/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:41:22,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:41:22,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:41:22,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:41:23,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 13:41:23,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:41:23,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:41:23,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:41:23,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:41:23,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:41:23,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:41:23,083 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:41:23,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:41:23,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:41:23,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:41:23,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:41:23,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:41:23,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:41:23,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:41:23,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:41:23,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:41:23,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:41:23,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:41:23,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:41:23,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:41:23,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:41:23,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:41:23,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:41:23,086 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:41:23,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:41:23,087 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:41:23,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:41:23,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:41:23,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:41:23,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:41:23,381 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:41:23,382 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:41:23,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2021-06-05 13:41:23,383 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-06-05 13:41:23,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:41:23,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:41:23,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:41:23,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:41:23,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:41:23,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:41:23,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:41:23,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:41:23,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:41:23,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... [2021-06-05 13:41:23,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:41:23,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:41:23,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:41:23,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:41:23,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:41:23,529 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:41:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:41:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:41:23,530 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:41:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:41:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:41:23,530 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:41:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:41:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:41:23,531 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 13:41:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 13:41:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 13:41:23,532 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:41:23,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:41:23,735 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:41:23,736 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:41:23 BoogieIcfgContainer [2021-06-05 13:41:23,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:41:23,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:41:23,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:41:23,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:41:23,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:23" (1/2) ... [2021-06-05 13:41:23,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4344e269 and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:41:23, skipping insertion in model container [2021-06-05 13:41:23,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:41:23" (2/2) ... [2021-06-05 13:41:23,743 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-06-05 13:41:23,748 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:41:23,748 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:41:23,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:41:23,749 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:41:23,801 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 13:41:23,826 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:41:23,858 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:41:23,858 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:41:23,858 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:41:23,858 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:41:23,859 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:41:23,859 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:41:23,859 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:41:23,859 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:41:23,866 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-06-05 13:41:23,922 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:41:23,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:23,942 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:23,943 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-06-05 13:41:23,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:23,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598073674] [2021-06-05 13:41:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:24,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:24,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598073674] [2021-06-05 13:41:24,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598073674] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:24,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:24,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:24,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117060476] [2021-06-05 13:41:24,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:24,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:24,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:24,333 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:24,513 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2021-06-05 13:41:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:41:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:41:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:24,540 INFO L225 Difference]: With dead ends: 606 [2021-06-05 13:41:24,540 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 13:41:24,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 13:41:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-06-05 13:41:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-06-05 13:41:24,638 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-06-05 13:41:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:24,638 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-06-05 13:41:24,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-06-05 13:41:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:24,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:24,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:24,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:41:24,644 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-06-05 13:41:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:24,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379143954] [2021-06-05 13:41:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:24,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379143954] [2021-06-05 13:41:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379143954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500727592] [2021-06-05 13:41:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:41:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:24,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500727592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:24,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:24,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 13:41:24,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582408043] [2021-06-05 13:41:24,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:24,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:24,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:24,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:24,904 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:25,014 INFO L93 Difference]: Finished difference Result 1011 states and 3270 transitions. [2021-06-05 13:41:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:25,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:41:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:25,022 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 13:41:25,022 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 13:41:25,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 13:41:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-06-05 13:41:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-06-05 13:41:25,066 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-06-05 13:41:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:25,066 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-06-05 13:41:25,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-06-05 13:41:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:25,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:25,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:25,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:41:25,303 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:25,303 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-06-05 13:41:25,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:25,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486151475] [2021-06-05 13:41:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:25,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486151475] [2021-06-05 13:41:25,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486151475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461656641] [2021-06-05 13:41:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:25,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:25,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461656641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:25,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:25,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:25,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518220994] [2021-06-05 13:41:25,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:25,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:25,640 INFO L87 Difference]: Start difference. First operand 440 states and 1475 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) [2021-06-05 13:41:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:26,119 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2021-06-05 13:41:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:41:26,120 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 18 [2021-06-05 13:41:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:26,128 INFO L225 Difference]: With dead ends: 1656 [2021-06-05 13:41:26,128 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 13:41:26,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:41:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 13:41:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-06-05 13:41:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-06-05 13:41:26,156 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-06-05 13:41:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:26,156 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-06-05 13:41:26,156 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) [2021-06-05 13:41:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-06-05 13:41:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:26,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:26,159 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:26,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:26,372 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-06-05 13:41:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:26,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12805273] [2021-06-05 13:41:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:26,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12805273] [2021-06-05 13:41:26,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12805273] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:26,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:26,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:26,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207140620] [2021-06-05 13:41:26,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:26,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:26,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:26,418 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:26,508 INFO L93 Difference]: Finished difference Result 1343 states and 4620 transitions. [2021-06-05 13:41:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:26,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:41:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:26,515 INFO L225 Difference]: With dead ends: 1343 [2021-06-05 13:41:26,515 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 13:41:26,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 13:41:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-06-05 13:41:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4829329962073325) internal successors, (2755), 791 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-06-05 13:41:26,543 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-06-05 13:41:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:26,543 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-06-05 13:41:26,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-06-05 13:41:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:26,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:26,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:26,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:41:26,546 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:26,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-06-05 13:41:26,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:26,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460625470] [2021-06-05 13:41:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:26,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:26,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460625470] [2021-06-05 13:41:26,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460625470] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:26,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:26,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:26,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980403158] [2021-06-05 13:41:26,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:26,587 INFO L87 Difference]: Start difference. First operand 792 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:26,668 INFO L93 Difference]: Finished difference Result 1367 states and 4635 transitions. [2021-06-05 13:41:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:26,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:41:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:26,676 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 13:41:26,676 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 13:41:26,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 13:41:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-06-05 13:41:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4561186650185416) internal successors, (2796), 809 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-06-05 13:41:26,706 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-06-05 13:41:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:26,707 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-06-05 13:41:26,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-06-05 13:41:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:26,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:26,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:26,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:41:26,710 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-06-05 13:41:26,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:26,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989424471] [2021-06-05 13:41:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:26,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:26,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989424471] [2021-06-05 13:41:26,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989424471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:26,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523968031] [2021-06-05 13:41:26,744 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:26,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:26,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:26,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:26,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:26,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523968031] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:26,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 13:41:26,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-06-05 13:41:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291391848] [2021-06-05 13:41:26,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:26,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:26,967 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:27,151 INFO L93 Difference]: Finished difference Result 1377 states and 4559 transitions. [2021-06-05 13:41:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:41:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:27,159 INFO L225 Difference]: With dead ends: 1377 [2021-06-05 13:41:27,159 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 13:41:27,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 13:41:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 804. [2021-06-05 13:41:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.460772104607721) internal successors, (2779), 803 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2779 transitions. [2021-06-05 13:41:27,190 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2779 transitions. Word has length 18 [2021-06-05 13:41:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:27,190 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2779 transitions. [2021-06-05 13:41:27,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2779 transitions. [2021-06-05 13:41:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:27,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:27,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:27,416 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash -678642568, now seen corresponding path program 3 times [2021-06-05 13:41:27,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:27,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953864370] [2021-06-05 13:41:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:27,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:27,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953864370] [2021-06-05 13:41:27,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953864370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:27,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094490461] [2021-06-05 13:41:27,467 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 [2021-06-05 13:41:27,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:41:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:27,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094490461] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 13:41:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-06-05 13:41:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249270651] [2021-06-05 13:41:27,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:27,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:27,648 INFO L87 Difference]: Start difference. First operand 804 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:27,881 INFO L93 Difference]: Finished difference Result 1697 states and 5759 transitions. [2021-06-05 13:41:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:41:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:27,892 INFO L225 Difference]: With dead ends: 1697 [2021-06-05 13:41:27,892 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 13:41:27,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 13:41:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 817. [2021-06-05 13:41:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.450980392156863) internal successors, (2816), 816 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2816 transitions. [2021-06-05 13:41:27,927 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2816 transitions. Word has length 18 [2021-06-05 13:41:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:27,928 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2816 transitions. [2021-06-05 13:41:27,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2816 transitions. [2021-06-05 13:41:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:41:27,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:28,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:28,153 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -437071600, now seen corresponding path program 4 times [2021-06-05 13:41:28,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:28,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141335115] [2021-06-05 13:41:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:28,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141335115] [2021-06-05 13:41:28,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141335115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780766912] [2021-06-05 13:41:28,191 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:28,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:41:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780766912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 13:41:28,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212669008] [2021-06-05 13:41:28,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:28,300 INFO L87 Difference]: Start difference. First operand 817 states and 2816 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) [2021-06-05 13:41:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:28,438 INFO L93 Difference]: Finished difference Result 1418 states and 4750 transitions. [2021-06-05 13:41:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:28,438 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 18 [2021-06-05 13:41:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:28,445 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 13:41:28,445 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 13:41:28,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 13:41:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 707. [2021-06-05 13:41:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.4674220963172804) internal successors, (2448), 706 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-06-05 13:41:28,470 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-06-05 13:41:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:28,470 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-06-05 13:41:28,470 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) [2021-06-05 13:41:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-06-05 13:41:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:41:28,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:28,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:28,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:28,689 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-06-05 13:41:28,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:28,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422525106] [2021-06-05 13:41:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:28,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:28,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422525106] [2021-06-05 13:41:28,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422525106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764406240] [2021-06-05 13:41:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:41:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:28,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:28,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:28,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:28,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:28,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:41:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764406240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 13:41:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317671459] [2021-06-05 13:41:28,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:28,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:28,894 INFO L87 Difference]: Start difference. First operand 707 states and 2448 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) [2021-06-05 13:41:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:29,862 INFO L93 Difference]: Finished difference Result 3825 states and 12801 transitions. [2021-06-05 13:41:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:41:29,862 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 21 [2021-06-05 13:41:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:29,881 INFO L225 Difference]: With dead ends: 3825 [2021-06-05 13:41:29,882 INFO L226 Difference]: Without dead ends: 3619 [2021-06-05 13:41:29,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:41:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-06-05 13:41:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1302. [2021-06-05 13:41:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.6541122213681785) internal successors, (4754), 1301 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4754 transitions. [2021-06-05 13:41:29,942 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4754 transitions. Word has length 21 [2021-06-05 13:41:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:29,942 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4754 transitions. [2021-06-05 13:41:29,942 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) [2021-06-05 13:41:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4754 transitions. [2021-06-05 13:41:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:41:29,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:29,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:30,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:30,171 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1831057363, now seen corresponding path program 1 times [2021-06-05 13:41:30,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:30,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701087522] [2021-06-05 13:41:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:30,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:30,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701087522] [2021-06-05 13:41:30,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701087522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947932522] [2021-06-05 13:41:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:41:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:30,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947932522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:30,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 13:41:30,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766580457] [2021-06-05 13:41:30,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:30,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:30,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:30,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:30,350 INFO L87 Difference]: Start difference. First operand 1302 states and 4754 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) [2021-06-05 13:41:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:31,261 INFO L93 Difference]: Finished difference Result 3835 states and 12901 transitions. [2021-06-05 13:41:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:41:31,261 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 21 [2021-06-05 13:41:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:31,291 INFO L225 Difference]: With dead ends: 3835 [2021-06-05 13:41:31,292 INFO L226 Difference]: Without dead ends: 3583 [2021-06-05 13:41:31,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 544.