 18:52:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:11,326 INFO L225 Difference]: With dead ends: 4881 [2021-08-12 18:52:11,327 INFO L226 Difference]: Without dead ends: 4866 [2021-08-12 18:52:11,327 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:52:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-08-12 18:52:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-08-12 18:52:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 2.7981550625960905) internal successors, (12740), 4553 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-08-12 18:52:11,625 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-08-12 18:52:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:11,625 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-08-12 18:52:11,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-08-12 18:52:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:11,628 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:11,628 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:11,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-12 18:52:11,829 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-08-12 18:52:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:11,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082574249] [2021-08-12 18:52:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:11,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082574249] [2021-08-12 18:52:11,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082574249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644480220] [2021-08-12 18:52:11,869 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:11,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:52:11,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:11,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 18:52:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-12 18:52:11,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:11,944 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-08-12 18:52:11,944 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-08-12 18:52:11,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:11,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-08-12 18:52:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:11,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644480220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:11,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:11,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 18:52:11,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621464396] [2021-08-12 18:52:11,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:52:11,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:11,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:52:11,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:11,952 INFO L87 Difference]: Start difference. First operand 4554 states and 12740 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:13,634 INFO L93 Difference]: Finished difference Result 11108 states and 31544 transitions. [2021-08-12 18:52:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:52:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:13,651 INFO L225 Difference]: With dead ends: 11108 [2021-08-12 18:52:13,652 INFO L226 Difference]: Without dead ends: 7689 [2021-08-12 18:52:13,657 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:52:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-08-12 18:52:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-08-12 18:52:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.8100136136741796) internal successors, (18577), 6611 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-08-12 18:52:14,105 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-08-12 18:52:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:14,105 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-08-12 18:52:14,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-08-12 18:52:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:14,108 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:14,108 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:14,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-12 18:52:14,313 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-08-12 18:52:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:14,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819887266] [2021-08-12 18:52:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:14,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819887266] [2021-08-12 18:52:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819887266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956688658] [2021-08-12 18:52:14,353 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:52:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:14,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 18:52:14,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-12 18:52:14,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:14,434 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-08-12 18:52:14,434 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-08-12 18:52:14,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:14,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-08-12 18:52:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:14,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956688658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:14,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:14,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 18:52:14,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776566614] [2021-08-12 18:52:14,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:52:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:52:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:14,440 INFO L87 Difference]: Start difference. First operand 6612 states and 18577 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:16,222 INFO L93 Difference]: Finished difference Result 8269 states and 22712 transitions. [2021-08-12 18:52:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:52:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:16,242 INFO L225 Difference]: With dead ends: 8269 [2021-08-12 18:52:16,242 INFO L226 Difference]: Without dead ends: 7662 [2021-08-12 18:52:16,244 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:52:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-08-12 18:52:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-08-12 18:52:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6971 states have (on average 2.7987376273131543) internal successors, (19510), 6971 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-08-12 18:52:16,710 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-08-12 18:52:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:16,711 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-08-12 18:52:16,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-08-12 18:52:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:16,715 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:16,715 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:16,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:16,915 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-08-12 18:52:16,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:16,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023523661] [2021-08-12 18:52:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:16,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:16,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023523661] [2021-08-12 18:52:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023523661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833230538] [2021-08-12 18:52:16,959 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:16,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:52:16,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:16,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:16,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:17,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833230538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:17,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:17,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 18:52:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954711199] [2021-08-12 18:52:17,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:17,062 INFO L87 Difference]: Start difference. First operand 6972 states and 19510 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:18,452 INFO L93 Difference]: Finished difference Result 11008 states and 30833 transitions. [2021-08-12 18:52:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:52:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:18,471 INFO L225 Difference]: With dead ends: 11008 [2021-08-12 18:52:18,471 INFO L226 Difference]: Without dead ends: 6823 [2021-08-12 18:52:18,475 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-08-12 18:52:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-08-12 18:52:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.82673568818514) internal successors, (18566), 6568 states have internal predecessors, (18566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-08-12 18:52:18,918 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-08-12 18:52:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:18,919 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-08-12 18:52:18,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-08-12 18:52:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:18,922 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:18,922 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:19,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-12 18:52:19,122 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-08-12 18:52:19,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:19,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433832595] [2021-08-12 18:52:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:19,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:19,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433832595] [2021-08-12 18:52:19,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433832595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:19,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230304109] [2021-08-12 18:52:19,175 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:19,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:19,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230304109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:19,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:19,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 18:52:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78810577] [2021-08-12 18:52:19,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:52:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:19,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:52:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:19,256 INFO L87 Difference]: Start difference. First operand 6569 states and 18566 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:20,750 INFO L93 Difference]: Finished difference Result 9418 states and 26320 transitions. [2021-08-12 18:52:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:20,774 INFO L225 Difference]: With dead ends: 9418 [2021-08-12 18:52:20,774 INFO L226 Difference]: Without dead ends: 6928 [2021-08-12 18:52:20,778 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-08-12 18:52:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-08-12 18:52:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.8214231757063) internal successors, (18675), 6619 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-08-12 18:52:21,284 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-08-12 18:52:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:21,285 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-08-12 18:52:21,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-08-12 18:52:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:21,288 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:21,289 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:21,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:21,505 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-08-12 18:52:21,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:21,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611015487] [2021-08-12 18:52:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:21,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611015487] [2021-08-12 18:52:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611015487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245195154] [2021-08-12 18:52:21,544 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:21,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 18:52:21,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:52:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:21,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 18:52:21,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-12 18:52:21,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:21,638 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-08-12 18:52:21,638 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-08-12 18:52:21,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:21,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-08-12 18:52:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:21,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245195154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:21,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:21,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 18:52:21,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241474040] [2021-08-12 18:52:21,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:52:21,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:52:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:21,647 INFO L87 Difference]: Start difference. First operand 6620 states and 18675 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:23,181 INFO L93 Difference]: Finished difference Result 8977 states and 24855 transitions. [2021-08-12 18:52:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:23,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:23,203 INFO L225 Difference]: With dead ends: 8977 [2021-08-12 18:52:23,203 INFO L226 Difference]: Without dead ends: 6334 [2021-08-12 18:52:23,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-08-12 18:52:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-08-12 18:52:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 2.8169132481506387) internal successors, (16755), 5948 states have internal predecessors, (16755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-08-12 18:52:23,680 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-08-12 18:52:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:23,680 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-08-12 18:52:23,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-08-12 18:52:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:23,683 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:23,683 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:23,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-12 18:52:23,897 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-08-12 18:52:23,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:23,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837055151] [2021-08-12 18:52:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:23,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:23,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837055151] [2021-08-12 18:52:23,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837055151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:23,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631624734] [2021-08-12 18:52:23,928 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:23,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 18:52:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:52:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:23,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631624734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:23,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:23,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 18:52:23,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646497820] [2021-08-12 18:52:23,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:52:23,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:52:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:52:23,996 INFO L87 Difference]: Start difference. First operand 5949 states and 16755 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:25,437 INFO L93 Difference]: Finished difference Result 6993 states and 19597 transitions. [2021-08-12 18:52:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:52:25,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:25,460 INFO L225 Difference]: With dead ends: 6993 [2021-08-12 18:52:25,460 INFO L226 Difference]: Without dead ends: 6978 [2021-08-12 18:52:25,461 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:52:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-08-12 18:52:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-08-12 18:52:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6732 states, 6731 states have (on average 2.834794235626207) internal successors, (19081), 6731 states have internal predecessors, (19081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-08-12 18:52:25,948 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-08-12 18:52:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:25,948 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-08-12 18:52:25,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-08-12 18:52:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 18:52:25,952 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:25,953 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:26,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:26,153 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-08-12 18:52:26,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:26,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607514833] [2021-08-12 18:52:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607514833] [2021-08-12 18:52:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607514833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831624615] [2021-08-12 18:52:26,198 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:52:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831624615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:26,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:26,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:52:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428969107] [2021-08-12 18:52:26,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:26,264 INFO L87 Difference]: Start difference. First operand 6732 states and 19081 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:27,670 INFO L93 Difference]: Finished difference Result 9307 states and 26331 transitions. [2021-08-12 18:52:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:52:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-08-12 18:52:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:27,690 INFO L225 Difference]: With dead ends: 9307 [2021-08-12 18:52:27,690 INFO L226 Difference]: Without dead ends: 6601 [2021-08-12 18:52:27,694 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:52:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-08-12 18:52:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-08-12 18:52:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 2.8304786297422764) internal successors, (17682), 6247 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-08-12 18:52:28,142 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-08-12 18:52:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:28,143 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-08-12 18:52:28,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-08-12 18:52:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:28,146 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:28,146 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:28,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:28,347 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-08-12 18:52:28,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:28,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479127878] [2021-08-12 18:52:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:28,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479127878] [2021-08-12 18:52:28,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479127878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:28,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856647219] [2021-08-12 18:52:28,411 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:28,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 18:52:28,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856647219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:28,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:28,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 18:52:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235927688] [2021-08-12 18:52:28,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:52:28,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:52:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:28,488 INFO L87 Difference]: Start difference. First operand 6248 states and 17682 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:30,060 INFO L93 Difference]: Finished difference Result 6812 states and 18810 transitions. [2021-08-12 18:52:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:52:30,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:30,081 INFO L225 Difference]: With dead ends: 6812 [2021-08-12 18:52:30,081 INFO L226 Difference]: Without dead ends: 6779 [2021-08-12 18:52:30,082 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:52:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-08-12 18:52:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-08-12 18:52:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 2.829550941574119) internal successors, (17580), 6213 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-08-12 18:52:30,575 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-08-12 18:52:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-08-12 18:52:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-08-12 18:52:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:30,579 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:30,580 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:30,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:30,793 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-08-12 18:52:30,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:30,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019378543] [2021-08-12 18:52:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:30,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:30,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019378543] [2021-08-12 18:52:30,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019378543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:30,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123975380] [2021-08-12 18:52:30,835 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:30,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123975380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:30,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:30,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-08-12 18:52:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903944794] [2021-08-12 18:52:30,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:52:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:52:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:30,917 INFO L87 Difference]: Start difference. First operand 6214 states and 17580 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:33,304 INFO L93 Difference]: Finished difference Result 9090 states and 24879 transitions. [2021-08-12 18:52:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:52:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:33,328 INFO L225 Difference]: With dead ends: 9090 [2021-08-12 18:52:33,329 INFO L226 Difference]: Without dead ends: 9035 [2021-08-12 18:52:33,330 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-08-12 18:52:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-08-12 18:52:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7541 states, 7540 states have (on average 2.8545092838196284) internal successors, (21523), 7540 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-08-12 18:52:33,880 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-08-12 18:52:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:33,881 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-08-12 18:52:33,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-08-12 18:52:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:33,885 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:33,885 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:34,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 18:52:34,085 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-08-12 18:52:34,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:34,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554709801] [2021-08-12 18:52:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:34,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:34,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554709801] [2021-08-12 18:52:34,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554709801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:34,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208889713] [2021-08-12 18:52:34,116 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:34,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:34,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:34,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208889713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:34,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:34,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:52:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291995737] [2021-08-12 18:52:34,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:34,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:34,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:34,205 INFO L87 Difference]: Start difference. First operand 7541 states and 21523 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:36,657 INFO L93 Difference]: Finished difference Result 9046 states and 24803 transitions. [2021-08-12 18:52:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:52:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:36,685 INFO L225 Difference]: With dead ends: 9046 [2021-08-12 18:52:36,686 INFO L226 Difference]: Without dead ends: 9025 [2021-08-12 18:52:36,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-08-12 18:52:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-08-12 18:52:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.8473655621944594) internal successors, (20968), 7364 states have internal predecessors, (20968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-08-12 