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:41:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-06-05 13:41:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1499. [2021-06-05 13:41:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.6348464619492655) internal successors, (5445), 1498 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5445 transitions. [2021-06-05 13:41:31,350 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5445 transitions. Word has length 21 [2021-06-05 13:41:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:31,351 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5445 transitions. [2021-06-05 13:41:31,351 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) [2021-06-05 13:41:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5445 transitions. [2021-06-05 13:41:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:41:31,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:31,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 13:41:31,573 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 2 times [2021-06-05 13:41:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632865482] [2021-06-05 13:41:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:31,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:31,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632865482] [2021-06-05 13:41:31,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632865482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363712479] [2021-06-05 13:41:31,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:31,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:31,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:31,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:41:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:31,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363712479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:31,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 13:41:31,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593279969] [2021-06-05 13:41:31,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:31,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:31,731 INFO L87 Difference]: Start difference. First operand 1499 states and 5445 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:31,965 INFO L93 Difference]: Finished difference Result 2934 states and 10298 transitions. [2021-06-05 13:41:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:41:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:31,975 INFO L225 Difference]: With dead ends: 2934 [2021-06-05 13:41:31,975 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 13:41:31,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 13:41:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1307. [2021-06-05 13:41:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.627105666156202) internal successors, (4737), 1306 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4737 transitions. [2021-06-05 13:41:32,020 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4737 transitions. Word has length 21 [2021-06-05 13:41:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:32,020 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4737 transitions. [2021-06-05 13:41:32,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4737 transitions. [2021-06-05 13:41:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:41:32,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:32,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:32,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 13:41:32,241 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash 801774587, now seen corresponding path program 3 times [2021-06-05 13:41:32,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785160968] [2021-06-05 13:41:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:32,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785160968] [2021-06-05 13:41:32,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785160968] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:32,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:32,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:32,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949235200] [2021-06-05 13:41:32,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:32,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:32,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:32,283 INFO L87 Difference]: Start difference. First operand 1307 states and 4737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:32,372 INFO L93 Difference]: Finished difference Result 2081 states and 7468 transitions. [2021-06-05 13:41:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:41:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:32,379 INFO L225 Difference]: With dead ends: 2081 [2021-06-05 13:41:32,379 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 13:41:32,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 13:41:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1303. [2021-06-05 13:41:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.6267281105990783) internal successors, (4722), 1302 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4722 transitions. [2021-06-05 13:41:32,415 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4722 transitions. Word has length 21 [2021-06-05 13:41:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:32,415 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4722 transitions. [2021-06-05 13:41:32,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4722 transitions. [2021-06-05 13:41:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:41:32,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:32,418 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:32,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 13:41:32,419 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2028027159, now seen corresponding path program 2 times [2021-06-05 13:41:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063563670] [2021-06-05 13:41:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:32,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063563670] [2021-06-05 13:41:32,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063563670] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:32,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:32,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:32,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919782327] [2021-06-05 13:41:32,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:32,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:32,447 INFO L87 Difference]: Start difference. First operand 1303 states and 4722 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:32,538 INFO L93 Difference]: Finished difference Result 2051 states and 7360 transitions. [2021-06-05 13:41:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:41:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:32,544 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 13:41:32,544 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 13:41:32,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 13:41:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1327. [2021-06-05 13:41:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.6093514328808447) internal successors, (4786), 1326 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4786 transitions. [2021-06-05 13:41:32,578 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4786 transitions. Word has length 21 [2021-06-05 13:41:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:32,578 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4786 transitions. [2021-06-05 13:41:32,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4786 transitions. [2021-06-05 13:41:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:41:32,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:32,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:32,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:41:32,582 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 4 times [2021-06-05 13:41:32,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146907084] [2021-06-05 13:41:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:32,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146907084] [2021-06-05 13:41:32,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146907084] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:32,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:32,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:32,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504863795] [2021-06-05 13:41:32,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:32,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:32,612 INFO L87 Difference]: Start difference. First operand 1327 states and 4786 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:32,682 INFO L93 Difference]: Finished difference Result 1854 states and 6806 transitions. [2021-06-05 13:41:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:41:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:32,688 INFO L225 Difference]: With dead ends: 1854 [2021-06-05 13:41:32,688 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 13:41:32,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 13:41:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1265. [2021-06-05 13:41:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.6360759493670884) internal successors, (4596), 1264 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4596 transitions. [2021-06-05 13:41:32,721 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4596 transitions. Word has length 21 [2021-06-05 13:41:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:32,722 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4596 transitions. [2021-06-05 13:41:32,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4596 transitions. [2021-06-05 13:41:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:32,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:32,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:32,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:41:32,725 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-06-05 13:41:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508920008] [2021-06-05 13:41:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:32,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508920008] [2021-06-05 13:41:32,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508920008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568836268] [2021-06-05 13:41:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568836268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:32,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:41:32,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183840693] [2021-06-05 13:41:32,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:41:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:41:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:32,992 INFO L87 Difference]: Start difference. First operand 1265 states and 4596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:33,388 INFO L93 Difference]: Finished difference Result 3756 states and 13001 transitions. [2021-06-05 13:41:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:41:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:33,398 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 13:41:33,398 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 13:41:33,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 13:41:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2042. [2021-06-05 13:41:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.724154826065654) internal successors, (7601), 2041 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7601 transitions. [2021-06-05 13:41:33,465 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7601 transitions. Word has length 24 [2021-06-05 13:41:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:33,465 INFO L482 AbstractCegarLoop]: Abstraction has 2042 states and 7601 transitions. [2021-06-05 13:41:33,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7601 transitions. [2021-06-05 13:41:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:33,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:33,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:33,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 13:41:33,694 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-06-05 13:41:33,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:33,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255142731] [2021-06-05 13:41:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:33,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:33,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255142731] [2021-06-05 13:41:33,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255142731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24886059] [2021-06-05 13:41:33,763 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:33,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:33,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:33,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:33,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:33,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24886059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:33,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:41:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092051651] [2021-06-05 13:41:33,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:41:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:41:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:33,911 INFO L87 Difference]: Start difference. First operand 2042 states and 7601 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:34,240 INFO L93 Difference]: Finished difference Result 3819 states and 13270 transitions. [2021-06-05 13:41:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:41:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:34,251 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 13:41:34,251 INFO L226 Difference]: Without dead ends: 3419 [2021-06-05 13:41:34,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:41:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-06-05 13:41:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2196. [2021-06-05 13:41:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.7599088838268795) internal successors, (8253), 2195 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8253 transitions. [2021-06-05 13:41:34,334 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8253 transitions. Word has length 24 [2021-06-05 13:41:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:34,334 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8253 transitions. [2021-06-05 13:41:34,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8253 transitions. [2021-06-05 13:41:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:34,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:34,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:34,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:41:34,565 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-06-05 13:41:34,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:34,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117384200] [2021-06-05 13:41:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:34,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117384200] [2021-06-05 13:41:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117384200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14693026] [2021-06-05 13:41:34,649 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:34,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:34,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14693026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:34,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:41:34,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836462907] [2021-06-05 13:41:34,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:41:34,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:41:34,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:34,809 INFO L87 Difference]: Start difference. First operand 2196 states and 8253 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:35,302 INFO L93 Difference]: Finished difference Result 4185 states and 15168 transitions. [2021-06-05 13:41:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:41:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:35,312 INFO L225 Difference]: With dead ends: 4185 [2021-06-05 13:41:35,313 INFO L226 Difference]: Without dead ends: 3585 [2021-06-05 13:41:35,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:41:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-05 13:41:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2406. [2021-06-05 13:41:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 3.761330561330561) internal successors, (9046), 2405 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 9046 transitions. [2021-06-05 13:41:35,378 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 9046 transitions. Word has length 24 [2021-06-05 13:41:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:35,378 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 9046 transitions. [2021-06-05 13:41:35,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 9046 transitions. [2021-06-05 13:41:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:35,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:35,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:35,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:41:35,597 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-06-05 13:41:35,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:35,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100319418] [2021-06-05 13:41:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:35,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:35,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100319418] [2021-06-05 13:41:35,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100319418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726783079] [2021-06-05 13:41:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:35,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:41:35,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:35,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:35,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:35,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:41:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:35,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726783079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:35,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:41:35,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662474496] [2021-06-05 13:41:35,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:35,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:35,790 INFO L87 Difference]: Start difference. First operand 2406 states and 9046 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) [2021-06-05 13:41:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:36,025 INFO L93 Difference]: Finished difference Result 4184 states and 14954 transitions. [2021-06-05 13:41:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:36,026 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 24 [2021-06-05 13:41:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:36,031 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 13:41:36,031 INFO L226 Difference]: Without dead ends: 3609 [2021-06-05 13:41:36,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-06-05 13:41:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2825. [2021-06-05 13:41:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 3.685198300283286) internal successors, (10407), 2824 states have internal predecessors, (10407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10407 transitions. [2021-06-05 13:41:36,093 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10407 transitions. Word has length 24 [2021-06-05 13:41:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:36,093 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10407 transitions. [2021-06-05 13:41:36,093 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) [2021-06-05 13:41:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10407 transitions. [2021-06-05 13:41:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:36,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:36,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:36,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:41:36,313 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:36,313 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-06-05 13:41:36,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:36,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600938566] [2021-06-05 13:41:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:36,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600938566] [2021-06-05 13:41:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600938566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814045444] [2021-06-05 13:41:36,406 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:36,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:36,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:41:36,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:36,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:36,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:36,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:41:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:36,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814045444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:36,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:41:36,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049124855] [2021-06-05 13:41:36,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:36,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:36,518 INFO L87 Difference]: Start difference. First operand 2825 states and 10407 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) [2021-06-05 13:41:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:36,750 INFO L93 Difference]: Finished difference Result 4952 states and 17662 transitions. [2021-06-05 13:41:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:36,751 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 24 [2021-06-05 13:41:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:36,760 INFO L225 Difference]: With dead ends: 4952 [2021-06-05 13:41:36,761 INFO L226 Difference]: Without dead ends: 4907 [2021-06-05 13:41:36,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-06-05 13:41:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 3559. [2021-06-05 13:41:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 3.7141652613827993) internal successors, (13215), 3558 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 13215 transitions. [2021-06-05 13:41:36,851 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 13215 transitions. Word has length 24 [2021-06-05 13:41:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:36,851 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 13215 transitions. [2021-06-05 13:41:36,851 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) [2021-06-05 13:41:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 13215 transitions. [2021-06-05 13:41:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:36,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:36,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:37,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,073 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-06-05 13:41:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:37,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431798800] [2021-06-05 13:41:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:37,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431798800] [2021-06-05 13:41:37,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431798800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480282431] [2021-06-05 13:41:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 13:41:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:37,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480282431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:37,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:41:37,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095919665] [2021-06-05 13:41:37,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:41:37,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:37,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:41:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:37,390 INFO L87 Difference]: Start difference. First operand 3559 states and 13215 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:37,613 INFO L93 Difference]: Finished difference Result 4119 states and 14931 transitions. [2021-06-05 13:41:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:37,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:37,621 INFO L225 Difference]: With dead ends: 4119 [2021-06-05 13:41:37,621 INFO L226 Difference]: Without dead ends: 3762 [2021-06-05 13:41:37,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:41:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-06-05 13:41:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3576. [2021-06-05 13:41:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 3.7023776223776226) internal successors, (13236), 3575 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 13236 transitions. [2021-06-05 13:41:37,690 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 13236 transitions. Word has length 24 [2021-06-05 13:41:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:37,690 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 13236 transitions. [2021-06-05 13:41:37,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 13236 transitions. [2021-06-05 13:41:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:37,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:37,699 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:37,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,912 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:37,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-06-05 13:41:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:37,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601268222] [2021-06-05 13:41:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:38,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:38,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601268222] [2021-06-05 13:41:38,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601268222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634610589] [2021-06-05 13:41:38,104 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 [2021-06-05 13:41:38,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:38,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:38,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:38,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634610589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:38,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:41:38,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499091731] [2021-06-05 13:41:38,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:41:38,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:41:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:38,289 INFO L87 Difference]: Start difference. First operand 3576 states and 13236 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:38,593 INFO L93 Difference]: Finished difference Result 4175 states and 15081 transitions. [2021-06-05 13:41:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:38,599 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 13:41:38,599 INFO L226 Difference]: Without dead ends: 3615 [2021-06-05 13:41:38,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:41:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-06-05 13:41:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3429. [2021-06-05 13:41:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.731330221703617) internal successors, (12791), 3428 states have internal predecessors, (12791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12791 transitions. [2021-06-05 13:41:38,644 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12791 transitions. Word has length 24 [2021-06-05 13:41:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:38,644 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12791 transitions. [2021-06-05 13:41:38,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12791 transitions. [2021-06-05 