18:52:37,255 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-08-12 18:52:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:37,256 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-08-12 18:52:37,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-08-12 18:52:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:37,260 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:37,260 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:37,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-12 18:52:37,460 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-08-12 18:52:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:37,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563000102] [2021-08-12 18:52:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:37,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:37,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563000102] [2021-08-12 18:52:37,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563000102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:37,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064835993] [2021-08-12 18:52:37,493 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:37,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:52:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-12 18:52:37,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064835993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:37,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:37,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-08-12 18:52:37,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96333913] [2021-08-12 18:52:37,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:52:37,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:52:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:52:37,703 INFO L87 Difference]: Start difference. First operand 7365 states and 20968 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:40,048 INFO L93 Difference]: Finished difference Result 8333 states and 22818 transitions. [2021-08-12 18:52:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 18:52:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:40,071 INFO L225 Difference]: With dead ends: 8333 [2021-08-12 18:52:40,071 INFO L226 Difference]: Without dead ends: 8260 [2021-08-12 18:52:40,072 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:52:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-08-12 18:52:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-08-12 18:52:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 2.81664464993395) internal successors, (21322), 7570 states have internal predecessors, (21322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-08-12 18:52:40,667 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-08-12 18:52:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:40,668 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-08-12 18:52:40,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-08-12 18:52:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:40,672 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:40,672 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:40,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 18:52:40,873 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-08-12 18:52:40,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:40,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630131787] [2021-08-12 18:52:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:40,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:40,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630131787] [2021-08-12 18:52:40,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630131787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:40,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533829046] [2021-08-12 18:52:40,909 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:40,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:40,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:40,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:41,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533829046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:41,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:41,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-08-12 18:52:41,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288509285] [2021-08-12 18:52:41,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:41,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:41,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:41,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:41,009 INFO L87 Difference]: Start difference. First operand 7571 states and 21322 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:44,748 INFO L93 Difference]: Finished difference Result 13133 states and 36302 transitions. [2021-08-12 18:52:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:52:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:44,781 INFO L225 Difference]: With dead ends: 13133 [2021-08-12 18:52:44,781 INFO L226 Difference]: Without dead ends: 13088 [2021-08-12 18:52:44,783 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:52:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-08-12 18:52:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-08-12 18:52:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.8707727186850556) internal successors, (30390), 10586 states have internal predecessors, (30390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-08-12 18:52:45,559 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-08-12 18:52:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:45,559 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-08-12 18:52:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-08-12 18:52:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:45,564 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:45,564 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:45,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:45,765 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-08-12 18:52:45,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:45,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227147127] [2021-08-12 18:52:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:45,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227147127] [2021-08-12 18:52:45,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227147127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:45,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233819160] [2021-08-12 18:52:45,802 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:45,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 18:52:45,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:45,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233819160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:45,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:45,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-12 18:52:45,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529496825] [2021-08-12 18:52:45,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:45,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:45,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:45,893 INFO L87 Difference]: Start difference. First operand 10587 states and 30390 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:48,663 INFO L93 Difference]: Finished difference Result 11768 states and 33032 transitions. [2021-08-12 18:52:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:52:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:48,694 INFO L225 Difference]: With dead ends: 11768 [2021-08-12 18:52:48,694 INFO L226 Difference]: Without dead ends: 11705 [2021-08-12 18:52:48,696 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-08-12 18:52:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-08-12 18:52:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 2.8569807037457435) internal successors, (30204), 10572 states have internal predecessors, (30204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-08-12 18:52:49,509 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-08-12 18:52:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:49,510 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-08-12 18:52:49,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-08-12 18:52:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:49,515 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:49,515 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:49,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-12 18:52:49,715 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:49,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-08-12 18:52:49,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:49,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767991365] [2021-08-12 18:52:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:49,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767991365] [2021-08-12 18:52:49,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767991365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106619730] [2021-08-12 18:52:49,754 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:49,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 18:52:49,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:49,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106619730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:49,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:49,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:52:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513554887] [2021-08-12 18:52:49,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:49,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:49,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:49,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:49,826 INFO L87 Difference]: Start difference. First operand 10573 states and 30204 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:54,459 INFO L93 Difference]: Finished difference Result 17452 states and 48830 transitions. [2021-08-12 18:52:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:52:54,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2021-08-12 18:52:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:54,502 INFO L225 Difference]: With dead ends: 17452 [2021-08-12 18:52:54,503 INFO L226 Difference]: Without dead ends: 17375 [2021-08-12 18:52:54,506 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-08-12 18:52:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-08-12 18:52:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13902 states, 13901 states have (on average 2.8969138910869723) internal successors, (40270), 13901 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-08-12 18:52:55,505 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-08-12 18:52:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:55,506 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-08-12 18:52:55,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-08-12 18:52:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:52:55,510 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:55,510 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:55,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-12 18:52:55,711 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-08-12 18:52:55,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:55,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753584481] [2021-08-12 18:52:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:52:55,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:55,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753584481] [2021-08-12 18:52:55,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753584481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:55,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857738632] [2021-08-12 18:52:55,742 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857738632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:55,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:55,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-08-12 18:52:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522919109] [2021-08-12 18:52:55,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:55,815 INFO L87 Difference]: Start difference. First operand 13902 states and 40270 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:00,565 INFO L93 Difference]: Finished difference Result 17250 states and 47989 transitions. [2021-08-12 18:53:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:53:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2021-08-12 18:53:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:00,622 INFO L225 Difference]: With dead ends: 17250 [2021-08-12 18:53:00,622 INFO L226 Difference]: Without dead ends: 17226 [2021-08-12 18:53:00,626 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-08-12 18:53:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-08-12 18:53:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.8902298850574715) internal successors, (40232), 13920 states have internal predecessors, (40232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-08-12 18:53:01,785 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-08-12 18:53:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:01,786 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-08-12 18:53:01,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-08-12 18:53:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:53:01,791 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:01,791 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:01,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-12 18:53:01,992 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-08-12 18:53:01,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:01,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062055090] [2021-08-12 18:53:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:53:02,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062055090] [2021-08-12 18:53:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062055090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240008292] [2021-08-12 18:53:02,043 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:02,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:02,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:53:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240008292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:02,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:02,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-08-12 18:53:02,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326104682] [2021-08-12 18:53:02,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:53:02,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:53:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:53:02,116 INFO L87 Difference]: Start difference. First operand 13921 states and 40232 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:07,126 INFO L93 Difference]: Finished difference Result 17353 states and 48024 transitions. [2021-08-12 18:53:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:53:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2021-08-12 18:53:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:07,178 INFO L225 Difference]: With dead ends: 17353 [2021-08-12 18:53:07,179 INFO L226 Difference]: Without dead ends: 17329 [2021-08-12 18:53:07,184 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:53:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-08-12 18:53:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-08-12 18:53:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13801 states have (on average 2.883124411274545) internal successors, (39790), 13801 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-08-12 18:53:08,328 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-08-12 18:53:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:08,329 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-08-12 18:53:08,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-08-12 18:53:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 18:53:08,334 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:08,334 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:08,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-12 18:53:08,535 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-08-12 18:53:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724008587] [2021-08-12 18:53:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:08,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724008587] [2021-08-12 18:53:08,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724008587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479588260] [2021-08-12 18:53:08,594 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:08,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 18:53:08,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:53:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-12 18:53:08,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479588260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:08,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:08,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-12 18:53:08,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310818882] [2021-08-12 18:53:08,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:53:08,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:53:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:53:08,771 INFO L87 Difference]: Start difference. First operand 13802 states and 39790 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:15,245 INFO L93 Difference]: Finished difference Result 22745 states and 64002 transitions. [2021-08-12 18:53:15,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 18:53:15,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 32 [2021-08-12 18:53:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:15,308 INFO L225 Difference]: With dead ends: 22745 [2021-08-12 18:53:15,308 INFO L226 Difference]: Without dead ends: 22654 [2021-08-12 18:53:15,315 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 18:53:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-08-12 18:53:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-08-12 18:53:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15246 states, 15245 states have (on average 2.8751065923253525) internal successors, (43831), 15245 states have internal predecessors, (43831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-08-12 18:53:16,616 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-08-12 18:53:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:16,616 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-08-12 18:53:16,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-08-12 18:53:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:16,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:16,623 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:16,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-12 18:53:16,824 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-08-12 18:53:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:16,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137519776] [2021-08-12 18:53:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:16,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:16,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137519776] [2021-08-12 18:53:16,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137519776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:16,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308375194] [2021-08-12 18:53:16,886 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:16,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 18:53:16,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:16,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:16,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308375194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:16,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:16,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 18:53:16,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14812078] [2021-08-12 18:53:16,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:16,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:16,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:16,962 INFO L87 Difference]: Start difference. First operand 15246 states and 43831 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:20,415 INFO L93 Difference]: Finished difference Result 16554 states and 47152 transitions. [2021-08-12 18:53:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:53:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:20,468 INFO L225 Difference]: With dead ends: 16554 [2021-08-12 18:53:20,468 INFO L226 Difference]: Without dead ends: 15903 [2021-08-12 18:53:20,475 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:53:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-08-12 18:53:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-08-12 18:53:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15141 states, 15140 states have (on average 2.8762879788639366) internal successors, (43547), 15140 states have internal predecessors, (43547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-08-12 18:53:21,715 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-08-12 18:53:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:21,715 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-08-12 18:53:21,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-08-12 18:53:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:21,723 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:21,723 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:21,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:21,924 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-08-12 18:53:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:21,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508551357] [2021-08-12 18:53:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:21,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508551357] [2021-08-12 18:53:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508551357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102131825] [2021-08-12 18:53:21,996 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:22,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:22,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102131825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:22,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:22,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 18:53:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140391143] [2021-08-12 18:53:22,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:53:22,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:53:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:53:22,149 INFO L87 Difference]: Start difference. First operand 15141 states and 43547 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:25,434 INFO L93 Difference]: Finished difference Result 16020 states and 45737 transitions. [2021-08-12 18:53:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:53:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:25,480 INFO L225 Difference]: With dead ends: 16020 [2021-08-12 18:53:25,480 INFO L226 Difference]: Without dead ends: 15016 [2021-08-12 18:53:25,485 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:53:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-08-12 18:53:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-08-12 18:53:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-08-12 18:53:26,656 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-08-12 18:53:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:26,657 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-08-12 18:53:26,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-08-12 18:53:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:26,663 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:26,663 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:26,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-12 18:53:26,869 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-08-12 18:53:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668308031] [2021-08-12 18:53:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:26,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:26,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668308031] [2021-08-12 18:53:26,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668308031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:26,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188358313] [2021-08-12 18:53:26,921 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:26,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 18:53:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:26,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188358313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:26,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:26,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 18:53:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167466530] [2021-08-12 18:53:26,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:53:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:53:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:53:26,996 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:30,121 INFO L93 Difference]: Finished difference Result 15422 states and 44150 transitions. [2021-08-12 18:53:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:53:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:30,164 INFO L225 Difference]: With dead ends: 15422 [2021-08-12 18:53:30,164 INFO L226 Difference]: Without dead ends: 15202 [2021-08-12 18:53:30,167 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-08-12 18:53:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-08-12 18:53:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-08-12 18:53:31,293 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-08-12 18:53:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:31,294 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-08-12 18:53:31,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-08-12 18:53:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:31,300 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:31,300 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:31,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:31,501 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-08-12 18:53:31,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:31,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107607137] [2021-08-12 18:53:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:31,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:31,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107607137] [2021-08-12 18:53:31,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107607137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:31,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454632637] [2021-08-12 18:53:31,565 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:31,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:31,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:53:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:31,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454632637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:31,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:31,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-08-12 18:53:31,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022443834] [2021-08-12 18:53:31,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:31,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:31,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:31,648 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:36,423 INFO L93 Difference]: Finished difference Result 16747 states and 46999 transitions. [2021-08-12 18:53:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:53:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:36,471 INFO L225 Difference]: With dead ends: 16747 [2021-08-12 18:53:36,471 INFO L226 Difference]: Without dead ends: 16694 [2021-08-12 18:53:36,475 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:53:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-08-12 18:53:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-08-12 18:53:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 15012 states have (on average 2.8758326671995738) internal successors, (43172), 15012 states have internal predecessors, (43172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-08-12 18:53:37,750 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-08-12 18:53:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:37,750 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-08-12 18:53:37,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-08-12 18:53:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:37,757 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:37,757 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:37,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:37,957 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:37,958 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-08-12 18:53:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:37,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761058062] [2021-08-12 18:53:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:53:38,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761058062] [2021-08-12 18:53:38,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761058062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188393373] [2021-08-12 18:53:38,110 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:38,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:38,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:38,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:53:38,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188393373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:38,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:38,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:53:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063598354] [2021-08-12 18:53:38,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:53:38,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:53:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:53:38,198 INFO L87 Difference]: Start difference. First operand 15013 states and 43172 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-08-12 18:53:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:41,639 INFO L93 Difference]: Finished difference Result 17867 states and 50700 transitions. [2021-08-12 18:53:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:53:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 35 [2021-08-12 18:53:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:41,686 INFO L225 Difference]: With dead ends: 17867 [2021-08-12 18:53:41,686 INFO L226 Difference]: Without dead ends: 15289 [2021-08-12 18:53:41,692 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-08-12 18:53:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-08-12 18:53:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14996 states, 14995 states have (on average 2.8635545181727244) internal successors, (42939), 14995 states have internal predecessors, (42939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-08-12 18:53:42,859 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-08-12 18:53:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:42,859 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-08-12 18:53:42,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-08-12 18:53:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-08-12 18:53:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:42,867 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:42,867 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:43,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-12 18:53:43,067 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-08-12 18:53:43,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:43,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418263563] [2021-08-12 18:53:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:53:43,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:43,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418263563] [2021-08-12 18:53:43,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418263563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:43,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837614722] [2021-08-12 18:53:43,120 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:43,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 18:53:43,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:53:43,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837614722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:43,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:43,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 18:53:43,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273440537] [2021-08-12 18:53:43,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:53:43,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:43,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:53:43,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:53:43,210 INFO L87 Difference]: Start difference. First operand 14996 states and 42939 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:46,865 INFO L93 Difference]: Finished difference Result 17523 states and 49511 transitions. [2021-08-12 18:53:46,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:53:46,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:46,916 INFO L225 Difference]: With dead ends: 17523 [2021-08-12 18:53:46,916 INFO L226 Difference]: Without dead ends: 15793 [2021-08-12 18:53:46,925 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-08-12 18:53:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-08-12 18:53:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15263 states, 15262 states have (on average 2.8567029222906566) internal successors, (43599), 15262 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-08-12 18:53:48,158 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-08-12 18:53:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:48,158 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-08-12 18:53:48,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-08-12 18:53:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:48,165 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:48,165 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:48,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-12 18:53:48,366 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-08-12 18:53:48,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:48,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786794213] [2021-08-12 18:53:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:48,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:48,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786794213] [2021-08-12 18:53:48,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786794213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:48,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365652804] [2021-08-12 18:53:48,417 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:48,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 18:53:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:48,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365652804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:48,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:48,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:53:48,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578449367] [2021-08-12 18:53:48,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:53:48,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:53:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:53:48,503 INFO L87 Difference]: Start difference. First operand 15263 states and 43599 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:52,564 INFO L93 Difference]: Finished difference Result 18323 states and 51301 transitions. [2021-08-12 18:53:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:53:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:52,613 INFO L225 Difference]: With dead ends: 18323 [2021-08-12 18:53:52,613 INFO L226 Difference]: Without dead ends: 16247 [2021-08-12 18:53:52,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:53:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-08-12 18:53:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-08-12 18:53:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14972 states, 14971 states have (on average 2.854652327833812) internal successors, (42737), 14971 states have internal predecessors, (42737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-08-12 18:53:53,956 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-08-12 18:53:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:53,957 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-08-12 18:53:53,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-08-12 18:53:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:53,963 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:53,963 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:54,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:54,164 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-08-12 18:53:54,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:54,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582659531] [2021-08-12 18:53:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:54,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582659531] [2021-08-12 18:53:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582659531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:54,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724831321] [2021-08-12 18:53:54,210 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:53:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:54,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724831321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:54,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:54,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 18:53:54,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704937028] [2021-08-12 18:53:54,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:53:54,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:53:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:53:54,285 INFO L87 Difference]: Start difference. First operand 14972 states and 42737 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:57,785 INFO L93 Difference]: Finished difference Result 15292 states and 43296 transitions. [2021-08-12 18:53:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:53:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 35 [2021-08-12 18:53:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:57,835 INFO L225 Difference]: With dead ends: 15292 [2021-08-12 18:53:57,835 INFO L226 Difference]: Without dead ends: 15235 [2021-08-12 18:53:57,839 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-08-12 18:53:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-08-12 18:53:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.861078178394588) internal successors, (41025), 14339 states have internal predecessors, (41025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-08-12 18:53:59,015 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-08-12 18:53:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:59,015 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-08-12 18:53:59,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-08-12 18:53:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:53:59,021 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:59,022 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:59,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-12 18:53:59,222 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:59,222 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-08-12 18:53:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:59,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259385607] [2021-08-12 18:53:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:53:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259385607] [2021-08-12 18:53:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259385607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30889791] [2021-08-12 18:53:59,273 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:59,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 18:53:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:53:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:53:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30889791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:59,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:59,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 18:53:59,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026227509] [2021-08-12 18:53:59,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:53:59,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:53:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:53:59,351 INFO L87 Difference]: Start difference. First operand 14340 states and 41025 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:03,327 INFO L93 Difference]: Finished difference Result 23588 states and 67517 transitions. [2021-08-12 18:54:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:54:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:03,376 INFO L225 Difference]: With dead ends: 23588 [2021-08-12 18:54:03,377 INFO L226 Difference]: Without dead ends: 15273 [2021-08-12 18:54:03,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:54:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-08-12 18:54:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-08-12 18:54:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.8478603218076) internal successors, (41593), 14605 states have internal predecessors, (41593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-08-12 18:54:04,595 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-08-12 18:54:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:04,596 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-08-12 18:54:04,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-08-12 18:54:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:04,602 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:04,602 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:04,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:04,803 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-08-12 18:54:04,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:04,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144014361] [2021-08-12 18:54:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:54:04,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144014361] [2021-08-12 18:54:04,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144014361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988741371] [2021-08-12 18:54:04,852 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:04,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:54:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:04,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:54:04,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:54:04,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988741371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:04,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:04,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:54:04,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513341763] [2021-08-12 18:54:04,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:54:04,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:54:04,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:54:04,945 INFO L87 Difference]: Start difference. First operand 14606 states and 41593 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-08-12 18:54:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:08,842 INFO L93 Difference]: Finished difference Result 22840 states and 64976 transitions. [2021-08-12 18:54:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:54:08,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 35 [2021-08-12 18:54:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:08,890 INFO L225 Difference]: With dead ends: 22840 [2021-08-12 18:54:08,890 INFO L226 Difference]: Without dead ends: 13783 [2021-08-12 18:54:08,904 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:54:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-08-12 18:54:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-08-12 18:54:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13424 states, 13423 states have (on average 2.8016091782760935) internal successors, (37606), 13423 states have internal predecessors, (37606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-08-12 18:54:10,160 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-08-12 18:54:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:10,160 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-08-12 18:54:10,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-08-12 18:54:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-08-12 18:54:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:10,167 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:10,167 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:10,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:10,367 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-08-12 18:54:10,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:10,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252729655] [2021-08-12 18:54:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:54:10,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:10,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252729655] [2021-08-12 18:54:10,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252729655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:10,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017490793] [2021-08-12 18:54:10,405 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:10,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 18:54:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:54:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:54:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017490793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 18:54:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646113999] [2021-08-12 18:54:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:54:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:54:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:54:10,488 INFO L87 Difference]: Start difference. First operand 13424 states and 37606 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:14,313 INFO L93 Difference]: Finished difference Result 14043 states and 38734 transitions. [2021-08-12 18:54:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:54:14,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:14,364 INFO L225 Difference]: With dead ends: 14043 [2021-08-12 18:54:14,364 INFO L226 Difference]: Without dead ends: 13986 [2021-08-12 18:54:14,368 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:54:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-08-12 18:54:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-08-12 18:54:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 13394 states have (on average 2.7938629236971777) internal successors, (37421), 13394 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-08-12 18:54:15,648 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-08-12 18:54:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:15,649 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-08-12 18:54:15,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-08-12 18:54:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:15,654 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:15,655 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:15,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:15,855 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-08-12 18:54:15,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:15,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386859604] [2021-08-12 18:54:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:15,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:15,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386859604] [2021-08-12 18:54:15,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386859604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:15,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108021799] [2021-08-12 18:54:15,906 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:15,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:54:15,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:54:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:15,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108021799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:15,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:15,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 18:54:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432880761] [2021-08-12 18:54:15,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:54:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:54:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:54:15,983 INFO L87 Difference]: Start difference. First operand 13395 states and 37421 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:19,915 INFO L93 Difference]: Finished difference Result 14023 states and 38559 transitions. [2021-08-12 18:54:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:54:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:19,963 INFO L225 Difference]: With dead ends: 14023 [2021-08-12 18:54:19,963 INFO L226 Difference]: Without dead ends: 13963 [2021-08-12 18:54:19,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:54:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-08-12 18:54:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-08-12 18:54:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 2.7947937525030038) internal successors, (34893), 12485 states have internal predecessors, (34893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-08-12 18:54:21,100 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-08-12 18:54:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:21,100 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-08-12 18:54:21,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-08-12 18:54:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:21,106 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:21,106 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:21,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-12 18:54:21,306 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-08-12 18:54:21,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:21,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962822119] [2021-08-12 18:54:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:54:21,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962822119] [2021-08-12 18:54:21,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962822119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554481817] [2021-08-12 18:54:21,447 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:21,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 18:54:21,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:21,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:54:21,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:54:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554481817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:21,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:21,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:54:21,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914246451] [2021-08-12 18:54:21,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:54:21,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:54:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:54:21,524 INFO L87 Difference]: Start difference. First operand 12486 states and 34893 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:25,806 INFO L93 Difference]: Finished difference Result 19374 states and 54130 transitions. [2021-08-12 18:54:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:54:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:25,849 INFO L225 Difference]: With dead ends: 19374 [2021-08-12 18:54:25,849 INFO L226 Difference]: Without dead ends: 12852 [2021-08-12 18:54:25,858 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:54:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-08-12 18:54:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-08-12 18:54:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 2.787057010785824) internal successors, (27132), 9735 states have internal predecessors, (27132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-08-12 18:54:26,881 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-08-12 18:54:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:26,881 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-08-12 18:54:26,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-08-12 18:54:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:26,885 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:26,885 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:27,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:27,090 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-08-12 18:54:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:27,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332798282] [2021-08-12 18:54:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:54:27,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:27,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332798282] [2021-08-12 18:54:27,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332798282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:27,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737709807] [2021-08-12 18:54:27,141 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:27,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:54:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:54:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:54:27,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737709807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:27,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:27,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 