13:41:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:38,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:38,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:38,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 13:41:38,861 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:38,861 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 1 times [2021-06-05 13:41:38,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:38,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245662662] [2021-06-05 13:41:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:38,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:38,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245662662] [2021-06-05 13:41:38,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245662662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332356633] [2021-06-05 13:41:38,954 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 [2021-06-05 13:41:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:38,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:41:38,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:39,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332356633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:39,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 13:41:39,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458839889] [2021-06-05 13:41:39,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:41:39,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:39,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:41:39,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:39,097 INFO L87 Difference]: Start difference. First operand 3429 states and 12791 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:39,443 INFO L93 Difference]: Finished difference Result 4987 states and 17858 transitions. [2021-06-05 13:41:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:39,452 INFO L225 Difference]: With dead ends: 4987 [2021-06-05 13:41:39,452 INFO L226 Difference]: Without dead ends: 3821 [2021-06-05 13:41:39,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-06-05 13:41:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3319. [2021-06-05 13:41:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.648583484026522) internal successors, (12106), 3318 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 12106 transitions. [2021-06-05 13:41:39,560 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 12106 transitions. Word has length 24 [2021-06-05 13:41:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:39,560 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 12106 transitions. [2021-06-05 13:41:39,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 12106 transitions. [2021-06-05 13:41:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:39,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:39,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:39,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:39,790 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 1 times [2021-06-05 13:41:39,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:39,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522417992] [2021-06-05 13:41:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:39,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:39,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522417992] [2021-06-05 13:41:39,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522417992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671907513] [2021-06-05 13:41:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:39,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:39,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:39,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:39,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:41:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:39,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671907513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:39,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715914260] [2021-06-05 13:41:39,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:39,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:39,985 INFO L87 Difference]: Start difference. First operand 3319 states and 12106 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) [2021-06-05 13:41:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:40,230 INFO L93 Difference]: Finished difference Result 4339 states and 15458 transitions. [2021-06-05 13:41:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:40,230 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 24 [2021-06-05 13:41:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:40,239 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 13:41:40,239 INFO L226 Difference]: Without dead ends: 4198 [2021-06-05 13:41:40,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-05 13:41:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3613. [2021-06-05 13:41:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 3.638704318936877) internal successors, (13143), 3612 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 13143 transitions. [2021-06-05 13:41:40,313 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 13143 transitions. Word has length 24 [2021-06-05 13:41:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:40,313 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 13143 transitions. [2021-06-05 13:41:40,313 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) [2021-06-05 13:41:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 13143 transitions. [2021-06-05 13:41:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:40,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:40,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:40,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 13:41:40,537 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:40,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-06-05 13:41:40,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:40,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272598453] [2021-06-05 13:41:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:40,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:40,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272598453] [2021-06-05 13:41:40,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272598453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795689551] [2021-06-05 13:41:40,598 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:40,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:41:40,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:40,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:40,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:41:40,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:40,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:40,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:40,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:41:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:40,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795689551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:40,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:41:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946783236] [2021-06-05 13:41:40,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:40,727 INFO L87 Difference]: Start difference. First operand 3613 states and 13143 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) [2021-06-05 13:41:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:40,944 INFO L93 Difference]: Finished difference Result 4148 states and 14673 transitions. [2021-06-05 13:41:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:40,945 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 24 [2021-06-05 13:41:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:40,951 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 13:41:40,951 INFO L226 Difference]: Without dead ends: 3464 [2021-06-05 13:41:40,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-06-05 13:41:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3015. [2021-06-05 13:41:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.6250829462508296) internal successors, (10926), 3014 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 10926 transitions. [2021-06-05 13:41:41,009 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 10926 transitions. Word has length 24 [2021-06-05 13:41:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:41,009 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 10926 transitions. [2021-06-05 13:41:41,009 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) [2021-06-05 13:41:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 10926 transitions. [2021-06-05 13:41:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:41,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:41,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:41,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 13:41:41,238 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-06-05 13:41:41,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:41,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670062162] [2021-06-05 13:41:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:41,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:41,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670062162] [2021-06-05 13:41:41,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670062162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:41,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633186964] [2021-06-05 13:41:41,310 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:41,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:41,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:41,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:41,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:41,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:41,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:41,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:41,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:41:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:41,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633186964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:41,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:41,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:41,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022451781] [2021-06-05 13:41:41,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:41,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:41,441 INFO L87 Difference]: Start difference. First operand 3015 states and 10926 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) [2021-06-05 13:41:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:41,700 INFO L93 Difference]: Finished difference Result 3294 states and 11794 transitions. [2021-06-05 13:41:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:41,701 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 24 [2021-06-05 13:41:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:41,707 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 13:41:41,707 INFO L226 Difference]: Without dead ends: 3294 [2021-06-05 13:41:41,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-06-05 13:41:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3106. [2021-06-05 13:41:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 3.61256038647343) internal successors, (11217), 3105 states have internal predecessors, (11217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 11217 transitions. [2021-06-05 13:41:41,764 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 11217 transitions. Word has length 24 [2021-06-05 13:41:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:41,764 INFO L482 AbstractCegarLoop]: Abstraction has 3106 states and 11217 transitions. [2021-06-05 13:41:41,765 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) [2021-06-05 13:41:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 11217 transitions. [2021-06-05 13:41:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:41,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:41,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:41,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 13:41:41,981 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-06-05 13:41:41,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:41,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341517784] [2021-06-05 13:41:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:42,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:42,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341517784] [2021-06-05 13:41:42,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341517784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5286572] [2021-06-05 13:41:42,044 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:42,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:41:42,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:42,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:41:42,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:42,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:42,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:42,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:41:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:42,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5286572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:42,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:41:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106309805] [2021-06-05 13:41:42,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:42,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:42,143 INFO L87 Difference]: Start difference. First operand 3106 states and 11217 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) [2021-06-05 13:41:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:42,357 INFO L93 Difference]: Finished difference Result 4306 states and 15126 transitions. [2021-06-05 13:41:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:42,358 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 24 [2021-06-05 13:41:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:42,365 INFO L225 Difference]: With dead ends: 4306 [2021-06-05 13:41:42,365 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 13:41:42,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 13:41:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3262. [2021-06-05 13:41:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.609015639374425) internal successors, (11769), 3261 states have internal predecessors, (11769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 11769 transitions. [2021-06-05 13:41:42,419 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 11769 transitions. Word has length 24 [2021-06-05 13:41:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:42,419 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 11769 transitions. [2021-06-05 13:41:42,419 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) [2021-06-05 13:41:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 11769 transitions. [2021-06-05 13:41:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:42,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:42,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:42,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:41:42,625 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-06-05 13:41:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:42,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749560555] [2021-06-05 13:41:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:42,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:42,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749560555] [2021-06-05 13:41:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749560555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244234906] [2021-06-05 13:41:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:42,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:42,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244234906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:41:42,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151954519] [2021-06-05 13:41:42,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:41:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:42,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:41:42,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:42,942 INFO L87 Difference]: Start difference. First operand 3262 states and 11769 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:43,264 INFO L93 Difference]: Finished difference Result 3881 states and 13726 transitions. [2021-06-05 13:41:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:43,271 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 13:41:43,271 INFO L226 Difference]: Without dead ends: 3516 [2021-06-05 13:41:43,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:41:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-06-05 13:41:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3289. [2021-06-05 13:41:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3288 states have (on average 3.602493917274939) internal successors, (11845), 3288 states have internal predecessors, (11845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 11845 transitions. [2021-06-05 13:41:43,323 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 11845 transitions. Word has length 24 [2021-06-05 13:41:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:43,323 INFO L482 AbstractCegarLoop]: Abstraction has 3289 states and 11845 transitions. [2021-06-05 13:41:43,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 11845 transitions. [2021-06-05 13:41:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:43,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:43,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:43,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:41:43,530 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-06-05 13:41:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:43,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335962454] [2021-06-05 13:41:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:43,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:43,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335962454] [2021-06-05 13:41:43,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335962454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78340966] [2021-06-05 13:41:43,598 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:43,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:41:43,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:43,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:43,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:43,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:43,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:43,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:41:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:43,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78340966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:43,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:43,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486319747] [2021-06-05 13:41:43,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:43,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:43,708 INFO L87 Difference]: Start difference. First operand 3289 states and 11845 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) [2021-06-05 13:41:43,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:43,906 INFO L93 Difference]: Finished difference Result 3630 states and 12852 transitions. [2021-06-05 13:41:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:43,906 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 24 [2021-06-05 13:41:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:43,912 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 13:41:43,912 INFO L226 Difference]: Without dead ends: 3630 [2021-06-05 13:41:43,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-06-05 13:41:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3263. [2021-06-05 13:41:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.600551808706315) internal successors, (11745), 3262 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11745 transitions. [2021-06-05 13:41:43,957 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11745 transitions. Word has length 24 [2021-06-05 13:41:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:43,958 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 11745 transitions. [2021-06-05 13:41:43,958 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) [2021-06-05 13:41:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11745 transitions. [2021-06-05 13:41:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:43,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:43,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:44,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:44,171 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1434078121, now seen corresponding path program 2 times [2021-06-05 13:41:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:44,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102085378] [2021-06-05 13:41:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:44,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102085378] [2021-06-05 13:41:44,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102085378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107369102] [2021-06-05 13:41:44,276 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:44,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:44,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:41:44,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:44,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:44,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:44,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:41:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:44,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107369102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:44,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:41:44,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601699346] [2021-06-05 13:41:44,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:44,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:44,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:44,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:44,393 INFO L87 Difference]: Start difference. First operand 3263 states and 11745 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) [2021-06-05 13:41:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:44,589 INFO L93 Difference]: Finished difference Result 3854 states and 13464 transitions. [2021-06-05 13:41:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:44,589 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 24 [2021-06-05 13:41:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:44,596 INFO L225 Difference]: With dead ends: 3854 [2021-06-05 13:41:44,596 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 13:41:44,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 13:41:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3156. [2021-06-05 13:41:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.5984152139461174) internal successors, (11353), 3155 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 11353 transitions. [2021-06-05 13:41:44,650 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 11353 transitions. Word has length 24 [2021-06-05 13:41:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:44,650 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 11353 transitions. [2021-06-05 13:41:44,650 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) [2021-06-05 13:41:44,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 11353 transitions. [2021-06-05 13:41:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:44,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:44,655 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:44,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:41:44,856 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1862582325, now seen corresponding path program 3 times [2021-06-05 13:41:44,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:44,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680177903] [2021-06-05 13:41:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:44,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680177903] [2021-06-05 13:41:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680177903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384612183] [2021-06-05 13:41:44,907 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:44,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:44,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:44,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:44,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:44,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:44,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:44,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:44,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:44,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:41:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:44,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384612183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:44,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:44,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199072042] [2021-06-05 13:41:44,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:44,991 INFO L87 Difference]: Start difference. First operand 3156 states and 11353 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) [2021-06-05 13:41:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:45,225 INFO L93 Difference]: Finished difference Result 3384 states and 11803 transitions. [2021-06-05 13:41:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:45,226 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 24 [2021-06-05 13:41:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:45,231 INFO L225 Difference]: With dead ends: 3384 [2021-06-05 13:41:45,231 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 13:41:45,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 13:41:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2530. [2021-06-05 13:41:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.593910636615263) internal successors, (9089), 2529 states have internal predecessors, (9089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9089 transitions. [2021-06-05 13:41:45,270 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9089 transitions. Word has length 24 [2021-06-05 13:41:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:45,270 INFO L482 AbstractCegarLoop]: Abstraction has 2530 states and 9089 transitions. [2021-06-05 13:41:45,270 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) [2021-06-05 13:41:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9089 transitions. [2021-06-05 13:41:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:45,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:45,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:45,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:45,475 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-06-05 13:41:45,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:45,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312697517] [2021-06-05 13:41:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:45,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:45,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312697517] [2021-06-05 13:41:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312697517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623717331] [2021-06-05 13:41:45,675 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:45,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:45,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:45,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623717331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:45,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:41:45,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393740933] [2021-06-05 13:41:45,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:41:45,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:41:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:45,844 INFO L87 Difference]: Start difference. First operand 2530 states and 9089 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:46,260 INFO L93 Difference]: Finished difference Result 3403 states and 11831 transitions. [2021-06-05 13:41:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:46,267 INFO L225 Difference]: With dead ends: 3403 [2021-06-05 13:41:46,267 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 13:41:46,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 13:41:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2524. [2021-06-05 13:41:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 3.594926674593738) internal successors, (9070), 2523 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) [2021-06-05 13:41:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 9070 transitions. [2021-06-05 13:41:46,319 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 9070 transitions. Word has length 24 [2021-06-05 13:41:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:46,320 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 9070 transitions. [2021-06-05 13:41:46,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 9070 transitions. [2021-06-05 13:41:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:41:46,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:46,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:46,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 13:41:46,529 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:46,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-06-05 13:41:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:46,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798750120] [2021-06-05 13:41:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:46,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:46,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798750120] [2021-06-05 13:41:46,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798750120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417682266] [2021-06-05 13:41:46,685 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:46,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:46,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:46,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417682266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:46,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:41:46,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134984187] [2021-06-05 13:41:46,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:41:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:41:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:46,876 INFO L87 Difference]: Start difference. First operand 2524 states and 9070 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:47,349 INFO L93 Difference]: Finished difference Result 3698 states and 12705 transitions. [2021-06-05 13:41:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:41:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 13:41:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:47,353 INFO L225 Difference]: With dead ends: 3698 [2021-06-05 13:41:47,353 INFO L226 Difference]: Without dead ends: 2495 [2021-06-05 13:41:47,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:41:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-05 13:41:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2347. [2021-06-05 13:41:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.6027280477408357) internal successors, (8452), 2346 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8452 transitions. [2021-06-05 13:41:47,380 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8452 transitions. Word has length 24 [2021-06-05 13:41:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:47,380 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8452 transitions. [2021-06-05 13:41:47,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8452 transitions. [2021-06-05 13:41:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:47,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:47,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:47,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:47,584 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-06-05 13:41:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157074485] [2021-06-05 13:41:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:47,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:47,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157074485] [2021-06-05 13:41:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157074485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249693579] [2021-06-05 13:41:47,625 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:47,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:47,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249693579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:47,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 13:41:47,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047920847] [2021-06-05 13:41:47,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:47,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:47,724 INFO L87 Difference]: Start difference. First operand 2347 states and 8452 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) [2021-06-05 13:41:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:47,938 INFO L93 Difference]: Finished difference Result 7003 states and 24374 transitions. [2021-06-05 13:41:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:47,939 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 27 [2021-06-05 13:41:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:47,949 INFO L225 Difference]: With dead ends: 7003 [2021-06-05 13:41:47,949 INFO L226 Difference]: Without dead ends: 6243 [2021-06-05 13:41:47,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:41:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-06-05 13:41:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3941. [2021-06-05 13:41:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 3.7758883248730966) internal successors, (14877), 3940 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 14877 transitions. [2021-06-05 13:41:48,029 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 14877 transitions. Word has length 27 [2021-06-05 13:41:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:48,029 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 14877 transitions. [2021-06-05 13:41:48,029 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) [2021-06-05 13:41:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 14877 transitions. [2021-06-05 13:41:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:48,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:48,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:48,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 13:41:48,235 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-06-05 13:41:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:48,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416101978] [2021-06-05 13:41:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:48,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:48,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416101978] [2021-06-05 13:41:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416101978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422112769] [2021-06-05 13:41:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 13:41:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:48,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:48,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:48,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:48,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:48,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:41:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:48,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422112769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:48,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:48,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138105409] [2021-06-05 13:41:48,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:48,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:48,381 INFO L87 Difference]: Start difference. First operand 3941 states and 14877 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:48,551 INFO L93 Difference]: Finished difference Result 5052 states and 18543 transitions. [2021-06-05 13:41:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:41:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:48,559 INFO L225 Difference]: With dead ends: 5052 [2021-06-05 13:41:48,560 INFO L226 Difference]: Without dead ends: 4862 [2021-06-05 13:41:48,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-06-05 13:41:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4231. [2021-06-05 13:41:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.753900709219858) internal successors, (15879), 4230 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 15879 transitions. [2021-06-05 13:41:48,641 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 15879 transitions. Word has length 27 [2021-06-05 13:41:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 15879 transitions. [2021-06-05 13:41:48,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 15879 transitions. [2021-06-05 13:41:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:48,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:48,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:48,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:48,861 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-06-05 13:41:48,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:48,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869102349] [2021-06-05 13:41:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:48,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869102349] [2021-06-05 13:41:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869102349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537058732] [2021-06-05 13:41:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:48,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:48,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:49,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537058732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:49,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 13:41:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141657888] [2021-06-05 13:41:49,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:49,024 INFO L87 Difference]: Start difference. First operand 4231 states and 15879 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-06-05 13:41:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:49,180 INFO L93 Difference]: Finished difference Result 6079 states and 21441 transitions. [2021-06-05 13:41:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:49,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 27 [2021-06-05 13:41:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:49,190 INFO L225 Difference]: With dead ends: 6079 [2021-06-05 13:41:49,191 INFO L226 Difference]: Without dead ends: 5466 [2021-06-05 13:41:49,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-06-05 13:41:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4109. [2021-06-05 13:41:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 3.7458617332035056) internal successors, (15388), 4108 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 15388 transitions. [2021-06-05 13:41:49,255 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 15388 transitions. Word has length 27 [2021-06-05 13:41:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:49,255 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 15388 transitions. [2021-06-05 13:41:49,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-06-05 13:41:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 15388 transitions. [2021-06-05 13:41:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:49,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:49,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:49,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 13:41:49,469 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-06-05 13:41:49,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:49,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199301905] [2021-06-05 13:41:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:49,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:49,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199301905] [2021-06-05 13:41:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199301905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498689677] [2021-06-05 13:41:49,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:49,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:41:49,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:49,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498689677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:49,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 13:41:49,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518360139] [2021-06-05 13:41:49,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:49,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:49,593 INFO L87 Difference]: Start difference. First operand 4109 states and 15388 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) [2021-06-05 13:41:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:49,716 INFO L93 Difference]: Finished difference Result 8656 states and 31846 transitions. [2021-06-05 13:41:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:49,716 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 27 [2021-06-05 13:41:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:49,732 INFO L225 Difference]: With dead ends: 8656 [2021-06-05 13:41:49,732 INFO L226 Difference]: Without dead ends: 8340 [2021-06-05 13:41:49,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-06-05 13:41:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5370. [2021-06-05 13:41:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.8379586515179738) internal successors, (20606), 5369 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 20606 transitions. [2021-06-05 13:41:49,828 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 20606 transitions. Word has length 27 [2021-06-05 13:41:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:49,828 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 20606 transitions. [2021-06-05 13:41:49,828 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) [2021-06-05 13:41:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 20606 transitions. [2021-06-05 13:41:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:49,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:49,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:50,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:50,037 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-06-05 13:41:50,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:50,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470806027] [2021-06-05 13:41:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:50,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:50,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470806027] [2021-06-05 13:41:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470806027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352487713] [2021-06-05 13:41:50,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352487713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:50,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-06-05 13:41:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982155214] [2021-06-05 13:41:50,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:50,182 INFO L87 Difference]: Start difference. First operand 5370 states and 20606 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) [2021-06-05 13:41:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:50,312 INFO L93 Difference]: Finished difference Result 8619 states and 31580 transitions. [2021-06-05 13:41:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:50,313 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 27 [2021-06-05 13:41:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:50,333 INFO L225 Difference]: With dead ends: 8619 [2021-06-05 13:41:50,333 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 13:41:50,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 13:41:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 5352. [2021-06-05 13:41:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.834984115118669) internal successors, (20521), 5351 states have internal predecessors, (20521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 20521 transitions. [2021-06-05 13:41:50,462 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 20521 transitions. Word has length 27 [2021-06-05 13:41:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:50,462 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 20521 transitions. [2021-06-05 13:41:50,462 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) [2021-06-05 13:41:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 20521 transitions. [2021-06-05 13:41:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:50,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:50,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:50,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:41:50,689 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-06-05 13:41:50,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:50,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432117904] [2021-06-05 13:41:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:50,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432117904] [2021-06-05 13:41:50,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432117904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680899490] [2021-06-05 13:41:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:50,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:50,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680899490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:50,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 13:41:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880013523] [2021-06-05 13:41:50,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:50,896 INFO L87 Difference]: Start difference. First operand 5352 states and 20521 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) [2021-06-05 13:41:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:51,029 INFO L93 Difference]: Finished difference Result 8299 states and 30586 transitions. [2021-06-05 13:41:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:51,033 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 27 [2021-06-05 13:41:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:51,048 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 13:41:51,048 INFO L226 Difference]: Without dead ends: 7871 [2021-06-05 13:41:51,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-06-05 13:41:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5590. [2021-06-05 13:41:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5589 states have (on average 3.8017534442655214) internal successors, (21248), 5589 states have internal predecessors, (21248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 21248 transitions. [2021-06-05 13:41:51,133 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 21248 transitions. Word has length 27 [2021-06-05 13:41:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:51,133 INFO L482 AbstractCegarLoop]: Abstraction has 5590 states and 21248 transitions. [2021-06-05 13:41:51,133 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) [2021-06-05 13:41:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 21248 transitions. [2021-06-05 13:41:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:51,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:51,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:51,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 13:41:51,341 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1554761067, now seen corresponding path program 2 times [2021-06-05 13:41:51,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:51,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119664221] [2021-06-05 13:41:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:51,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119664221] [2021-06-05 13:41:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119664221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739294977] [2021-06-05 13:41:51,387 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:51,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:51,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:41:51,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:51,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:51,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:51,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:41:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:51,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739294977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:51,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:41:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626574347] [2021-06-05 13:41:51,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:51,478 INFO L87 Difference]: Start difference. First operand 5590 states and 21248 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-06-05 13:41:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:51,615 INFO L93 Difference]: Finished difference Result 5588 states and 20704 transitions. [2021-06-05 13:41:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:51,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 27 [2021-06-05 13:41:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:51,623 INFO L225 Difference]: With dead ends: 5588 [2021-06-05 13:41:51,623 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 13:41:51,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 13:41:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2021-06-05 13:41:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 3.8068274734260017) internal successors, (18623), 4892 states have internal predecessors, (18623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 18623 transitions. [2021-06-05 13:41:51,685 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 18623 transitions. Word has length 27 [2021-06-05 13:41:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:51,685 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 18623 transitions. [2021-06-05 13:41:51,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-06-05 13:41:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 18623 transitions. [2021-06-05 13:41:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:51,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:51,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:51,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:41:51,894 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 3 times [2021-06-05 13:41:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:51,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788297767] [2021-06-05 13:41:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:51,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788297767] [2021-06-05 13:41:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788297767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164732921] [2021-06-05 13:41:51,999 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:52,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:52,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:52,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:52,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:52,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:52,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:41:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:52,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164732921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:52,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 13:41:52,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657763585] [2021-06-05 13:41:52,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:52,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:52,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:52,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:52,113 INFO L87 Difference]: Start difference. First operand 4893 states and 18623 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:52,346 INFO L93 Difference]: Finished difference Result 5208 states and 19682 transitions. [2021-06-05 13:41:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:41:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:52,356 INFO L225 Difference]: With dead ends: 5208 [2021-06-05 13:41:52,356 INFO L226 Difference]: Without dead ends: 5208 [2021-06-05 13:41:52,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-06-05 13:41:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4755. [2021-06-05 13:41:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4755 states, 4754 states have (on average 3.8029028186790073) internal successors, (18079), 4754 states have internal predecessors, (18079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 18079 transitions. [2021-06-05 13:41:52,449 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 18079 transitions. Word has length 27 [2021-06-05 13:41:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:52,449 INFO L482 AbstractCegarLoop]: Abstraction has 4755 states and 18079 transitions. [2021-06-05 13:41:52,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 18079 transitions. [2021-06-05 13:41:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:41:52,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:52,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:52,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:41:52,672 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:52,672 INFO L82 PathProgramCache]: Analyzing trace with hash 733903001, now seen corresponding path program 4 times [2021-06-05 13:41:52,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:52,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400059162] [2021-06-05 13:41:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:52,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:52,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400059162] [2021-06-05 13:41:52,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400059162] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:52,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:52,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:41:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508201305] [2021-06-05 13:41:52,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:52,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:52,780 INFO L87 Difference]: Start difference. First operand 4755 states and 18079 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-06-05 13:41:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:52,882 INFO L93 Difference]: Finished difference Result 4613 states and 17475 transitions. [2021-06-05 13:41:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 27 [2021-06-05 13:41:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:52,895 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 13:41:52,895 INFO L226 Difference]: Without dead ends: 4453 [2021-06-05 13:41:52,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-06-05 13:41:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4453. [2021-06-05 13:41:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 3.8313117699910153) internal successors, (17057), 4452 states have internal predecessors, (17057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 17057 transitions. [2021-06-05 13:41:52,974 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 17057 transitions. Word has length 27 [2021-06-05 13:41:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:52,975 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 17057 transitions. [2021-06-05 13:41:52,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-06-05 13:41:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 17057 transitions. [2021-06-05 13:41:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:41:52,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:52,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:52,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 13:41:52,982 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-06-05 13:41:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:52,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040469674] [2021-06-05 13:41:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:53,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040469674] [2021-06-05 13:41:53,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040469674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591251301] [2021-06-05 13:41:53,038 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:53,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:53,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:53,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:41:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591251301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:53,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:41:53,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317464653] [2021-06-05 13:41:53,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:53,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:53,224 INFO L87 Difference]: Start difference. First operand 4453 states and 17057 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:54,447 INFO L93 Difference]: Finished