18:54:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304431927] [2021-08-12 18:54:27,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:54:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:54:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:54:27,228 INFO L87 Difference]: Start difference. First operand 9736 states and 27132 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:30,615 INFO L93 Difference]: Finished difference Result 10155 states and 27859 transitions. [2021-08-12 18:54:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:54:30,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:30,656 INFO L225 Difference]: With dead ends: 10155 [2021-08-12 18:54:30,656 INFO L226 Difference]: Without dead ends: 10101 [2021-08-12 18:54:30,658 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:54:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-08-12 18:54:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-08-12 18:54:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 2.7809553095530957) internal successors, (27131), 9756 states have internal predecessors, (27131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-08-12 18:54:31,726 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-08-12 18:54:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:31,727 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-08-12 18:54:31,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-08-12 18:54:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:31,731 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:31,731 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:31,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-08-12 18:54:31,932 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-08-12 18:54:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:31,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336950250] [2021-08-12 18:54:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:31,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:31,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336950250] [2021-08-12 18:54:31,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336950250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:31,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933074405] [2021-08-12 18:54:31,986 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:32,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 18:54:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:54:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:32,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933074405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:32,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:32,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:54:32,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288848415] [2021-08-12 18:54:32,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:54:32,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:54:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:54:32,067 INFO L87 Difference]: Start difference. First operand 9757 states and 27131 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:35,509 INFO L93 Difference]: Finished difference Result 10488 states and 28779 transitions. [2021-08-12 18:54:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:54:35,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:35,549 INFO L225 Difference]: With dead ends: 10488 [2021-08-12 18:54:35,549 INFO L226 Difference]: Without dead ends: 10431 [2021-08-12 18:54:35,551 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:54:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-08-12 18:54:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-08-12 18:54:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 2.7968101376447456) internal successors, (25602), 9154 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-08-12 18:54:36,529 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-08-12 18:54:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:36,530 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-08-12 18:54:36,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-08-12 18:54:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:36,534 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:36,534 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:36,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-12 18:54:36,735 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-08-12 18:54:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:36,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826360748] [2021-08-12 18:54:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-12 18:54:36,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:36,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826360748] [2021-08-12 18:54:36,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826360748] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:54:36,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:54:36,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:54:36,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812806478] [2021-08-12 18:54:36,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:54:36,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:54:36,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:54:36,745 INFO L87 Difference]: Start difference. First operand 9155 states and 25602 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-12 18:54:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:38,253 INFO L93 Difference]: Finished difference Result 10551 states and 29212 transitions. [2021-08-12 18:54:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:54:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 35 [2021-08-12 18:54:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:38,286 INFO L225 Difference]: With dead ends: 10551 [2021-08-12 18:54:38,287 INFO L226 Difference]: Without dead ends: 2331 [2021-08-12 18:54:38,295 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:54:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-12 18:54:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-08-12 18:54:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-08-12 18:54:38,700 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-08-12 18:54:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:38,701 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-08-12 18:54:38,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-12 18:54:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-08-12 18:54:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:38,702 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:38,702 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:38,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-08-12 18:54:38,702 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:38,703 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-08-12 18:54:38,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:38,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493150815] [2021-08-12 18:54:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:38,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493150815] [2021-08-12 18:54:38,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493150815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683239638] [2021-08-12 18:54:38,777 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:38,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:54:38,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:54:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:38,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683239638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:38,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:38,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 18:54:38,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030608630] [2021-08-12 18:54:38,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:54:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:54:38,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:54:38,912 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:40,388 INFO L93 Difference]: Finished difference Result 1468 states and 3372 transitions. [2021-08-12 18:54:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:54:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:40,410 INFO L225 Difference]: With dead ends: 1468 [2021-08-12 18:54:40,410 INFO L226 Difference]: Without dead ends: 1397 [2021-08-12 18:54:40,410 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:54:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-08-12 18:54:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-08-12 18:54:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-08-12 18:54:40,799 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-08-12 18:54:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:40,799 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-08-12 18:54:40,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-08-12 18:54:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:40,800 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:40,800 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:41,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-12 18:54:41,016 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-08-12 18:54:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:41,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946256682] [2021-08-12 18:54:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:41,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:41,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946256682] [2021-08-12 18:54:41,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946256682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:41,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662077340] [2021-08-12 18:54:41,064 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:41,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 18:54:41,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:41,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:54:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662077340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:41,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:41,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 18:54:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354907509] [2021-08-12 18:54:41,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:54:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:54:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:54:41,146 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:43,444 INFO L93 Difference]: Finished difference Result 2098 states and 4769 transitions. [2021-08-12 18:54:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:54:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:43,470 INFO L225 Difference]: With dead ends: 2098 [2021-08-12 18:54:43,471 INFO L226 Difference]: Without dead ends: 2071 [2021-08-12 18:54:43,471 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:54:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-08-12 18:54:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-08-12 18:54:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-08-12 18:54:43,873 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-08-12 18:54:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:43,874 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-08-12 18:54:43,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-08-12 18:54:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:43,875 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:43,875 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:44,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:44,076 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-08-12 18:54:44,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:44,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947766527] [2021-08-12 18:54:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:44,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947766527] [2021-08-12 18:54:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947766527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164470083] [2021-08-12 18:54:44,132 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:44,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:54:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:44,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164470083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:44,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:44,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:54:44,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377887791] [2021-08-12 18:54:44,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:54:44,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:54:44,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:54:44,206 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:46,030 INFO L93 Difference]: Finished difference Result 1954 states and 4538 transitions. [2021-08-12 18:54:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:54:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:46,054 INFO L225 Difference]: With dead ends: 1954 [2021-08-12 18:54:46,055 INFO L226 Difference]: Without dead ends: 1905 [2021-08-12 18:54:46,055 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:54:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-08-12 18:54:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-08-12 18:54:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-08-12 18:54:46,455 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-08-12 18:54:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:46,456 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-08-12 18:54:46,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-08-12 18:54:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:46,457 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:46,457 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:46,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:46,658 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:46,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:46,658 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-08-12 18:54:46,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:46,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387890989] [2021-08-12 18:54:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:46,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:46,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387890989] [2021-08-12 18:54:46,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387890989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:46,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284392848] [2021-08-12 18:54:46,713 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:46,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:54:46,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:54:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:46,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284392848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:46,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:46,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 18:54:46,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118219887] [2021-08-12 18:54:46,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:54:46,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:46,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:54:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:54:46,841 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:48,247 INFO L93 Difference]: Finished difference Result 1602 states and 3797 transitions. [2021-08-12 18:54:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:54:48,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:48,268 INFO L225 Difference]: With dead ends: 1602 [2021-08-12 18:54:48,269 INFO L226 Difference]: Without dead ends: 1543 [2021-08-12 18:54:48,269 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:54:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-08-12 18:54:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-08-12 18:54:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-08-12 18:54:48,674 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-08-12 18:54:48,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:48,674 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-08-12 18:54:48,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-08-12 18:54:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:48,676 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:48,676 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:48,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-08-12 18:54:48,877 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-08-12 18:54:48,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:48,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537252278] [2021-08-12 18:54:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:48,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537252278] [2021-08-12 18:54:48,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537252278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113432911] [2021-08-12 18:54:48,929 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:48,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 18:54:48,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:54:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:49,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113432911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:49,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:49,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-08-12 18:54:49,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615900056] [2021-08-12 18:54:49,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:54:49,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:54:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:54:49,014 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:51,968 INFO L93 Difference]: Finished difference Result 2439 states and 5553 transitions. [2021-08-12 18:54:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:54:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:51,993 INFO L225 Difference]: With dead ends: 2439 [2021-08-12 18:54:51,994 INFO L226 Difference]: Without dead ends: 2415 [2021-08-12 18:54:51,994 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:54:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-08-12 18:54:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-08-12 18:54:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-08-12 18:54:52,433 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-08-12 18:54:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:52,433 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-08-12 18:54:52,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-08-12 18:54:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:52,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:52,435 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:52,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:52,636 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-08-12 18:54:52,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:52,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609381177] [2021-08-12 18:54:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:52,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:52,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609381177] [2021-08-12 18:54:52,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609381177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:52,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992251903] [2021-08-12 18:54:52,689 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:52,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:54:52,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 18:54:52,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992251903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:52,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:52,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 18:54:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862660093] [2021-08-12 18:54:52,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:54:52,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:52,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:54:52,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:54:52,768 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-12 18:54:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:55,773 INFO L93 Difference]: Finished difference Result 2695 states and 6294 transitions. [2021-08-12 18:54:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:54:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 35 [2021-08-12 18:54:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:55,798 INFO L225 Difference]: With dead ends: 2695 [2021-08-12 18:54:55,798 INFO L226 Difference]: Without dead ends: 2596 [2021-08-12 18:54:55,798 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:54:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-12 18:54:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-08-12 18:54:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-08-12 18:54:56,424 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-08-12 18:54:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:56,425 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-08-12 18:54:56,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-12 18:54:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-08-12 18:54:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:54:56,427 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:56,427 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:56,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:56,627 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-08-12 18:54:56,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:56,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668019528] [2021-08-12 18:54:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:56,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:56,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668019528] [2021-08-12 18:54:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668019528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:56,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470308178] [2021-08-12 18:54:56,667 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:56,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 18:54:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:56,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:54:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:54:56,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470308178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:56,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:56,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 18:54:56,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786668500] [2021-08-12 18:54:56,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:54:56,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:54:56,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:54:56,750 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:59,873 INFO L93 Difference]: Finished difference Result 2432 states and 5603 transitions. [2021-08-12 18:54:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:54:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 35 [2021-08-12 18:54:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:59,897 INFO L225 Difference]: With dead ends: 2432 [2021-08-12 18:54:59,897 INFO L226 Difference]: Without dead ends: 2405 [2021-08-12 18:54:59,897 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:54:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-08-12 18:55:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-08-12 18:55:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-08-12 18:55:00,492 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-08-12 18:55:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:00,492 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-08-12 18:55:00,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-08-12 18:55:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:00,494 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:00,494 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:00,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:00,701 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-08-12 18:55:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:00,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214906947] [2021-08-12 18:55:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:55:00,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:00,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214906947] [2021-08-12 18:55:00,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214906947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:00,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433061670] [2021-08-12 18:55:00,743 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:55:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:55:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433061670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:00,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:00,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 18:55:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557760672] [2021-08-12 18:55:00,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:55:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:55:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:55:00,817 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:04,242 INFO L93 Difference]: Finished difference Result 2635 states and 6155 transitions. [2021-08-12 18:55:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:55:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:04,266 INFO L225 Difference]: With dead ends: 2635 [2021-08-12 18:55:04,266 INFO L226 Difference]: Without dead ends: 2596 [2021-08-12 18:55:04,267 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:55:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-12 18:55:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-08-12 18:55:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-08-12 18:55:04,954 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-08-12 18:55:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:04,955 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-08-12 18:55:04,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-08-12 18:55:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:04,957 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:04,957 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:05,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:05,157 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-08-12 18:55:05,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:05,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738787356] [2021-08-12 18:55:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:05,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738787356] [2021-08-12 18:55:05,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738787356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330669321] [2021-08-12 18:55:05,226 