difference Result 18250 states and 67488 transitions. [2021-06-05 13:41:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:41:54,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:41:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:54,485 INFO L225 Difference]: With dead ends: 18250 [2021-06-05 13:41:54,485 INFO L226 Difference]: Without dead ends: 17714 [2021-06-05 13:41:54,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:41:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2021-06-05 13:41:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 11055. [2021-06-05 13:41:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 4.028586936855437) internal successors, (44532), 11054 states have internal predecessors, (44532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 44532 transitions. [2021-06-05 13:41:54,763 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 44532 transitions. Word has length 30 [2021-06-05 13:41:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:54,764 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 44532 transitions. [2021-06-05 13:41:54,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 44532 transitions. [2021-06-05 13:41:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:41:54,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:54,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:54,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:54,983 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-06-05 13:41:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:54,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324185529] [2021-06-05 13:41:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:55,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:55,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324185529] [2021-06-05 13:41:55,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324185529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:55,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116091658] [2021-06-05 13:41:55,041 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:55,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:55,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:41:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:55,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:41:55,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:55,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:41:55,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:55,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:41:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:55,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116091658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:55,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:55,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:41:55,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351644943] [2021-06-05 13:41:55,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:55,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:55,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:55,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:55,216 INFO L87 Difference]: Start difference. First operand 11055 states and 44532 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:56,969 INFO L93 Difference]: Finished difference Result 23408 states and 90037 transitions. [2021-06-05 13:41:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:41:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:41:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:57,025 INFO L225 Difference]: With dead ends: 23408 [2021-06-05 13:41:57,025 INFO L226 Difference]: Without dead ends: 22853 [2021-06-05 13:41:57,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 808.8ms TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:41:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2021-06-05 13:41:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 15842. [2021-06-05 13:41:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 4.061738526608169) internal successors, (64342), 15841 states have internal predecessors, (64342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 64342 transitions. [2021-06-05 13:41:57,514 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 64342 transitions. Word has length 30 [2021-06-05 13:41:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:57,514 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 64342 transitions. [2021-06-05 13:41:57,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 64342 transitions. [2021-06-05 13:41:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:41:57,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:57,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:57,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 13:41:57,742 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1834270364, now seen corresponding path program 11 times [2021-06-05 13:41:57,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:57,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458558207] [2021-06-05 13:41:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:57,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458558207] [2021-06-05 13:41:57,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458558207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:57,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14481655] [2021-06-05 13:41:57,793 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:57,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:57,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:57,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14481655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:57,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:57,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 13:41:57,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014466576] [2021-06-05 13:41:57,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:41:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:41:57,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:57,905 INFO L87 Difference]: Start difference. First operand 15842 states and 64342 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:58,233 INFO L93 Difference]: Finished difference Result 23804 states and 95370 transitions. [2021-06-05 13:41:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:58,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:41:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:58,294 INFO L225 Difference]: With dead ends: 23804 [2021-06-05 13:41:58,294 INFO L226 Difference]: Without dead ends: 23752 [2021-06-05 13:41:58,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:41:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23752 states. [2021-06-05 13:41:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23752 to 16213. [2021-06-05 13:41:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16213 states, 16212 states have (on average 4.060880829015544) internal successors, (65835), 16212 states have internal predecessors, (65835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16213 states to 16213 states and 65835 transitions. [2021-06-05 13:41:58,983 INFO L78 Accepts]: Start accepts. Automaton has 16213 states and 65835 transitions. Word has length 30 [2021-06-05 13:41:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:58,983 INFO L482 AbstractCegarLoop]: Abstraction has 16213 states and 65835 transitions. [2021-06-05 13:41:58,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16213 states and 65835 transitions. [2021-06-05 13:41:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:41:59,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:59,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:59,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 13:41:59,212 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:59,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:59,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 12 times [2021-06-05 13:41:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:59,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336271540] [2021-06-05 13:41:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:59,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336271540] [2021-06-05 13:41:59,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336271540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:59,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33896324] [2021-06-05 13:41:59,269 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:59,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:41:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:59,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:59,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33896324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:59,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:59,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:41:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259055621] [2021-06-05 13:41:59,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:41:59,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:59,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:41:59,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:59,407 INFO L87 Difference]: Start difference. First operand 16213 states and 65835 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2021-06-05 13:41:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:59,971 INFO L93 Difference]: Finished difference Result 31221 states and 123338 transitions. [2021-06-05 13:41:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:41:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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 30 [2021-06-05 13:41:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:00,130 INFO L225 Difference]: With dead ends: 31221 [2021-06-05 13:42:00,130 INFO L226 Difference]: Without dead ends: 30782 [2021-06-05 13:42:00,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30782 states. [2021-06-05 13:42:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30782 to 23744. [2021-06-05 13:42:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23744 states, 23743 states have (on average 4.117634671271532) internal successors, (97765), 23743 states have internal predecessors, (97765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23744 states to 23744 states and 97765 transitions. [2021-06-05 13:42:00,832 INFO L78 Accepts]: Start accepts. Automaton has 23744 states and 97765 transitions. Word has length 30 [2021-06-05 13:42:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:00,832 INFO L482 AbstractCegarLoop]: Abstraction has 23744 states and 97765 transitions. [2021-06-05 13:42:00,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2021-06-05 13:42:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 23744 states and 97765 transitions. [2021-06-05 13:42:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:00,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:00,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:01,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:01,068 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -977561994, now seen corresponding path program 13 times [2021-06-05 13:42:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:01,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136146450] [2021-06-05 13:42:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136146450] [2021-06-05 13:42:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136146450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978853750] [2021-06-05 13:42:01,252 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:42:01,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:42:01,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:42:01,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:42:01,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:42:01,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:42:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:01,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978853750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:01,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:01,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:42:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184334536] [2021-06-05 13:42:01,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:01,438 INFO L87 Difference]: Start difference. First operand 23744 states and 97765 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:02,622 INFO L93 Difference]: Finished difference Result 35138 states and 142210 transitions. [2021-06-05 13:42:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:02,718 INFO L225 Difference]: With dead ends: 35138 [2021-06-05 13:42:02,718 INFO L226 Difference]: Without dead ends: 34623 [2021-06-05 13:42:02,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:42:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34623 states. [2021-06-05 13:42:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34623 to 25637. [2021-06-05 13:42:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 4.109065376813856) internal successors, (105340), 25636 states have internal predecessors, (105340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 105340 transitions. [2021-06-05 13:42:03,522 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 105340 transitions. Word has length 30 [2021-06-05 13:42:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:03,523 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 105340 transitions. [2021-06-05 13:42:03,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 105340 transitions. [2021-06-05 13:42:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:03,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:03,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:03,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:42:03,768 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash 986277488, now seen corresponding path program 14 times [2021-06-05 13:42:03,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:03,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003523492] [2021-06-05 13:42:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:03,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:03,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003523492] [2021-06-05 13:42:03,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003523492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:03,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567026405] [2021-06-05 13:42:03,821 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 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 [2021-06-05 13:42:03,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:03,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:03,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:42:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:03,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567026405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:03,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:03,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 13:42:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856543916] [2021-06-05 13:42:03,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:03,937 INFO L87 Difference]: Start difference. First operand 25637 states and 105340 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:04,919 INFO L93 Difference]: Finished difference Result 51004 states and 204742 transitions. [2021-06-05 13:42:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:42:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:05,094 INFO L225 Difference]: With dead ends: 51004 [2021-06-05 13:42:05,094 INFO L226 Difference]: Without dead ends: 50772 [2021-06-05 13:42:05,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50772 states. [2021-06-05 13:42:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50772 to 38308. [2021-06-05 13:42:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.208395332445767) internal successors, (161211), 38307 states have internal predecessors, (161211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 161211 transitions. [2021-06-05 13:42:06,310 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 161211 transitions. Word has length 30 [2021-06-05 13:42:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:06,311 INFO L482 AbstractCegarLoop]: Abstraction has 38308 states and 161211 transitions. [2021-06-05 13:42:06,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 161211 transitions. [2021-06-05 13:42:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:06,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:06,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:06,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:06,833 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1130060142, now seen corresponding path program 15 times [2021-06-05 13:42:06,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:06,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718582353] [2021-06-05 13:42:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:06,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718582353] [2021-06-05 13:42:06,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718582353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890447944] [2021-06-05 13:42:06,875 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 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 [2021-06-05 13:42:06,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:06,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:06,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:42:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:06,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890447944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:06,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:06,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 13:42:06,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642101203] [2021-06-05 13:42:06,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:06,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:06,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:06,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:06,998 INFO L87 Difference]: Start difference. First operand 38308 states and 161211 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:07,852 INFO L93 Difference]: Finished difference Result 45696 states and 184859 transitions. [2021-06-05 13:42:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:08,000 INFO L225 Difference]: With dead ends: 45696 [2021-06-05 13:42:08,000 INFO L226 Difference]: Without dead ends: 45550 [2021-06-05 13:42:08,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45550 states. [2021-06-05 13:42:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45550 to 38454. [2021-06-05 13:42:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38454 states, 38453 states have (on average 4.205341585832055) internal successors, (161708), 38453 states have internal predecessors, (161708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 161708 transitions. [2021-06-05 13:42:09,150 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 161708 transitions. Word has length 30 [2021-06-05 13:42:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:09,150 INFO L482 AbstractCegarLoop]: Abstraction has 38454 states and 161708 transitions. [2021-06-05 13:42:09,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 161708 transitions. [2021-06-05 13:42:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:09,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:09,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:09,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 13:42:09,411 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:09,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1343876520, now seen corresponding path program 16 times [2021-06-05 13:42:09,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:09,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974128093] [2021-06-05 13:42:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:09,657 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 13:42:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:09,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974128093] [2021-06-05 13:42:09,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974128093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:09,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610396711] [2021-06-05 13:42:09,682 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 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 [2021-06-05 13:42:09,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:42:09,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:09,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:42:09,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:42:09,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:42:09,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:42:09,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:42:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:09,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610396711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:09,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:09,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 13:42:09,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904651947] [2021-06-05 13:42:09,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:09,877 INFO L87 Difference]: Start difference. First operand 38454 states and 161708 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:11,627 INFO L93 Difference]: Finished difference Result 55267 states and 223349 transitions. [2021-06-05 13:42:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:42:11,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:11,776 INFO L225 Difference]: With dead ends: 55267 [2021-06-05 13:42:11,776 INFO L226 Difference]: Without dead ends: 54596 [2021-06-05 13:42:11,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 861.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:42:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54596 states. [2021-06-05 13:42:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54596 to 41454. [2021-06-05 13:42:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41454 states, 41453 states have (on average 4.203965937326611) internal successors, (174267), 41453 states have internal predecessors, (174267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41454 states to 41454 states and 174267 transitions. [2021-06-05 13:42:13,352 INFO L78 Accepts]: Start accepts. Automaton has 41454 states and 174267 transitions. Word has length 30 [2021-06-05 13:42:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,352 INFO L482 AbstractCegarLoop]: Abstraction has 41454 states and 174267 transitions. [2021-06-05 13:42:13,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 41454 states and 174267 transitions. [2021-06-05 13:42:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:13,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:42:13,615 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1709456920, now seen corresponding path program 1 times [2021-06-05 13:42:13,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394312125] [2021-06-05 13:42:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394312125] [2021-06-05 13:42:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394312125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478792319] [2021-06-05 13:42:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:42:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:13,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478792319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:13,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 13:42:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196545990] [2021-06-05 13:42:13,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:13,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:13,849 INFO L87 Difference]: Start difference. First operand 41454 states and 174267 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,725 INFO L93 Difference]: Finished difference Result 56968 states and 227845 transitions. [2021-06-05 13:42:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:42:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,891 INFO L225 Difference]: With dead ends: 56968 [2021-06-05 13:42:15,891 INFO L226 Difference]: Without dead ends: 56506 [2021-06-05 13:42:15,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:42:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56506 states. [2021-06-05 13:42:17,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56506 to 42332. [2021-06-05 13:42:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42332 states, 42331 states have (on average 4.198270770829888) internal successors, (177717), 42331 states have internal predecessors, (177717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42332 states to 42332 states and 177717 transitions. [2021-06-05 13:42:17,458 INFO L78 Accepts]: Start accepts. Automaton has 42332 states and 177717 transitions. Word has length 30 [2021-06-05 13:42:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,458 INFO L482 AbstractCegarLoop]: Abstraction has 42332 states and 177717 transitions. [2021-06-05 13:42:17,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42332 states and 177717 transitions. [2021-06-05 13:42:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:17,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:17,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:42:17,728 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,728 INFO L82 PathProgramCache]: Analyzing trace with hash 541122106, now seen corresponding path program 17 times [2021-06-05 13:42:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169368572] [2021-06-05 13:42:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:17,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169368572] [2021-06-05 13:42:17,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169368572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126196327] [2021-06-05 13:42:17,769 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 [2021-06-05 13:42:17,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:42:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126196327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-06-05 13:42:17,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365794897] [2021-06-05 13:42:17,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:17,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:17,881 INFO L87 Difference]: Start difference. First operand 42332 states and 177717 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) [2021-06-05 13:42:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:18,568 INFO L93 Difference]: Finished difference Result 52680 states and 212917 transitions. [2021-06-05 13:42:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:18,569 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 30 [2021-06-05 13:42:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:18,732 INFO L225 Difference]: With dead ends: 52680 [2021-06-05 13:42:18,732 INFO L226 Difference]: Without dead ends: 52640 [2021-06-05 13:42:18,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52640 states. [2021-06-05 13:42:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52640 to 42878. [2021-06-05 13:42:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.208503393427712) internal successors, (180448), 42877 states have internal predecessors, (180448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 180448 transitions. [2021-06-05 13:42:20,358 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 180448 transitions. Word has length 30 [2021-06-05 13:42:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:20,359 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 180448 transitions. [2021-06-05 13:42:20,359 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) [2021-06-05 13:42:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 180448 transitions. [2021-06-05 13:42:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:20,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:20,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:20,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 13:42:20,629 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1494154336, now seen corresponding path program 18 times [2021-06-05 13:42:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425970495] [2021-06-05 13:42:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:20,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:20,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425970495] [2021-06-05 13:42:20,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425970495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570183250] [2021-06-05 13:42:20,668 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 [2021-06-05 13:42:20,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:20,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:42:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:20,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570183250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 13:42:20,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713694586] [2021-06-05 13:42:20,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:20,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:20,842 INFO L87 Difference]: Start difference. First operand 42878 states and 180448 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:22,141 INFO L93 Difference]: Finished difference Result 93945 states and 386209 transitions. [2021-06-05 13:42:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:22,424 INFO L225 Difference]: With dead ends: 93945 [2021-06-05 13:42:22,424 INFO L226 Difference]: Without dead ends: 92826 [2021-06-05 13:42:22,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:42:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92826 states. [2021-06-05 13:42:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92826 to 70922. [2021-06-05 13:42:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70922 states, 70921 states have (on average 4.303647720703318) internal successors, (305219), 70921 states have internal predecessors, (305219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70922 states to 70922 states and 305219 transitions. [2021-06-05 13:42:24,958 INFO L78 Accepts]: Start accepts. Automaton has 70922 states and 305219 transitions. Word has length 30 [2021-06-05 13:42:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:24,958 INFO L482 AbstractCegarLoop]: Abstraction has 70922 states and 305219 transitions. [2021-06-05 13:42:24,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 70922 states and 305219 transitions. [2021-06-05 13:42:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:25,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:25,056 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:25,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:25,261 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1262024518, now seen corresponding path program 19 times [2021-06-05 13:42:25,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:25,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377427089] [2021-06-05 13:42:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:25,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377427089] [2021-06-05 13:42:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377427089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679440308] [2021-06-05 13:42:25,724 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 [2021-06-05 13:42:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:25,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:42:25,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:25,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:42:25,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:42:25,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:42:25,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:42:25,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:42:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:26,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679440308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:26,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:42:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210518440] [2021-06-05 13:42:26,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:26,014 INFO L87 Difference]: Start difference. First operand 70922 states and 305219 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:28,295 INFO L93 Difference]: Finished difference Result 91994 states and 383695 transitions. [2021-06-05 13:42:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:42:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:28,557 INFO L225 Difference]: With dead ends: 91994 [2021-06-05 13:42:28,557 INFO L226 Difference]: Without dead ends: 91128 [2021-06-05 13:42:28,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 864.3ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:42:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91128 states. [2021-06-05 13:42:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91128 to 75370. [2021-06-05 13:42:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75370 states, 75369 states have (on average 4.307619843702318) internal successors, (324661), 75369 states have internal predecessors, (324661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75370 states to 75370 states and 324661 transitions. [2021-06-05 13:42:31,097 INFO L78 Accepts]: Start accepts. Automaton has 75370 states and 324661 transitions. Word has length 30 [2021-06-05 13:42:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:31,097 INFO L482 AbstractCegarLoop]: Abstraction has 75370 states and 324661 transitions. [2021-06-05 13:42:31,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 75370 states and 324661 transitions. [2021-06-05 13:42:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:31,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:31,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:31,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 13:42:31,401 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-06-05 13:42:31,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:31,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726771017] [2021-06-05 13:42:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:31,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726771017] [2021-06-05 13:42:31,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726771017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758831844] [2021-06-05 13:42:31,457 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 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 [2021-06-05 13:42:31,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:42:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:31,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758831844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:31,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 13:42:31,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788118877] [2021-06-05 13:42:31,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:31,584 INFO L87 Difference]: Start difference. First operand 75370 states and 324661 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-06-05 13:42:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:32,883 INFO L93 Difference]: Finished difference Result 98132 states and 416693 transitions. [2021-06-05 13:42:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 30 [2021-06-05 13:42:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:33,176 INFO L225 Difference]: With dead ends: 98132 [2021-06-05 13:42:33,176 INFO L226 Difference]: Without dead ends: 98068 [2021-06-05 13:42:33,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98068 states. [2021-06-05 13:42:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98068 to 90511. [2021-06-05 13:42:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90511 states, 90510 states have (on average 4.326869959120539) internal successors, (391625), 90510 states have internal predecessors, (391625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90511 states to 90511 states and 391625 transitions. [2021-06-05 13:42:36,660 INFO L78 Accepts]: Start accepts. Automaton has 90511 states and 391625 transitions. Word has length 30 [2021-06-05 13:42:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:36,665 INFO L482 AbstractCegarLoop]: Abstraction has 90511 states and 391625 transitions. [2021-06-05 13:42:36,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-06-05 13:42:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 90511 states and 391625 transitions. [2021-06-05 13:42:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:36,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:36,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:37,061 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 476999490, now seen corresponding path program 2 times [2021-06-05 13:42:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654961450] [2021-06-05 13:42:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:37,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:37,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654961450] [2021-06-05 13:42:37,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654961450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497701373] [2021-06-05 13:42:37,111 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 [2021-06-05 13:42:37,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:37,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:42:37,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:37,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497701373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:37,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 13:42:37,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875951153] [2021-06-05 13:42:37,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:37,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:37,246 INFO L87 Difference]: Start difference. First operand 90511 states and 391625 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:38,165 INFO L93 Difference]: Finished difference Result 98511 states and 417660 transitions. [2021-06-05 13:42:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:39,069 INFO L225 Difference]: With dead ends: 98511 [2021-06-05 13:42:39,069 INFO L226 Difference]: Without dead ends: 98337 [2021-06-05 13:42:39,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98337 states. [2021-06-05 13:42:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98337 to 90305. [2021-06-05 13:42:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90305 states, 90304 states have (on average 4.329077338766832) internal successors, (390933), 90304 states have internal predecessors, (390933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90305 states to 90305 states and 390933 transitions. [2021-06-05 13:42:41,946 INFO L78 Accepts]: Start accepts. Automaton has 90305 states and 390933 transitions. Word has length 30 [2021-06-05 13:42:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:41,946 INFO L482 AbstractCegarLoop]: Abstraction has 90305 states and 390933 transitions. [2021-06-05 13:42:41,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 90305 states and 390933 transitions. [2021-06-05 13:42:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:42,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:42,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:42,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 13:42:42,277 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1372991872, now seen corresponding path program 3 times [2021-06-05 13:42:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:42,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379121998] [2021-06-05 13:42:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:42,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379121998] [2021-06-05 13:42:42,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379121998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530940102] [2021-06-05 13:42:42,334 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 [2021-06-05 13:42:42,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:42,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:42:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530940102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:42,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 13:42:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127179998] [2021-06-05 13:42:42,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:42,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:42,495 INFO L87 Difference]: Start difference. First operand 90305 states and 390933 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-06-05 13:42:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:43,953 INFO L93 Difference]: Finished difference Result 102107 states and 432585 transitions. [2021-06-05 13:42:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 30 [2021-06-05 13:42:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:44,305 INFO L225 Difference]: With dead ends: 102107 [2021-06-05 13:42:44,305 INFO L226 Difference]: Without dead ends: 101965 [2021-06-05 13:42:44,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101965 states. [2021-06-05 13:42:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101965 to 90694. [2021-06-05 13:42:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90694 states, 90693 states have (on average 4.332815101496257) internal successors, (392956), 90693 states have internal predecessors, (392956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90694 states to 90694 states and 392956 transitions. [2021-06-05 13:42:47,188 INFO L78 Accepts]: Start accepts. Automaton has 90694 states and 392956 transitions. Word has length 30 [2021-06-05 13:42:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:47,188 INFO L482 AbstractCegarLoop]: Abstraction has 90694 states and 392956 transitions. [2021-06-05 13:42:47,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-06-05 13:42:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 90694 states and 392956 transitions. [2021-06-05 13:42:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:47,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:47,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:48,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 13:42:48,015 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1079688236, now seen corresponding path program 21 times [2021-06-05 13:42:48,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:48,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648822979] [2021-06-05 13:42:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:48,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648822979] [2021-06-05 13:42:48,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648822979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228638610] [2021-06-05 13:42:48,083 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 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 [2021-06-05 13:42:48,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:48,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:42:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:48,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228638610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:48,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:42:48,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8411298] [2021-06-05 13:42:48,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:48,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:48,236 INFO L87 Difference]: Start difference. First operand 90694 states and 392956 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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) [2021-06-05 13:42:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:50,416 INFO L93 Difference]: Finished difference Result 122868 states and 520265 transitions. [2021-06-05 13:42:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:42:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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 30 [2021-06-05 13:42:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:50,858 INFO L225 Difference]: With dead ends: 122868 [2021-06-05 13:42:50,858 INFO L226 Difference]: Without dead ends: 120504 [2021-06-05 13:42:50,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:42:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120504 states. [2021-06-05 13:42:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120504 to 55126. [2021-06-05 13:42:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55126 states, 55125 states have (on average 4.2524444444444445) internal successors, (234416), 55125 states have internal predecessors, (234416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55126 states to 55126 states and 234416 transitions. [2021-06-05 13:42:52,838 INFO L78 Accepts]: Start accepts. Automaton has 55126 states and 234416 transitions. Word has length 30 [2021-06-05 13:42:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:52,839 INFO L482 AbstractCegarLoop]: Abstraction has 55126 states and 234416 transitions. [2021-06-05 13:42:52,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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) [2021-06-05 13:42:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 55126 states and 234416 transitions. [2021-06-05 13:42:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:52,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:52,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:53,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 13:42:53,117 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:53,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:53,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1101625758, now seen corresponding path program 22 times [2021-06-05 13:42:53,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:53,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433117745] [2021-06-05 13:42:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:53,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:53,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433117745] [2021-06-05 13:42:53,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433117745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056007879] [2021-06-05 13:42:53,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:42:53,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:53,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:53,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:42:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:53,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:42:53,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:42:53,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:42:53,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:42:53,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:42:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:53,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056007879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:53,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 13:42:53,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297605897] [2021-06-05 13:42:53,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:53,352 INFO L87 Difference]: Start difference. First operand 55126 states and 234416 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:53,920 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-06-05 13:42:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:55,886 INFO L93 Difference]: Finished difference Result 84592 states and 350525 transitions. [2021-06-05 13:42:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:42:55,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:42:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:56,607 INFO L225 Difference]: With dead ends: 84592 [2021-06-05 13:42:56,607 INFO L226 Difference]: Without dead ends: 83864 [2021-06-05 13:42:56,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1292.5ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:42:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83864 states. [2021-06-05 13:42:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83864 to 68499. [2021-06-05 13:42:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68499 states, 68498 states have (on average 4.276489824520424) internal successors, (292931), 68498 states have internal predecessors, (292931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68499 states to 68499 states and 292931 transitions. [2021-06-05 13:42:58,427 INFO L78 Accepts]: Start accepts. Automaton has 68499 states and 292931 transitions. Word has length 30 [2021-06-05 13:42:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:58,427 INFO L482 AbstractCegarLoop]: Abstraction has 68499 states and 292931 transitions. [2021-06-05 13:42:58,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 68499 states and 292931 transitions. [2021-06-05 13:42:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:42:58,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:58,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:58,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:58,741 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash -356508804, now seen corresponding path program 4 times [2021-06-05 13:42:58,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:58,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945003330] [2021-06-05 13:42:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:58,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:58,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945003330] [2021-06-05 13:42:58,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945003330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35635997] [2021-06-05 13:42:58,846 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 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 [2021-06-05 13:42:58,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:59,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35635997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:59,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 13:42:59,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643131273] [2021-06-05 13:42:59,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:59,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:59,136 INFO L87 Difference]: Start difference. First operand 68499 states and 292931 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:01,831 INFO L93 Difference]: Finished difference Result 89398 states and 368677 transitions. [2021-06-05 13:43:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:43:01,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:02,093 INFO L225 Difference]: With dead ends: 89398 [2021-06-05 13:43:02,093 INFO L226 Difference]: Without dead ends: 88772 [2021-06-05 13:43:02,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 976.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:43:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88772 states. [2021-06-05 13:43:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88772 to 70166. [2021-06-05 13:43:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70166 states, 70165 states have (on average 4.271944701774389) internal successors, (299741), 70165 states have internal predecessors, (299741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70166 states to 70166 states and 299741 transitions. [2021-06-05 13:43:04,430 INFO L78 Accepts]: Start accepts. Automaton has 70166 states and 299741 transitions. Word has length 30 [2021-06-05 13:43:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:04,430 INFO L482 AbstractCegarLoop]: Abstraction has 70166 states and 299741 transitions. [2021-06-05 13:43:04,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 70166 states and 299741 transitions. [2021-06-05 13:43:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:04,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:04,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:04,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:04,749 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash -967659738, now seen corresponding path program 23 times [2021-06-05 13:43:04,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:04,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235503382] [2021-06-05 13:43:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:04,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235503382] [2021-06-05 13:43:04,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235503382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071784872] [2021-06-05 13:43:04,836 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 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 [2021-06-05 13:43:04,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:43:04,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:43:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:05,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071784872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:05,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-06-05 13:43:05,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880314936] [2021-06-05 13:43:05,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:05,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:05,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:05,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:05,035 INFO L87 Difference]: Start difference. First operand 70166 states and 299741 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-06-05 13:43:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:06,683 INFO L93 Difference]: Finished difference Result 107773 states and 448693 transitions. [2021-06-05 13:43:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:43:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 30 [2021-06-05 13:43:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:07,046 INFO L225 Difference]: With dead ends: 107773 [2021-06-05 13:43:07,046 INFO L226 Difference]: Without dead ends: 107773 [2021-06-05 13:43:07,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:43:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107773 states. [2021-06-05 13:43:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107773 to 85136. [2021-06-05 13:43:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85136 states, 85135 states have (on average 4.30706524930992) internal successors, (366682), 85135 states have internal predecessors, (366682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85136 states to 85136 states and 366682 transitions. [2021-06-05 13:43:09,766 INFO L78 Accepts]: Start accepts. Automaton has 85136 states and 366682 transitions. Word has length 30 [2021-06-05 13:43:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:09,766 INFO L482 AbstractCegarLoop]: Abstraction has 85136 states and 366682 transitions. [2021-06-05 13:43:09,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-06-05 13:43:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 85136 states and 366682 transitions. [2021-06-05 13:43:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:09,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:09,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 13:43:10,097 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash 733919980, now seen corresponding path program 24 times [2021-06-05 13:43:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153982113] [2021-06-05 13:43:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:10,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153982113] [2021-06-05 13:43:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153982113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146415533] [2021-06-05 13:43:10,139 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 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 [2021-06-05 13:43:10,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:43:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:10,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146415533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:10,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 13:43:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227826848] [2021-06-05 13:43:10,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:10,291 INFO L87 Difference]: Start difference. First operand 85136 states and 366682 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:12,345 INFO L93 Difference]: Finished difference Result 136874 states and 574741 transitions. [2021-06-05 13:43:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:43:12,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:12,756 INFO L225 Difference]: With dead ends: 136874 [2021-06-05 13:43:12,756 INFO L226 Difference]: Without dead ends: 135508 [2021-06-05 13:43:12,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:43:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135508 states. [2021-06-05 13:43:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135508 to 93986. [2021-06-05 13:43:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93986 states, 93985 states have (on average 4.333212746714901) internal successors, (407257), 93985 states have internal predecessors, (407257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93986 states to 93986 states and 407257 transitions. [2021-06-05 13:43:16,471 INFO L78 Accepts]: Start accepts. Automaton has 93986 states and 407257 transitions. Word has length 30 [2021-06-05 13:43:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:16,471 INFO L482 AbstractCegarLoop]: Abstraction has 93986 states and 407257 transitions. [2021-06-05 13:43:16,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 93986 states and 407257 transitions. [2021-06-05 13:43:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:16,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:16,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:16,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 