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:05,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:55:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:55:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:05,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330669321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:05,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:05,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:55:05,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057806529] [2021-08-12 18:55:05,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:55:05,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:05,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:55:05,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:55:05,347 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:08,577 INFO L93 Difference]: Finished difference Result 2439 states and 5714 transitions. [2021-08-12 18:55:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:55:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:08,601 INFO L225 Difference]: With dead ends: 2439 [2021-08-12 18:55:08,602 INFO L226 Difference]: Without dead ends: 2298 [2021-08-12 18:55:08,602 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:55:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-12 18:55:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-08-12 18:55:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-08-12 18:55:09,277 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-08-12 18:55:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:09,277 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-08-12 18:55:09,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-08-12 18:55:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:09,279 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:09,279 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:09,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-12 18:55:09,485 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-08-12 18:55:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:09,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489350375] [2021-08-12 18:55:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:55:09,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489350375] [2021-08-12 18:55:09,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489350375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:09,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461370686] [2021-08-12 18:55:09,538 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:09,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 18:55:09,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:09,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:55:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:55:09,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461370686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:09,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:09,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 18:55:09,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816867153] [2021-08-12 18:55:09,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:55:09,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:55:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:55:09,616 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:12,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:12,792 INFO L93 Difference]: Finished difference Result 2431 states and 5769 transitions. [2021-08-12 18:55:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:55:12,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:12,815 INFO L225 Difference]: With dead ends: 2431 [2021-08-12 18:55:12,815 INFO L226 Difference]: Without dead ends: 2380 [2021-08-12 18:55:12,815 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:55:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-12 18:55:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-08-12 18:55:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-08-12 18:55:13,515 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-08-12 18:55:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:13,515 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-08-12 18:55:13,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-08-12 18:55:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:13,517 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:13,517 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:13,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:13,729 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-08-12 18:55:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:13,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184470347] [2021-08-12 18:55:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:13,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:13,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184470347] [2021-08-12 18:55:13,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184470347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:13,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285408035] [2021-08-12 18:55:13,783 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:13,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:55:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:55:13,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:13,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285408035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:13,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:13,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:55:13,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299727951] [2021-08-12 18:55:13,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:55:13,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:55:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:55:13,861 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:18,654 INFO L93 Difference]: Finished difference Result 3095 states and 7211 transitions. [2021-08-12 18:55:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:55:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:18,678 INFO L225 Difference]: With dead ends: 3095 [2021-08-12 18:55:18,678 INFO L226 Difference]: Without dead ends: 3002 [2021-08-12 18:55:18,679 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:55:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-08-12 18:55:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-08-12 18:55:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-08-12 18:55:19,412 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-08-12 18:55:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:19,412 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-08-12 18:55:19,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-08-12 18:55:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:19,414 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:19,414 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:19,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:19,615 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:19,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-08-12 18:55:19,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:19,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744874585] [2021-08-12 18:55:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:55:19,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744874585] [2021-08-12 18:55:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744874585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368855749] [2021-08-12 18:55:19,661 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:19,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 18:55:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:55:19,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:19,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368855749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:19,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:19,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-12 18:55:19,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018844901] [2021-08-12 18:55:19,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:55:19,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:55:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:55:19,762 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:24,058 INFO L93 Difference]: Finished difference Result 2916 states and 6740 transitions. [2021-08-12 18:55:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:55:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:24,080 INFO L225 Difference]: With dead ends: 2916 [2021-08-12 18:55:24,080 INFO L226 Difference]: Without dead ends: 2865 [2021-08-12 18:55:24,080 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:55:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-08-12 18:55:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-08-12 18:55:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-08-12 18:55:24,773 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-08-12 18:55:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:24,774 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-08-12 18:55:24,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-08-12 18:55:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:24,776 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:24,776 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:24,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-12 18:55:24,976 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-08-12 18:55:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:24,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230033006] [2021-08-12 18:55:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230033006] [2021-08-12 18:55:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230033006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964745194] [2021-08-12 18:55:25,030 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:25,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 18:55:25,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:55:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:25,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964745194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:25,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:25,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:55:25,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540048762] [2021-08-12 18:55:25,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:55:25,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:55:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:55:25,114 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:30,625 INFO L93 Difference]: Finished difference Result 3833 states and 9006 transitions. [2021-08-12 18:55:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:55:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:30,651 INFO L225 Difference]: With dead ends: 3833 [2021-08-12 18:55:30,651 INFO L226 Difference]: Without dead ends: 3680 [2021-08-12 18:55:30,652 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-08-12 18:55:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-08-12 18:55:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-08-12 18:55:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-08-12 18:55:31,412 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-08-12 18:55:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:31,412 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-08-12 18:55:31,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-08-12 18:55:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:31,414 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:31,414 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:31,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:31,618 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-08-12 18:55:31,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:31,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799905042] [2021-08-12 18:55:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:55:31,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:31,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799905042] [2021-08-12 18:55:31,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799905042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:31,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603375651] [2021-08-12 18:55:31,672 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:55:31,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:55:31,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603375651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:31,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:31,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 18:55:31,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557120892] [2021-08-12 18:55:31,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:55:31,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:55:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:55:31,762 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:36,011 INFO L93 Difference]: Finished difference Result 3012 states and 6971 transitions. [2021-08-12 18:55:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:55:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:36,036 INFO L225 Difference]: With dead ends: 3012 [2021-08-12 18:55:36,036 INFO L226 Difference]: Without dead ends: 2949 [2021-08-12 18:55:36,037 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:55:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-08-12 18:55:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-08-12 18:55:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-08-12 18:55:36,862 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-08-12 18:55:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:36,862 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-08-12 18:55:36,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-08-12 18:55:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:36,865 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:36,865 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:37,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:37,067 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:37,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-08-12 18:55:37,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:37,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312732069] [2021-08-12 18:55:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:37,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:37,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312732069] [2021-08-12 18:55:37,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312732069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325677715] [2021-08-12 18:55:37,130 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:37,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:55:37,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 18:55:37,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:37,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325677715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:37,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:37,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 18:55:37,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417524335] [2021-08-12 18:55:37,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:55:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:55:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:55:37,205 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:41,530 INFO L93 Difference]: Finished difference Result 3076 states and 7388 transitions. [2021-08-12 18:55:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:55:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:41,558 INFO L225 Difference]: With dead ends: 3076 [2021-08-12 18:55:41,558 INFO L226 Difference]: Without dead ends: 2881 [2021-08-12 18:55:41,558 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:55:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-08-12 18:55:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-08-12 18:55:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-08-12 18:55:42,307 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-08-12 18:55:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:42,307 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-08-12 18:55:42,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-08-12 18:55:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:42,309 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:42,309 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:42,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:42,511 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-08-12 18:55:42,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:42,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735792105] [2021-08-12 18:55:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:42,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:42,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735792105] [2021-08-12 18:55:42,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735792105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:42,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994713061] [2021-08-12 18:55:42,552 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:42,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 18:55:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:55:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:42,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994713061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:42,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:42,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-08-12 18:55:42,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447049663] [2021-08-12 18:55:42,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:55:42,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:42,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:55:42,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:55:42,632 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:46,474 INFO L93 Difference]: Finished difference Result 2871 states and 6758 transitions. [2021-08-12 18:55:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:55:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:46,499 INFO L225 Difference]: With dead ends: 2871 [2021-08-12 18:55:46,499 INFO L226 Difference]: Without dead ends: 2832 [2021-08-12 18:55:46,500 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:55:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-08-12 18:55:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-08-12 18:55:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-08-12 18:55:47,273 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-08-12 18:55:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:47,274 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-08-12 18:55:47,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-08-12 18:55:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:47,275 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:47,276 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:47,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-08-12 18:55:47,476 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-08-12 18:55:47,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:47,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430391989] [2021-08-12 18:55:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:55:47,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:47,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430391989] [2021-08-12 18:55:47,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430391989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:47,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519197122] [2021-08-12 18:55:47,525 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:47,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:55:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:47,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:55:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:55:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519197122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:47,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:47,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-08-12 18:55:47,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696263066] [2021-08-12 18:55:47,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:55:47,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:55:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:55:47,617 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:51,881 INFO L93 Difference]: Finished difference Result 2862 states and 6779 transitions. [2021-08-12 18:55:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:55:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:51,907 INFO L225 Difference]: With dead ends: 2862 [2021-08-12 18:55:51,907 INFO L226 Difference]: Without dead ends: 2847 [2021-08-12 18:55:51,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:55:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-08-12 18:55:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-08-12 18:55:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-08-12 18:55:52,771 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-08-12 18:55:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:52,771 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-08-12 18:55:52,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-08-12 18:55:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 18:55:52,773 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:52,773 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:52,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:52,974 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:52,974 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-08-12 18:55:52,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:52,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578893995] [2021-08-12 18:55:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:53,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:53,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578893995] [2021-08-12 18:55:53,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578893995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:53,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180305870] [2021-08-12 18:55:53,091 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:53,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:55:53,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:55:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:53,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180305870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:53,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:53,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-12 18:55:53,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973697299] [2021-08-12 18:55:53,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:55:53,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:55:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:55:53,174 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:56,851 INFO L93 Difference]: Finished difference Result 2690 states and 6321 transitions. [2021-08-12 18:55:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:55:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-12 18:55:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:56,885 INFO L225 Difference]: With dead ends: 2690 [2021-08-12 18:55:56,886 INFO L226 Difference]: Without dead ends: 2616 [2021-08-12 18:55:56,886 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:55:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-08-12 18:55:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-08-12 18:55:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-08-12 18:55:57,866 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-08-12 18:55:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:57,866 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-08-12 18:55:57,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-08-12 18:55:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 18:55:57,869 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:57,869 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:58,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:58,070 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:58,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-08-12 18:55:58,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:58,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828889247] [2021-08-12 18:55:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:55:58,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828889247] [2021-08-12 18:55:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828889247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58674424] [2021-08-12 18:55:58,114 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:58,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:55:58,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:55:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58674424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:58,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:58,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-08-12 18:55:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265268164] [2021-08-12 18:55:58,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:55:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:55:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:55:58,322 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:03,818 INFO L93 Difference]: Finished difference Result 3612 states and 8329 transitions. [2021-08-12 18:56:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 18:56:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 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 38 [2021-08-12 18:56:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:03,843 INFO L225 Difference]: With dead ends: 3612 [2021-08-12 18:56:03,844 INFO L226 Difference]: Without dead ends: 3550 [2021-08-12 18:56:03,844 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 18:56:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-08-12 18:56:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-08-12 18:56:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-08-12 18:56:04,826 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-08-12 18:56:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:04,826 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-08-12 18:56:04,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-08-12 18:56:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 18:56:04,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:04,829 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:05,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:05,031 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-08-12 18:56:05,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:05,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843312843] [2021-08-12 18:56:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-12 18:56:05,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843312843] [2021-08-12 