13:43:16,910 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:16,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1685858338, now seen corresponding path program 25 times [2021-06-05 13:43:16,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:16,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454700767] [2021-06-05 13:43:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:16,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454700767] [2021-06-05 13:43:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454700767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212876704] [2021-06-05 13:43:16,957 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 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 [2021-06-05 13:43:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:17,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:43:17,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:43:17,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:43:17,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:43:17,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:43:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:17,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212876704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:17,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:17,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494278686] [2021-06-05 13:43:17,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:17,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:17,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:17,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:17,163 INFO L87 Difference]: Start difference. First operand 93986 states and 407257 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:20,008 INFO L93 Difference]: Finished difference Result 122538 states and 522164 transitions. [2021-06-05 13:43:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:43:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:20,554 INFO L225 Difference]: With dead ends: 122538 [2021-06-05 13:43:20,554 INFO L226 Difference]: Without dead ends: 122036 [2021-06-05 13:43:20,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:43:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122036 states. [2021-06-05 13:43:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122036 to 107696. [2021-06-05 13:43:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.352569757184642) internal successors, (468750), 107695 states have internal predecessors, (468750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 468750 transitions. [2021-06-05 13:43:23,716 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 468750 transitions. Word has length 30 [2021-06-05 13:43:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:23,716 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 468750 transitions. [2021-06-05 13:43:23,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 468750 transitions. [2021-06-05 13:43:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:24,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:24,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:24,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:24,733 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:24,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1675959326, now seen corresponding path program 5 times [2021-06-05 13:43:24,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:24,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031246722] [2021-06-05 13:43:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:24,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:24,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031246722] [2021-06-05 13:43:24,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031246722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350251529] [2021-06-05 13:43:24,791 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 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 [2021-06-05 13:43:24,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:24,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:43:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:24,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350251529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:24,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 13:43:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229134074] [2021-06-05 13:43:24,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:24,943 INFO L87 Difference]: Start difference. First operand 107696 states and 468750 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-06-05 13:43:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:27,046 INFO L93 Difference]: Finished difference Result 152595 states and 646553 transitions. [2021-06-05 13:43:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 30 [2021-06-05 13:43:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:27,632 INFO L225 Difference]: With dead ends: 152595 [2021-06-05 13:43:27,632 INFO L226 Difference]: Without dead ends: 152595 [2021-06-05 13:43:27,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:43:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152595 states. [2021-06-05 13:43:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152595 to 126512. [2021-06-05 13:43:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126512 states, 126511 states have (on average 4.371912323829548) internal successors, (553095), 126511 states have internal predecessors, (553095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126512 states to 126512 states and 553095 transitions. [2021-06-05 13:43:31,981 INFO L78 Accepts]: Start accepts. Automaton has 126512 states and 553095 transitions. Word has length 30 [2021-06-05 13:43:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:31,981 INFO L482 AbstractCegarLoop]: Abstraction has 126512 states and 553095 transitions. [2021-06-05 13:43:31,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-06-05 13:43:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand 126512 states and 553095 transitions. [2021-06-05 13:43:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:32,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:32,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:32,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 13:43:32,374 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1840643646, now seen corresponding path program 26 times [2021-06-05 13:43:32,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:32,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624955012] [2021-06-05 13:43:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624955012] [2021-06-05 13:43:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624955012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763052002] [2021-06-05 13:43:32,422 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 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 [2021-06-05 13:43:32,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:32,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:32,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763052002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:32,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:32,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180956912] [2021-06-05 13:43:32,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:32,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:32,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:32,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:32,593 INFO L87 Difference]: Start difference. First operand 126512 states and 553095 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:34,487 INFO L93 Difference]: Finished difference Result 141394 states and 612178 transitions. [2021-06-05 13:43:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:35,026 INFO L225 Difference]: With dead ends: 141394 [2021-06-05 13:43:35,026 INFO L226 Difference]: Without dead ends: 141322 [2021-06-05 13:43:35,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:43:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141322 states. [2021-06-05 13:43:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141322 to 126703. [2021-06-05 13:43:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126703 states, 126702 states have (on average 4.370017837129643) internal successors, (553690), 126702 states have internal predecessors, (553690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126703 states to 126703 states and 553690 transitions. [2021-06-05 13:43:39,372 INFO L78 Accepts]: Start accepts. Automaton has 126703 states and 553690 transitions. Word has length 30 [2021-06-05 13:43:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:39,372 INFO L482 AbstractCegarLoop]: Abstraction has 126703 states and 553690 transitions. [2021-06-05 13:43:39,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 126703 states and 553690 transitions. [2021-06-05 13:43:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:39,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:39,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:39,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:39,743 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:39,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1447640776, now seen corresponding path program 27 times [2021-06-05 13:43:39,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:39,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956309464] [2021-06-05 13:43:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:39,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956309464] [2021-06-05 13:43:39,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956309464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269103624] [2021-06-05 13:43:39,788 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 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 [2021-06-05 13:43:39,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:43:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:39,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:39,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269103624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:39,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:39,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821669932] [2021-06-05 13:43:39,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:39,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:39,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:39,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:39,930 INFO L87 Difference]: Start difference. First operand 126703 states and 553690 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:41,663 INFO L93 Difference]: Finished difference Result 141176 states and 611517 transitions. [2021-06-05 13:43:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:42,210 INFO L225 Difference]: With dead ends: 141176 [2021-06-05 13:43:42,211 INFO L226 Difference]: Without dead ends: 141132 [2021-06-05 13:43:42,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:43:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141132 states. [2021-06-05 13:43:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141132 to 126705. [2021-06-05 13:43:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126705 states, 126704 states have (on average 4.370067243338806) internal successors, (553705), 126704 states have internal predecessors, (553705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126705 states to 126705 states and 553705 transitions. [2021-06-05 13:43:46,358 INFO L78 Accepts]: Start accepts. Automaton has 126705 states and 553705 transitions. Word has length 30 [2021-06-05 13:43:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:46,358 INFO L482 AbstractCegarLoop]: Abstraction has 126705 states and 553705 transitions. [2021-06-05 13:43:46,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 126705 states and 553705 transitions. [2021-06-05 13:43:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:46,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:46,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:46,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 13:43:46,743 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:46,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1706436100, now seen corresponding path program 28 times [2021-06-05 13:43:46,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:46,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031770116] [2021-06-05 13:43:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:46,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031770116] [2021-06-05 13:43:46,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031770116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746729547] [2021-06-05 13:43:46,825 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 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 [2021-06-05 13:43:46,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:46,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:47,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:43:47,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:43:47,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:43:47,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:43:47,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 13:43:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:47,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746729547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:47,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:47,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241795969] [2021-06-05 13:43:47,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:47,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:47,116 INFO L87 Difference]: Start difference. First operand 126705 states and 553705 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:50,326 INFO L93 Difference]: Finished difference Result 149894 states and 645986 transitions. [2021-06-05 13:43:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:43:50,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:51,105 INFO L225 Difference]: With dead ends: 149894 [2021-06-05 13:43:51,105 INFO L226 Difference]: Without dead ends: 149494 [2021-06-05 13:43:51,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 872.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:43:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149494 states. [2021-06-05 13:43:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149494 to 129512. [2021-06-05 13:43:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129512 states, 129511 states have (on average 4.370130722486893) internal successors, (565980), 129511 states have internal predecessors, (565980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129512 states to 129512 states and 565980 transitions. [2021-06-05 13:43:55,643 INFO L78 Accepts]: Start accepts. Automaton has 129512 states and 565980 transitions. Word has length 30 [2021-06-05 13:43:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:55,643 INFO L482 AbstractCegarLoop]: Abstraction has 129512 states and 565980 transitions. [2021-06-05 13:43:55,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 129512 states and 565980 transitions. [2021-06-05 13:43:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:43:55,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:55,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:55,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:43:55,998 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash 461248004, now seen corresponding path program 29 times [2021-06-05 13:43:55,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:55,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064284049] [2021-06-05 13:43:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:56,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064284049] [2021-06-05 13:43:56,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064284049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043513942] [2021-06-05 13:43:56,044 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 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 [2021-06-05 13:43:56,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:43:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:56,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043513942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:56,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:43:56,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231530578] [2021-06-05 13:43:56,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:56,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:56,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:56,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:56,205 INFO L87 Difference]: Start difference. First operand 129512 states and 565980 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:59,572 INFO L93 Difference]: Finished difference Result 214461 states and 912367 transitions. [2021-06-05 13:43:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:43:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:43:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:00,421 INFO L225 Difference]: With dead ends: 214461 [2021-06-05 13:44:00,421 INFO L226 Difference]: Without dead ends: 212520 [2021-06-05 13:44:00,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:44:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212520 states. [2021-06-05 13:44:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212520 to 132616. [2021-06-05 13:44:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132615 states have (on average 4.362892583795197) internal successors, (578585), 132615 states have internal predecessors, (578585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 578585 transitions. [2021-06-05 13:44:05,332 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 578585 transitions. Word has length 30 [2021-06-05 13:44:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:05,332 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 578585 transitions. [2021-06-05 13:44:05,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 578585 transitions. [2021-06-05 13:44:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:44:06,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:06,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:06,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:06,379 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1201227792, now seen corresponding path program 30 times [2021-06-05 13:44:06,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:06,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999782646] [2021-06-05 13:44:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:06,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999782646] [2021-06-05 13:44:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999782646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513945080] [2021-06-05 13:44:06,428 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 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 [2021-06-05 13:44:06,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:44:06,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:06,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513945080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:06,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 13:44:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470119576] [2021-06-05 13:44:06,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:06,553 INFO L87 Difference]: Start difference. First operand 132616 states and 578585 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:10,291 INFO L93 Difference]: Finished difference Result 300250 states and 1286549 transitions. [2021-06-05 13:44:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:44:10,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:44:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:11,569 INFO L225 Difference]: With dead ends: 300250 [2021-06-05 13:44:11,569 INFO L226 Difference]: Without dead ends: 300250 [2021-06-05 13:44:11,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:44:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300250 states. [2021-06-05 13:44:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300250 to 212691. [2021-06-05 13:44:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212691 states, 212690 states have (on average 4.4037519394423805) internal successors, (936634), 212690 states have internal predecessors, (936634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212691 states to 212691 states and 936634 transitions. [2021-06-05 13:44:19,836 INFO L78 Accepts]: Start accepts. Automaton has 212691 states and 936634 transitions. Word has length 30 [2021-06-05 13:44:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:19,836 INFO L482 AbstractCegarLoop]: Abstraction has 212691 states and 936634 transitions. [2021-06-05 13:44:19,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 212691 states and 936634 transitions. [2021-06-05 13:44:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:44:20,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:20,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:20,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:20,266 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1407643986, now seen corresponding path program 31 times [2021-06-05 13:44:20,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:20,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839194891] [2021-06-05 13:44:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:20,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839194891] [2021-06-05 13:44:20,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839194891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855851553] [2021-06-05 13:44:20,322 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 [2021-06-05 13:44:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:20,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:20,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 13:44:20,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:44:20,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:44:20,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:44:20,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-06-05 13:44:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:20,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855851553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:20,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:44:20,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16701626] [2021-06-05 13:44:20,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:44:20,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:20,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:44:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:20,501 INFO L87 Difference]: Start difference. First operand 212691 states and 936634 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:26,363 INFO L93 Difference]: Finished difference Result 282236 states and 1220316 transitions. [2021-06-05 13:44:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:44:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:44:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:28,223 INFO L225 Difference]: With dead ends: 282236 [2021-06-05 13:44:28,223 INFO L226 Difference]: Without dead ends: 281826 [2021-06-05 13:44:28,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1682.5ms TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:44:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281826 states. [2021-06-05 13:44:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281826 to 224350. [2021-06-05 13:44:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224350 states, 224349 states have (on average 4.40408916464972) internal successors, (988053), 224349 states have internal predecessors, (988053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224350 states to 224350 states and 988053 transitions. [2021-06-05 13:44:36,330 INFO L78 Accepts]: Start accepts. Automaton has 224350 states and 988053 transitions. Word has length 30 [2021-06-05 13:44:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:36,330 INFO L482 AbstractCegarLoop]: Abstraction has 224350 states and 988053 transitions. [2021-06-05 13:44:36,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 224350 states and 988053 transitions. [2021-06-05 13:44:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:44:36,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:36,627 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:36,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:36,828 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1625498796, now seen corresponding path program 32 times [2021-06-05 13:44:36,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358032484] [2021-06-05 13:44:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:36,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358032484] [2021-06-05 13:44:36,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358032484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046695760] [2021-06-05 13:44:36,875 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 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 [2021-06-05 13:44:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:37,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046695760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:37,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:44:37,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277978473] [2021-06-05 13:44:37,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:44:37,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:44:37,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:37,043 INFO L87 Difference]: Start difference. First operand 224350 states and 988053 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:43,818 INFO L93 Difference]: Finished difference Result 486397 states and 2091172 transitions. [2021-06-05 13:44:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:44:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 13:44:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:46,684 INFO L225 Difference]: With dead ends: 486397 [2021-06-05 13:44:46,685 INFO L226 Difference]: Without dead ends: 483934 [2021-06-05 13:44:46,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1393.0ms TimeCoverageRelationStatistics Valid=1330, Invalid=5810, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:44:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483934 states. [2021-06-05 13:44:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483934 to 267199. [2021-06-05 13:44:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267199 states, 267198 states have (on average 4.399258227980749) internal successors, (1175473), 267198 states have internal predecessors, (1175473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267199 states to 267199 states and 1175473 transitions. [2021-06-05 13:44:59,598 INFO L78 Accepts]: Start accepts. Automaton has 267199 states and 1175473 transitions. Word has length 30 [2021-06-05 13:44:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,598 INFO L482 AbstractCegarLoop]: Abstraction has 267199 states and 1175473 transitions. [2021-06-05 13:44:59,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 267199 states and 1175473 transitions. [2021-06-05 13:44:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 13:44:59,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:00,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:00,135 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash -154432502, now seen corresponding path program 33 times [2021-06-05 13:45:00,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:00,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583139666] [2021-06-05 13:45:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:00,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583139666] [2021-06-05 13:45:00,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583139666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654755965] [2021-06-05 13:45:00,186 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 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 [2021-06-05 13:45:00,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:45:00,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654755965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:00,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:45:00,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307188325] [2021-06-05 13:45:00,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:00,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:00,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:00,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:00,322 INFO L87 Difference]: Start difference. First operand 267199 states and 1175473 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-06-05 13:45:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:04,716 