18:56:05,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843312843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775758480] [2021-08-12 18:56:05,071 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:05,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 18:56:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:05,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 18:56:05,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-12 18:56:05,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775758480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:05,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:05,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-12 18:56:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156672124] [2021-08-12 18:56:05,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:56:05,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:56:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:56:05,150 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:09,270 INFO L93 Difference]: Finished difference Result 3226 states and 7685 transitions. [2021-08-12 18:56:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:56:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 38 [2021-08-12 18:56:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:09,296 INFO L225 Difference]: With dead ends: 3226 [2021-08-12 18:56:09,296 INFO L226 Difference]: Without dead ends: 3189 [2021-08-12 18:56:09,296 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:56:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-08-12 18:56:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-08-12 18:56:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-08-12 18:56:10,345 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-08-12 18:56:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:10,346 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-08-12 18:56:10,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-08-12 18:56:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 18:56:10,349 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:10,349 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:10,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-12 18:56:10,549 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-08-12 18:56:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:10,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425789208] [2021-08-12 18:56:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-12 18:56:10,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425789208] [2021-08-12 18:56:10,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425789208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238410793] [2021-08-12 18:56:10,586 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:10,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 18:56:10,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:56:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:56:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238410793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:10,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:10,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-12 18:56:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321750270] [2021-08-12 18:56:10,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:56:10,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:56:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:56:10,719 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:17,957 INFO L93 Difference]: Finished difference Result 4491 states and 10204 transitions. [2021-08-12 18:56:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 18:56:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 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 38 [2021-08-12 18:56:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:17,982 INFO L225 Difference]: With dead ends: 4491 [2021-08-12 18:56:17,982 INFO L226 Difference]: Without dead ends: 4401 [2021-08-12 18:56:17,983 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:56:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-08-12 18:56:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-08-12 18:56:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-08-12 18:56:19,030 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-08-12 18:56:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:19,030 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-08-12 18:56:19,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-08-12 18:56:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 18:56:19,033 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:19,033 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:19,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:19,234 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-08-12 18:56:19,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:19,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244465997] [2021-08-12 18:56:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:56:19,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244465997] [2021-08-12 18:56:19,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244465997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378708855] [2021-08-12 18:56:19,271 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 18:56:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:56:19,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378708855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:19,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:19,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-12 18:56:19,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964407677] [2021-08-12 18:56:19,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:56:19,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:19,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:56:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:56:19,344 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:24,538 INFO L93 Difference]: Finished difference Result 3619 states and 8706 transitions. [2021-08-12 18:56:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:56:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 38 [2021-08-12 18:56:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:24,565 INFO L225 Difference]: With dead ends: 3619 [2021-08-12 18:56:24,565 INFO L226 Difference]: Without dead ends: 3592 [2021-08-12 18:56:24,565 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:56:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-08-12 18:56:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-08-12 18:56:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-08-12 18:56:25,915 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-08-12 18:56:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:25,916 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-08-12 18:56:25,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-08-12 18:56:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:56:25,919 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:25,919 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-12 18:56:26,120 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-08-12 18:56:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495376507] [2021-08-12 18:56:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:26,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:26,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495376507] [2021-08-12 18:56:26,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495376507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:26,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762693517] [2021-08-12 18:56:26,200 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:26,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 18:56:26,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:56:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:26,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762693517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:26,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:26,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-12 18:56:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447496679] [2021-08-12 18:56:26,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:56:26,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:56:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:56:26,288 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:32,345 INFO L93 Difference]: Finished difference Result 4282 states and 10214 transitions. [2021-08-12 18:56:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:56:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2021-08-12 18:56:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:32,371 INFO L225 Difference]: With dead ends: 4282 [2021-08-12 18:56:32,371 INFO L226 Difference]: Without dead ends: 4189 [2021-08-12 18:56:32,371 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:56:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-12 18:56:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-08-12 18:56:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-08-12 18:56:33,703 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-08-12 18:56:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:33,703 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-08-12 18:56:33,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-08-12 18:56:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:56:33,707 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:33,707 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:33,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:33,907 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-08-12 18:56:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:33,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913391412] [2021-08-12 18:56:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:33,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:33,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913391412] [2021-08-12 18:56:33,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913391412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:33,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990565223] [2021-08-12 18:56:34,000 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:34,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:56:34,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:56:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:34,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990565223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:34,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:34,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-12 18:56:34,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109341612] [2021-08-12 18:56:34,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:56:34,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:34,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:56:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:56:34,193 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:39,336 INFO L93 Difference]: Finished difference Result 3366 states and 8127 transitions. [2021-08-12 18:56:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:56:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 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 41 [2021-08-12 18:56:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:39,363 INFO L225 Difference]: With dead ends: 3366 [2021-08-12 18:56:39,364 INFO L226 Difference]: Without dead ends: 3236 [2021-08-12 18:56:39,364 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:56:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-08-12 18:56:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-08-12 18:56:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-08-12 18:56:40,754 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-08-12 18:56:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:40,754 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-08-12 18:56:40,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-08-12 18:56:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:56:40,757 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:40,757 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:40,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-12 18:56:40,958 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-08-12 18:56:40,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:40,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133407428] [2021-08-12 18:56:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:56:41,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133407428] [2021-08-12 18:56:41,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133407428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125645407] [2021-08-12 18:56:41,025 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:41,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 18:56:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:41,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:56:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:56:41,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125645407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:41,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:41,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:56:41,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634505603] [2021-08-12 18:56:41,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:56:41,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:41,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:56:41,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:56:41,128 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:46,184 INFO L93 Difference]: Finished difference Result 3489 states and 8411 transitions. [2021-08-12 18:56:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:56:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 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 41 [2021-08-12 18:56:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:46,209 INFO L225 Difference]: With dead ends: 3489 [2021-08-12 18:56:46,210 INFO L226 Difference]: Without dead ends: 3450 [2021-08-12 18:56:46,210 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:56:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-08-12 18:56:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-08-12 18:56:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-08-12 18:56:47,477 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-08-12 18:56:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:47,477 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-08-12 18:56:47,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-08-12 18:56:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:56:47,480 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:47,480 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:47,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-12 18:56:47,681 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-08-12 18:56:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941489944] [2021-08-12 18:56:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:47,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941489944] [2021-08-12 18:56:47,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941489944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005034580] [2021-08-12 18:56:47,768 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:47,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 18:56:47,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:56:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:47,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005034580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:47,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:47,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-08-12 18:56:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947666780] [2021-08-12 18:56:47,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:56:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:56:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:56:47,869 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:55,428 INFO L93 Difference]: Finished difference Result 4344 states and 10279 transitions. [2021-08-12 18:56:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:56:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 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 41 [2021-08-12 18:56:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:55,453 INFO L225 Difference]: With dead ends: 4344 [2021-08-12 18:56:55,453 INFO L226 Difference]: Without dead ends: 4263 [2021-08-12 18:56:55,453 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:56:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-08-12 18:56:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-08-12 18:56:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-08-12 18:56:56,832 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-08-12 18:56:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:56,832 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-08-12 18:56:56,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-08-12 18:56:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:56:56,835 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:56,835 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:57,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-12 18:56:57,035 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-08-12 18:56:57,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:57,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765704084] [2021-08-12 18:56:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:56:57,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:57,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765704084] [2021-08-12 18:56:57,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765704084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:57,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396218956] [2021-08-12 18:56:57,086 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:56:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:57,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396218956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:57,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:57,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-08-12 18:56:57,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203014311] [2021-08-12 18:56:57,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:56:57,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:56:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:56:57,180 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:05,090 INFO L93 Difference]: Finished difference Result 4824 states and 11611 transitions. [2021-08-12 18:57:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:57:05,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 18:57:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:05,117 INFO L225 Difference]: With dead ends: 4824 [2021-08-12 18:57:05,117 INFO L226 Difference]: Without dead ends: 4797 [2021-08-12 18:57:05,117 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:57:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-08-12 18:57:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-08-12 18:57:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-08-12 18:57:06,596 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-08-12 18:57:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:06,596 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-08-12 18:57:06,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-08-12 18:57:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:06,599 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:06,600 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:06,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:06,800 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-08-12 18:57:06,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:06,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520683056] [2021-08-12 18:57:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:06,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520683056] [2021-08-12 18:57:06,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520683056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257322473] [2021-08-12 18:57:06,855 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:06,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:57:06,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:06,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:57:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:06,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257322473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:06,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:06,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 18:57:06,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011491889] [2021-08-12 18:57:06,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:57:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:57:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:57:06,951 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:11,852 INFO L93 Difference]: Finished difference Result 3760 states and 9291 transitions. [2021-08-12 18:57:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:57:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-08-12 18:57:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:11,877 INFO L225 Difference]: With dead ends: 3760 [2021-08-12 18:57:11,878 INFO L226 Difference]: Without dead ends: 3727 [2021-08-12 18:57:11,878 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:57:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-08-12 18:57:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-08-12 18:57:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-08-12 18:57:13,258 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-08-12 18:57:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:13,258 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-08-12 18:57:13,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-08-12 18:57:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:13,262 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:13,262 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:13,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-12 18:57:13,463 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-08-12 18:57:13,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:13,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021559884] [2021-08-12 18:57:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:57:13,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:13,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021559884] [2021-08-12 18:57:13,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021559884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:13,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628719668] [2021-08-12 18:57:13,525 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:13,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:57:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:57:13,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:57:13,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628719668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:13,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:13,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:57:13,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094382675] [2021-08-12 18:57:13,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:57:13,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:57:13,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:57:13,611 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:19,482 INFO L93 Difference]: Finished difference Result 4366 states and 10615 transitions. [2021-08-12 18:57:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:57:19,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-08-12 18:57:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:19,509 INFO L225 Difference]: With dead ends: 4366 [2021-08-12 18:57:19,509 INFO L226 Difference]: Without dead ends: 4278 [2021-08-12 18:57:19,510 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:57:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-08-12 18:57:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-08-12 18:57:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-08-12 18:57:20,937 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-08-12 18:57:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:20,937 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-08-12 18:57:20,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-08-12 18:57:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:20,941 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:20,941 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:21,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:21,142 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-08-12 18:57:21,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:21,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678857365] [2021-08-12 18:57:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:57:21,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:21,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678857365] [2021-08-12 18:57:21,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678857365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:21,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492729662] [2021-08-12 18:57:21,180 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:21,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 18:57:21,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:57:21,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:21,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492729662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:21,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:21,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-08-12 18:57:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572963937] [2021-08-12 18:57:21,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:57:21,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:57:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:57:21,284 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:27,877 INFO L93 Difference]: Finished difference Result 4445 states and 10697 transitions. [2021-08-12 18:57:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:57:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 41 [2021-08-12 18:57:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:27,904 INFO L225 Difference]: With dead ends: 4445 [2021-08-12 18:57:27,904 INFO L226 Difference]: Without dead ends: 4412 [2021-08-12 18:57:27,905 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:57:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-08-12 18:57:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-08-12 18:57:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-08-12 18:57:29,324 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-08-12 18:57:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:29,324 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-08-12 18:57:29,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-08-12 18:57:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:29,328 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:29,328 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:29,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-12 18:57:29,529 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:29,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-08-12 18:57:29,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:29,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089823284] [2021-08-12 18:57:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:57:29,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089823284] [2021-08-12 18:57:29,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089823284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482745946] [2021-08-12 18:57:29,579 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:29,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 18:57:29,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:57:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:57:29,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482745946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:29,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:29,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 18:57:29,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829887206] [2021-08-12 18:57:29,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:57:29,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:57:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:57:29,663 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-08-12 18:57:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:35,943 INFO L93 Difference]: Finished difference Result 4283 states and 10323 transitions. [2021-08-12 18:57:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:57:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 41 [2021-08-12 18:57:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:35,971 INFO L225 Difference]: With dead ends: 4283 [2021-08-12 18:57:35,972 INFO L226 Difference]: Without dead ends: 4235 [2021-08-12 18:57:35,972 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:57:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-08-12 18:57:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-08-12 18:57:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-08-12 18:57:37,390 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-08-12 18:57:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:37,390 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-08-12 18:57:37,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-08-12 18:57:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-08-12 18:57:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:37,394 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:37,394 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:37,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-12 18:57:37,596 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-08-12 18:57:37,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:37,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871563166] [2021-08-12 18:57:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:57:37,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871563166] [2021-08-12 18:57:37,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871563166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:37,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706911447] [2021-08-12 18:57:37,654 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:57:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:57:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706911447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 18:57:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097742179] [2021-08-12 18:57:37,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:57:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:57:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:57:37,756 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:43,509 INFO L93 Difference]: Finished difference Result 4116 states and 10055 transitions. [2021-08-12 18:57:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:57:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 18:57:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:43,538 INFO L225 Difference]: With dead ends: 4116 [2021-08-12 18:57:43,538 INFO L226 Difference]: Without dead ends: 4016 [2021-08-12 18:57:43,539 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:57:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-08-12 18:57:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-08-12 18:57:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-08-12 18:57:45,029 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-08-12 18:57:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:45,029 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-08-12 18:57:45,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-08-12 18:57:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:45,033 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:45,033 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:45,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-12 18:57:45,235 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:45,235 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-08-12 18:57:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:45,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596649805] [2021-08-12 18:57:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:57:45,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:45,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596649805] [2021-08-12 18:57:45,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596649805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:45,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126335783] [2021-08-12 18:57:45,298 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:45,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:57:45,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:45,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:57:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:57:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126335783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:45,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:45,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:57:45,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302782050] [2021-08-12 18:57:45,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:57:45,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:45,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:57:45,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:57:45,387 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:51,445 INFO L93 Difference]: Finished difference Result 4316 states and 10538 transitions. [2021-08-12 18:57:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:57:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 41 [2021-08-12 18:57:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:51,473 INFO L225 Difference]: With dead ends: 4316 [2021-08-12 18:57:51,473 INFO L226 Difference]: Without dead ends: 4247 [2021-08-12 18:57:51,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:57:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-08-12 18:57:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-08-12 18:57:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-08-12 18:57:52,995 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-08-12 18:57:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:52,995 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-08-12 18:57:52,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-08-12 18:57:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:57:53,000 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:53,000 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:53,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:53,200 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:53,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-08-12 18:57:53,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:53,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017132964] [2021-08-12 18:57:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:53,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017132964] [2021-08-12 18:57:53,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017132964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764417519] [2021-08-12 18:57:53,262 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:53,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 18:57:53,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:57:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:53,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764417519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:53,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:53,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:57:53,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52737236] [2021-08-12 18:57:53,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:57:53,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:53,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:57:53,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:57:53,356 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:00,852 INFO L93 Difference]: Finished difference Result 4652 states and 11259 transitions. [2021-08-12 18:58:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:58:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:00,881 INFO L225 Difference]: With dead ends: 4652 [2021-08-12 18:58:00,881 INFO L226 Difference]: Without dead ends: 4601 [2021-08-12 18:58:00,882 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-08-12 18:58:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-08-12 18:58:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-08-12 18:58:02,379 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-08-12 18:58:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:02,379 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-08-12 18:58:02,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-08-12 18:58:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:02,383 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:02,383 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:02,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:02,584 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-08-12 18:58:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:02,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091525948] [2021-08-12 18:58:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:58:02,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:02,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091525948] [2021-08-12 18:58:02,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091525948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:02,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902136048] [2021-08-12 18:58:02,628 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:02,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 18:58:02,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:58:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:02,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902136048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:02,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:02,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-08-12 18:58:02,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665317184] [2021-08-12 18:58:02,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:58:02,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:58:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:02,729 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:10,688 INFO L93 Difference]: Finished difference Result 4876 states and 11733 transitions. [2021-08-12 18:58:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:10,716 INFO L225 Difference]: With dead ends: 4876 [2021-08-12 18:58:10,716 INFO L226 Difference]: Without dead ends: 4847 [2021-08-12 18:58:10,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-08-12 18:58:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-08-12 18:58:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-08-12 18:58:12,206 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-08-12 18:58:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:12,207 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-08-12 18:58:12,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-08-12 18:58:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:12,210 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:12,210 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:12,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:12,411 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-08-12 18:58:12,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:12,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247473774] [2021-08-12 18:58:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:58:12,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:12,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247473774] [2021-08-12 18:58:12,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247473774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472037155] [2021-08-12 18:58:12,466 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:12,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:58:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:58:12,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472037155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:12,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-08-12 18:58:12,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687820852] [2021-08-12 18:58:12,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:58:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:58:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:12,568 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:21,899 INFO L93 Difference]: Finished difference Result 5522 states and 13235 transitions. [2021-08-12 18:58:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:21,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:21,930 INFO L225 Difference]: With dead ends: 5522 [2021-08-12 18:58:21,931 INFO L226 Difference]: Without dead ends: 5507 [2021-08-12 18:58:21,931 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-08-12 18:58:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-08-12 18:58:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-08-12 18:58:23,774 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-08-12 18:58:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:23,774 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-08-12 18:58:23,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-08-12 18:58:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:23,778 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:23,778 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:23,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-12 18:58:23,979 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-08-12 18:58:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:23,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851783027] [2021-08-12 18:58:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:58:24,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:24,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851783027] [2021-08-12 18:58:24,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851783027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:24,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832048440] [2021-08-12 18:58:24,030 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:24,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 18:58:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:58:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:24,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832048440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:24,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:24,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-08-12 18:58:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228419554] [2021-08-12 18:58:24,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:58:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:58:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:58:24,162 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:32,631 INFO L93 Difference]: Finished difference Result 5047 states and 12103 transitions. [2021-08-12 18:58:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:58:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:32,659 INFO L225 Difference]: With dead ends: 5047 [2021-08-12 18:58:32,659 INFO L226 Difference]: Without dead ends: 5032 [2021-08-12 18:58:32,660 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:58:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-08-12 18:58:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-08-12 18:58:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-08-12 18:58:34,067 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-08-12 18:58:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:34,067 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-08-12 18:58:34,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-08-12 18:58:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:34,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:34,071 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:34,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-12 18:58:34,271 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:34,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-08-12 18:58:34,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:34,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688775642] [2021-08-12 18:58:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:58:34,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:34,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688775642] [2021-08-12 18:58:34,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688775642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:34,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750672825] [2021-08-12 18:58:34,331 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:34,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:58:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:58:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750672825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 18:58:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008020876] [2021-08-12 18:58:34,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:58:34,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:58:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:34,417 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:40,623 INFO L93 Difference]: Finished difference Result 4127 states and 10012 transitions. [2021-08-12 18:58:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:40,653 INFO L225 Difference]: With dead ends: 4127 [2021-08-12 18:58:40,654 INFO L226 Difference]: Without dead ends: 4082 [2021-08-12 18:58:40,654 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:58:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-08-12 18:58:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-08-12 18:58:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-08-12 18:58:42,126 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-08-12 18:58:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:42,126 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-08-12 18:58:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-08-12 18:58:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:42,130 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:42,130 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:42,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-12 18:58:42,331 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-08-12 18:58:42,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:42,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584990041] [2021-08-12 18:58:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:58:42,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:42,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584990041] [2021-08-12 18:58:42,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584990041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:42,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562413304] [2021-08-12 18:58:42,403 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:42,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 18:58:42,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:58:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:58:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562413304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:42,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:42,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:58:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048093854] [2021-08-12 18:58:42,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:42,490 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:48,880 INFO L93 Difference]: Finished difference Result 4476 states and 10887 transitions. [2021-08-12 18:58:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:58:48,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:48,902 INFO L225 Difference]: With dead ends: 4476 [2021-08-12 18:58:48,903 INFO L226 Difference]: Without dead ends: 4397 [2021-08-12 18:58:48,903 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:58:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-08-12 18:58:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-08-12 18:58:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-08-12 18:58:50,367 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-08-12 18:58:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:50,368 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-08-12 18:58:50,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-08-12 18:58:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:50,372 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:50,372 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:50,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-08-12 18:58:50,572 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-08-12 18:58:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:50,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247927307] [2021-08-12 18:58:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:58:50,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247927307] [2021-08-12 18:58:50,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247927307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621152987] [2021-08-12 18:58:50,630 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:50,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 18:58:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:58:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:58:50,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621152987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:50,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:50,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 18:58:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424406261] [2021-08-12 18:58:50,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:50,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:50,737 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:56,938 INFO L93 Difference]: Finished difference Result 4175 states and 10157 transitions. [2021-08-12 18:58:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:58:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 18:58:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:56,964 INFO L225 Difference]: With dead ends: 4175 [2021-08-12 18:58:56,964 INFO L226 Difference]: Without dead ends: 4057 [2021-08-12 18:58:56,965 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:58:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-08-12 18:58:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-08-12 18:58:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-08-12 18:58:58,422 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-08-12 18:58:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:58,422 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-08-12 18:58:58,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-08-12 18:58:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:58:58,426 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:58,426 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:58,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:58,627 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-08-12 18:58:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:58,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574746221] [2021-08-12 18:58:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:58:58,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574746221] [2021-08-12 18:58:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574746221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420991390] [2021-08-12 18:58:58,686 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:58,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 18:58:58,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:58:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:58:58,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420991390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:58,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:58,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:58:58,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892974419] [2021-08-12 18:58:58,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:58,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:58,778 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:05,625 INFO L93 Difference]: Finished difference Result 4432 states and 10762 transitions. [2021-08-12 18:59:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:59:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 41 [2021-08-12 18:59:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:05,649 INFO L225 Difference]: With dead ends: 4432 [2021-08-12 18:59:05,649 INFO L226 Difference]: Without dead ends: 4363 [2021-08-12 18:59:05,650 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-12 18:59:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-08-12 18:59:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-08-12 18:59:07,236 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-08-12 18:59:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:07,236 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-08-12 18:59:07,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-08-12 18:59:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:59:07,239 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:07,239 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:07,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:07,440 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-08-12 18:59:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:07,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802672050] [2021-08-12 18:59:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:59:07,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802672050] [2021-08-12 