INFO L93 Difference]: Finished difference Result 404661 states and 1760197 transitions. [2021-06-05 13:45:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:45:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 30 [2021-06-05 13:45:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:07,353 INFO L225 Difference]: With dead ends: 404661 [2021-06-05 13:45:07,354 INFO L226 Difference]: Without dead ends: 403634 [2021-06-05 13:45:07,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:45:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403634 states. [2021-06-05 13:45:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403634 to 196954. [2021-06-05 13:45:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196954 states, 196953 states have (on average 4.401897914730926) internal successors, (866967), 196953 states have internal predecessors, (866967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196954 states to 196954 states and 866967 transitions. [2021-06-05 13:45:15,810 INFO L78 Accepts]: Start accepts. Automaton has 196954 states and 866967 transitions. Word has length 30 [2021-06-05 13:45:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:15,810 INFO L482 AbstractCegarLoop]: Abstraction has 196954 states and 866967 transitions. [2021-06-05 13:45:15,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-06-05 13:45:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 196954 states and 866967 transitions. [2021-06-05 13:45:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:45:16,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:16,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:16,392 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1759456308, now seen corresponding path program 34 times [2021-06-05 13:45:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066795317] [2021-06-05 13:45:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:45:16,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066795317] [2021-06-05 13:45:16,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066795317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252686494] [2021-06-05 13:45:16,491 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 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 [2021-06-05 13:45:16,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:45:16,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252686494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:45:16,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953197838] [2021-06-05 13:45:16,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:16,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:16,669 INFO L87 Difference]: Start difference. First operand 196954 states and 866967 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-06-05 13:45:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:19,349 INFO L93 Difference]: Finished difference Result 299970 states and 1308288 transitions. [2021-06-05 13:45:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 33 [2021-06-05 13:45:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:22,028 INFO L225 Difference]: With dead ends: 299970 [2021-06-05 13:45:22,028 INFO L226 Difference]: Without dead ends: 297610 [2021-06-05 13:45:22,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297610 states. [2021-06-05 13:45:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297610 to 245260. [2021-06-05 13:45:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245260 states, 245259 states have (on average 4.444477063023172) internal successors, (1090048), 245259 states have internal predecessors, (1090048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245260 states to 245260 states and 1090048 transitions. [2021-06-05 13:45:31,971 INFO L78 Accepts]: Start accepts. Automaton has 245260 states and 1090048 transitions. Word has length 33 [2021-06-05 13:45:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,971 INFO L482 AbstractCegarLoop]: Abstraction has 245260 states and 1090048 transitions. [2021-06-05 13:45:31,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-06-05 13:45:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 245260 states and 1090048 transitions. [2021-06-05 13:45:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:45:32,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:32,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:32,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 13:45:32,527 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash -843323476, now seen corresponding path program 1 times [2021-06-05 13:45:32,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:32,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129135522] [2021-06-05 13:45:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129135522] [2021-06-05 13:45:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129135522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667890979] [2021-06-05 13:45:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:45:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:45:32,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:45:32,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:45:32,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:45:32,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:45:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667890979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:32,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 13:45:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733353495] [2021-06-05 13:45:32,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:32,782 INFO L87 Difference]: Start difference. First operand 245260 states and 1090048 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:36,093 INFO L93 Difference]: Finished difference Result 248659 states and 1102596 transitions. [2021-06-05 13:45:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:36,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:45:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:37,166 INFO L225 Difference]: With dead ends: 248659 [2021-06-05 13:45:37,167 INFO L226 Difference]: Without dead ends: 248539 [2021-06-05 13:45:37,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248539 states. [2021-06-05 13:45:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248539 to 247204. [2021-06-05 13:45:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247204 states, 247203 states have (on average 4.439096612905183) internal successors, (1097358), 247203 states have internal predecessors, (1097358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247204 states to 247204 states and 1097358 transitions. [2021-06-05 13:45:45,218 INFO L78 Accepts]: Start accepts. Automaton has 247204 states and 1097358 transitions. Word has length 33 [2021-06-05 13:45:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:45,218 INFO L482 AbstractCegarLoop]: Abstraction has 247204 states and 1097358 transitions. [2021-06-05 13:45:45,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 247204 states and 1097358 transitions. [2021-06-05 13:45:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:45:45,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:45,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:45,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 13:45:45,782 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1857877874, now seen corresponding path program 1 times [2021-06-05 13:45:45,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:45,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418320978] [2021-06-05 13:45:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:45,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:45,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418320978] [2021-06-05 13:45:45,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418320978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125099974] [2021-06-05 13:45:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:45:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125099974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:45:46,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398785985] [2021-06-05 13:45:46,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:45:46,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:45:46,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:46,123 INFO L87 Difference]: Start difference. First operand 247204 states and 1097358 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:49,363 INFO L93 Difference]: Finished difference Result 249510 states and 1105535 transitions. [2021-06-05 13:45:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:49,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:45:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:50,324 INFO L225 Difference]: With dead ends: 249510 [2021-06-05 13:45:50,324 INFO L226 Difference]: Without dead ends: 248501 [2021-06-05 13:45:50,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 324.1ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248501 states. [2021-06-05 13:45:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248501 to 247941. [2021-06-05 13:45:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247941 states, 247940 states have (on average 4.436609663628297) internal successors, (1100013), 247940 states have internal predecessors, (1100013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247941 states to 247941 states and 1100013 transitions. [2021-06-05 13:45:58,399 INFO L78 Accepts]: Start accepts. Automaton has 247941 states and 1100013 transitions. Word has length 33 [2021-06-05 13:45:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:58,399 INFO L482 AbstractCegarLoop]: Abstraction has 247941 states and 1100013 transitions. [2021-06-05 13:45:58,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 247941 states and 1100013 transitions. [2021-06-05 13:45:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:45:58,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:58,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:58,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:58,968 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1129985132, now seen corresponding path program 2 times [2021-06-05 13:45:58,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:58,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838320244] [2021-06-05 13:45:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:59,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:59,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838320244] [2021-06-05 13:45:59,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838320244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040441710] [2021-06-05 13:45:59,056 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 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 [2021-06-05 13:45:59,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:59,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:59,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:45:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 13:45:59,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:45:59,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:45:59,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:45:59,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 13:45:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:59,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040441710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:59,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 13:45:59,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329514296] [2021-06-05 13:45:59,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:59,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:59,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:59,193 INFO L87 Difference]: Start difference. First operand 247941 states and 1100013 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:02,538 INFO L93 Difference]: Finished difference Result 258027 states and 1137213 transitions. [2021-06-05 13:46:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:46:02,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:46:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:03,621 INFO L225 Difference]: With dead ends: 258027 [2021-06-05 13:46:03,621 INFO L226 Difference]: Without dead ends: 257921 [2021-06-05 13:46:03,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:46:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257921 states. [2021-06-05 13:46:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257921 to 249856. [2021-06-05 13:46:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249856 states, 249855 states have (on average 4.432294730943948) internal successors, (1107431), 249855 states have internal predecessors, (1107431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249856 states to 249856 states and 1107431 transitions. [2021-06-05 13:46:12,569 INFO L78 Accepts]: Start accepts. Automaton has 249856 states and 1107431 transitions. Word has length 33 [2021-06-05 13:46:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:12,569 INFO L482 AbstractCegarLoop]: Abstraction has 249856 states and 1107431 transitions. [2021-06-05 13:46:12,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 249856 states and 1107431 transitions. [2021-06-05 13:46:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:46:13,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:13,139 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:13,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 13:46:13,353 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448618, now seen corresponding path program 2 times [2021-06-05 13:46:13,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:13,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537765542] [2021-06-05 13:46:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:13,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:13,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537765542] [2021-06-05 13:46:13,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537765542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065351248] [2021-06-05 13:46:13,513 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 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 [2021-06-05 13:46:13,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:13,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:13,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065351248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:13,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:46:13,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509065604] [2021-06-05 13:46:13,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:13,745 INFO L87 Difference]: Start difference. First operand 249856 states and 1107431 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:18,131 INFO L93 Difference]: Finished difference Result 251203 states and 1111360 transitions. [2021-06-05 13:46:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:46:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:19,939 INFO L225 Difference]: With dead ends: 251203 [2021-06-05 13:46:19,940 INFO L226 Difference]: Without dead ends: 250188 [2021-06-05 13:46:19,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:46:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250188 states. [2021-06-05 13:46:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250188 to 249232. [2021-06-05 13:46:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249232 states, 249231 states have (on average 4.431382933904691) internal successors, (1104438), 249231 states have internal predecessors, (1104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249232 states to 249232 states and 1104438 transitions. [2021-06-05 13:46:28,011 INFO L78 Accepts]: Start accepts. Automaton has 249232 states and 1104438 transitions. Word has length 33 [2021-06-05 13:46:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:28,011 INFO L482 AbstractCegarLoop]: Abstraction has 249232 states and 1104438 transitions. [2021-06-05 13:46:28,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 249232 states and 1104438 transitions. [2021-06-05 13:46:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:46:28,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:28,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:28,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,593 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1947467614, now seen corresponding path program 3 times [2021-06-05 13:46:28,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:28,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163785132] [2021-06-05 13:46:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:28,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163785132] [2021-06-05 13:46:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163785132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519403673] [2021-06-05 13:46:28,708 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 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 [2021-06-05 13:46:28,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:28,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:28,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519403673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:28,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:46:28,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232872041] [2021-06-05 13:46:28,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:28,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:28,934 INFO L87 Difference]: Start difference. First operand 249232 states and 1104438 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:32,497 INFO L93 Difference]: Finished difference Result 253243 states and 1118843 transitions. [2021-06-05 13:46:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:46:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:33,588 INFO L225 Difference]: With dead ends: 253243 [2021-06-05 13:46:33,588 INFO L226 Difference]: Without dead ends: 251565 [2021-06-05 13:46:33,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1123.6ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:46:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251565 states. [2021-06-05 13:46:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251565 to 250713. [2021-06-05 13:46:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250713 states, 250712 states have (on average 4.423908707999617) internal successors, (1109127), 250712 states have internal predecessors, (1109127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250713 states to 250713 states and 1109127 transitions. [2021-06-05 13:46:41,505 INFO L78 Accepts]: Start accepts. Automaton has 250713 states and 1109127 transitions. Word has length 33 [2021-06-05 13:46:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:41,505 INFO L482 AbstractCegarLoop]: Abstraction has 250713 states and 1109127 transitions. [2021-06-05 13:46:41,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 250713 states and 1109127 transitions. [2021-06-05 13:46:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:46:41,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:41,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:42,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-05 13:46:42,048 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1681201706, now seen corresponding path program 35 times [2021-06-05 13:46:42,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:42,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686337785] [2021-06-05 13:46:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:46:42,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686337785] [2021-06-05 13:46:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686337785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173315056] [2021-06-05 13:46:42,125 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 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 [2021-06-05 13:46:42,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:42,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:46:42,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173315056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:42,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:46:42,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058284947] [2021-06-05 13:46:42,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:42,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:42,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:42,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:42,298 INFO L87 Difference]: Start difference. First operand 250713 states and 1109127 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:47,006 INFO L93 Difference]: Finished difference Result 408902 states and 1783714 transitions. [2021-06-05 13:46:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:46:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:48,785 INFO L225 Difference]: With dead ends: 408902 [2021-06-05 13:46:48,785 INFO L226 Difference]: Without dead ends: 403086 [2021-06-05 13:46:48,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403086 states. [2021-06-05 13:47:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403086 to 323030. [2021-06-05 13:47:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323030 states, 323029 states have (on average 4.426342526522387) internal successors, (1429837), 323029 states have internal predecessors, (1429837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323030 states to 323030 states and 1429837 transitions. [2021-06-05 13:47:03,755 INFO L78 Accepts]: Start accepts. Automaton has 323030 states and 1429837 transitions. Word has length 33 [2021-06-05 13:47:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:03,755 INFO L482 AbstractCegarLoop]: Abstraction has 323030 states and 1429837 transitions. [2021-06-05 13:47:03,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 323030 states and 1429837 transitions. [2021-06-05 13:47:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:47:04,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:04,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:04,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:04,430 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:04,431 INFO L82 PathProgramCache]: Analyzing trace with hash -913135154, now seen corresponding path program 36 times [2021-06-05 13:47:04,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:04,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540196389] [2021-06-05 13:47:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:47:04,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540196389] [2021-06-05 13:47:04,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540196389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031983989] [2021-06-05 13:47:04,509 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 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 [2021-06-05 13:47:04,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:04,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:47:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:04,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031983989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:04,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-06-05 13:47:04,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852795649] [2021-06-05 13:47:04,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:04,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:04,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:04,785 INFO L87 Difference]: Start difference. First operand 323030 states and 1429837 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:05,985 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-06-05 13:47:13,613 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-06-05 13:47:16,067 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-06-05 13:47:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:17,278 INFO L93 Difference]: Finished difference Result 564498 states and 2414011 transitions. [2021-06-05 13:47:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 13:47:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:47:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:20,487 INFO L225 Difference]: With dead ends: 564498 [2021-06-05 13:47:20,487 INFO L226 Difference]: Without dead ends: 555301 [2021-06-05 13:47:20,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 6398.0ms TimeCoverageRelationStatistics Valid=3771, Invalid=24959, Unknown=0, NotChecked=0, Total=28730 [2021-06-05 13:47:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555301 states. [2021-06-05 13:47:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555301 to 426258. [2021-06-05 13:47:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426258 states, 426257 states have (on average 4.406536432246274) internal successors, (1878317), 426257 states have internal predecessors, (1878317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426258 states to 426258 states and 1878317 transitions. [2021-06-05 13:47:40,863 INFO L78 Accepts]: Start accepts. Automaton has 426258 states and 1878317 transitions. Word has length 33 [2021-06-05 13:47:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:40,863 INFO L482 AbstractCegarLoop]: Abstraction has 426258 states and 1878317 transitions. [2021-06-05 13:47:40,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 426258 states and 1878317 transitions. [2021-06-05 13:47:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:47:41,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:41,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:41,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:41,791 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash -261102064, now seen corresponding path program 37 times [2021-06-05 13:47:41,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:41,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051378503] [2021-06-05 13:47:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:47:41,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:41,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051378503] [2021-06-05 13:47:41,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051378503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260895939] [2021-06-05 13:47:41,864 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 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 [2021-06-05 13:47:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:47:42,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260895939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:42,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:47:42,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490559191] [2021-06-05 13:47:42,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:42,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:42,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:42,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:42,016 INFO L87 Difference]: Start difference. First operand 426258 states and 1878317 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) [2021-06-05 13:47:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:48,179 INFO L93 Difference]: Finished difference Result 512157 states and 2229861 transitions. [2021-06-05 13:47:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:47:48,179 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 33 [2021-06-05 13:47:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:52,359 INFO L225 Difference]: With dead ends: 512157 [2021-06-05 13:47:52,359 INFO L226 Difference]: Without dead ends: 504596 [2021-06-05 13:47:52,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504596 states. [2021-06-05 13:48:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504596 to 450713. [2021-06-05 13:48:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450713 states, 450712 states have (on average 4.414107012904028) internal successors, (1989491), 450712 states have internal predecessors, (1989491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450713 states to 450713 states and 1989491 transitions. [2021-06-05 13:48:12,139 INFO L78 Accepts]: Start accepts. Automaton has 450713 states and 1989491 transitions. Word has length 33 [2021-06-05 13:48:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:12,140 INFO L482 AbstractCegarLoop]: Abstraction has 450713 states and 1989491 transitions. [2021-06-05 13:48:12,140 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) [2021-06-05 13:48:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 450713 states and 1989491 transitions. [2021-06-05 13:48:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:48:12,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:12,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:13,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:13,124 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -766822484, now seen corresponding path program 1 times [2021-06-05 13:48:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:13,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452678823] [2021-06-05 13:