18:59:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802672050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013750442] [2021-08-12 18:59:07,482 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:59:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:07,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013750442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:07,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:07,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-08-12 18:59:07,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858305941] [2021-08-12 18:59:07,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:07,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:07,567 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:15,220 INFO L93 Difference]: Finished difference Result 4676 states and 11243 transitions. [2021-08-12 18:59:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:59:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 18:59:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:15,249 INFO L225 Difference]: With dead ends: 4676 [2021-08-12 18:59:15,249 INFO L226 Difference]: Without dead ends: 4643 [2021-08-12 18:59:15,250 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-08-12 18:59:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-08-12 18:59:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-08-12 18:59:16,893 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-08-12 18:59:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:16,893 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-08-12 18:59:16,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-08-12 18:59:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:59:16,896 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:16,896 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:17,097 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-08-12 18:59:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:17,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091866415] [2021-08-12 18:59:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:59:17,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091866415] [2021-08-12 18:59:17,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091866415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689047514] [2021-08-12 18:59:17,149 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:59:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:59:17,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689047514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:17,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:17,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 18:59:17,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182421017] [2021-08-12 18:59:17,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:59:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:59:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:59:17,229 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:24,173 INFO L93 Difference]: Finished difference Result 4455 states and 10702 transitions. [2021-08-12 18:59:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:59:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 41 [2021-08-12 18:59:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:24,202 INFO L225 Difference]: With dead ends: 4455 [2021-08-12 18:59:24,203 INFO L226 Difference]: Without dead ends: 4407 [2021-08-12 18:59:24,203 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:59:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-08-12 18:59:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-08-12 18:59:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-08-12 18:59:25,742 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-08-12 18:59:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:25,742 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-08-12 18:59:25,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-08-12 18:59:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:59:25,745 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:25,745 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:25,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:25,946 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-08-12 18:59:25,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:25,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022730203] [2021-08-12 18:59:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:59:26,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022730203] [2021-08-12 18:59:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022730203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140842213] [2021-08-12 18:59:26,001 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:26,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:59:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:59:26,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140842213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:26,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:26,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:59:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112924037] [2021-08-12 18:59:26,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:26,086 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:35,164 INFO L93 Difference]: Finished difference Result 5202 states and 12460 transitions. [2021-08-12 18:59:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:59:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-08-12 18:59:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:35,195 INFO L225 Difference]: With dead ends: 5202 [2021-08-12 18:59:35,195 INFO L226 Difference]: Without dead ends: 5121 [2021-08-12 18:59:35,195 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-08-12 18:59:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-08-12 18:59:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-08-12 18:59:36,876 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-08-12 18:59:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:36,876 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-08-12 18:59:36,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-08-12 18:59:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:59:36,881 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:36,881 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:37,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-08-12 18:59:37,082 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-08-12 18:59:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:37,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176786471] [2021-08-12 18:59:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:59:37,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:37,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176786471] [2021-08-12 18:59:37,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176786471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:37,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981481587] [2021-08-12 18:59:37,145 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:37,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 18:59:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:59:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:59:37,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981481587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:37,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:37,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 18:59:37,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893247525] [2021-08-12 18:59:37,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:37,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:37,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:37,229 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:44,334 INFO L93 Difference]: Finished difference Result 4483 states and 10739 transitions. [2021-08-12 18:59:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:59:44,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 41 [2021-08-12 18:59:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:44,362 INFO L225 Difference]: With dead ends: 4483 [2021-08-12 18:59:44,362 INFO L226 Difference]: Without dead ends: 4429 [2021-08-12 18:59:44,363 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-08-12 18:59:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-08-12 18:59:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-08-12 18:59:45,994 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-08-12 18:59:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:45,994 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-08-12 18:59:45,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-08-12 18:59:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:59:45,998 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:45,998 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:46,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-08-12 18:59:46,198 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-08-12 18:59:46,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:46,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443737693] [2021-08-12 18:59:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:59:46,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443737693] [2021-08-12 18:59:46,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443737693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6896476] [2021-08-12 18:59:46,263 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:46,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:46,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 18:59:46,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:59:46,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6896476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:46,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:46,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 18:59:46,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540462536] [2021-08-12 18:59:46,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:59:46,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:46,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:59:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:46,346 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:55,931 INFO L93 Difference]: Finished difference Result 4978 states and 11842 transitions. [2021-08-12 18:59:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:59:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 41 [2021-08-12 18:59:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:55,958 INFO L225 Difference]: With dead ends: 4978 [2021-08-12 18:59:55,959 INFO L226 Difference]: Without dead ends: 4885 [2021-08-12 18:59:55,959 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:59:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-08-12 18:59:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-08-12 18:59:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-08-12 18:59:57,589 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-08-12 18:59:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:57,589 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-08-12 18:59:57,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-08-12 18:59:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 18:59:57,593 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:57,593 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:57,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:57,794 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-08-12 18:59:57,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:57,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557230990] [2021-08-12 18:59:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:59:57,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:57,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557230990] [2021-08-12 18:59:57,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557230990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:57,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397731176] [2021-08-12 18:59:57,850 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:57,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 18:59:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:59:57,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397731176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:57,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:57,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-08-12 18:59:57,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073376658] [2021-08-12 18:59:57,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:57,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:57,942 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:09,759 INFO L93 Difference]: Finished difference Result 5790 states and 13735 transitions. [2021-08-12 19:00:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:00:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 19:00:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:09,793 INFO L225 Difference]: With dead ends: 5790 [2021-08-12 19:00:09,793 INFO L226 Difference]: Without dead ends: 5763 [2021-08-12 19:00:09,794 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:00:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-08-12 19:00:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-08-12 19:00:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-08-12 19:00:11,557 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-08-12 19:00:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:11,557 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-08-12 19:00:11,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-08-12 19:00:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:00:11,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:11,561 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:11,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:11,762 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:11,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-08-12 19:00:11,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:11,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747968740] [2021-08-12 19:00:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:00:11,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:11,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747968740] [2021-08-12 19:00:11,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747968740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:11,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929402455] [2021-08-12 19:00:11,820 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:11,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 19:00:11,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:00:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:00:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929402455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:11,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:11,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-08-12 19:00:11,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742603322] [2021-08-12 19:00:11,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:11,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:11,912 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:23,691 INFO L93 Difference]: Finished difference Result 5713 states and 13555 transitions. [2021-08-12 19:00:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:00:23,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 19:00:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:23,727 INFO L225 Difference]: With dead ends: 5713 [2021-08-12 19:00:23,727 INFO L226 Difference]: Without dead ends: 5686 [2021-08-12 19:00:23,728 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:00:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-08-12 19:00:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-08-12 19:00:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-08-12 19:00:25,444 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-08-12 19:00:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:25,444 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-08-12 19:00:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-08-12 19:00:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:00:25,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:25,448 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:25,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-12 19:00:25,648 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-08-12 19:00:25,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:25,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246026558] [2021-08-12 19:00:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:00:25,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:25,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246026558] [2021-08-12 19:00:25,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246026558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:25,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106329392] [2021-08-12 19:00:25,713 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:25,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:25,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:00:25,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:25,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106329392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:25,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:25,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-08-12 19:00:25,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802422434] [2021-08-12 19:00:25,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:00:25,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:00:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:00:25,810 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:35,521 INFO L93 Difference]: Finished difference Result 4909 states and 11694 transitions. [2021-08-12 19:00:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:00:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-08-12 19:00:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:35,548 INFO L225 Difference]: With dead ends: 4909 [2021-08-12 19:00:35,548 INFO L226 Difference]: Without dead ends: 4882 [2021-08-12 19:00:35,548 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:00:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-08-12 19:00:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-08-12 19:00:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-08-12 19:00:37,131 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-08-12 19:00:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:37,131 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-08-12 19:00:37,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-08-12 19:00:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:00:37,135 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:37,135 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:37,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-12 19:00:37,335 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-08-12 19:00:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:37,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976249015] [2021-08-12 19:00:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:00:37,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:37,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976249015] [2021-08-12 19:00:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976249015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:37,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562704592] [2021-08-12 19:00:37,404 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:37,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:00:37,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:00:37,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:37,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562704592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:37,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:37,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-08-12 19:00:37,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557351188] [2021-08-12 19:00:37,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:00:37,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:37,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:00:37,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:00:37,514 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:44,845 INFO L93 Difference]: Finished difference Result 4220 states and 10135 transitions. [2021-08-12 19:00:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:00:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 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 41 [2021-08-12 19:00:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:44,873 INFO L225 Difference]: With dead ends: 4220 [2021-08-12 19:00:44,874 INFO L226 Difference]: Without dead ends: 4166 [2021-08-12 19:00:44,874 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:00:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-08-12 19:00:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-08-12 19:00:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-08-12 19:00:46,503 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-08-12 19:00:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:46,503 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-08-12 19:00:46,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-08-12 19:00:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:00:46,507 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:46,507 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:46,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-12 19:00:46,707 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-08-12 19:00:46,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:46,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319730940] [2021-08-12 19:00:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:00:46,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:46,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319730940] [2021-08-12 19:00:46,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319730940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:46,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141071113] [2021-08-12 19:00:46,751 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:46,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 19:00:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:46,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:00:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:00:46,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141071113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:46,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:46,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 19:00:46,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549804566] [2021-08-12 19:00:46,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:00:46,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:00:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:00:46,836 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) Received shutdown request... [2021-08-12 19:00:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:00:54,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:54,788 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:00:54,791 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:00:54,792 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:00:54,792 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:00:54 BasicIcfg [2021-08-12 19:00:54,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:00:54,793 INFO L168 Benchmark]: Toolchain (without parser) took 581353.08 ms. Allocated memory was 211.8 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 192.3 MB in the beginning and 379.8 MB in the end (delta: -187.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-12 19:00:54,793 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 211.8 MB. Free memory is still 193.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:00:54,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.33 ms. Allocated memory is still 211.8 MB. Free memory was 192.1 MB in the beginning and 190.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:00:54,793 INFO L168 Benchmark]: Boogie Preprocessor took 14.81 ms. Allocated memory is still 211.8 MB. Free memory was 190.7 MB in the beginning and 189.8 MB in the end (delta: 926.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:00:54,793 INFO L168 Benchmark]: RCFGBuilder took 246.87 ms. Allocated memory is still 211.8 MB. Free memory was 189.6 MB in the beginning and 178.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-12 19:00:54,793 INFO L168 Benchmark]: TraceAbstraction took 581063.43 ms. Allocated memory was 211.8 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 178.3 MB in the beginning and 379.8 MB in the end (delta: -201.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-12 19:00:54,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 211.8 MB. Free memory is still 193.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.33 ms. Allocated memory is still 211.8 MB. Free memory was 192.1 MB in the beginning and 190.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.81 ms. Allocated memory is still 211.8 MB. Free memory was 190.7 MB in the beginning and 189.8 MB in the end (delta: 926.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 246.87 ms. Allocated memory is still 211.8 MB. Free memory was 189.6 MB in the beginning and 178.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 581063.43 ms. Allocated memory was 211.8 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 178.3 MB in the beginning and 379.8 MB in the end (delta: -201.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3551states) and FLOYD_HOARE automaton (currently 9 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (3520 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 580980.4ms, OverallIterations: 147, TraceHistogramMax: 6, EmptinessCheckTime: 443.6ms, AutomataDifference: 436073.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5280 SDtfs, 16410 SDslu, 20875 SDs, 0 SdLazy, 36682 SolverSat, 1534 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14978.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6041 GetRequests, 4285 SyntacticMatches, 163 SemanticMatches, 1593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4539 ImplicationChecksByTransitivity, 11960.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15263occurred in iteration=86, InterpolantAutomatonStates: 1618, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 94231.1ms AutomataMinimizationTime, 146 MinimizatonAttempts, 112055 StatesRemovedByMinimization, 144 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 357.5ms SsaConstructionTime, 1448.0ms SatisfiabilityAnalysisTime, 15007.5ms InterpolantComputationTime, 8844 NumberOfCodeBlocks, 8823 NumberOfCodeBlocksAsserted, 631 NumberOfCheckSat, 8559 ConstructedInterpolants, 101 QuantifiedInterpolants, 58229 SizeOfPredicates, 264 NumberOfNonLiveVariables, 9952 ConjunctsInSsa, 1794 ConjunctsInUnsatCore, 285 InterpolantComputations, 11 PerfectInterpolantSequences, 3873/9585 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown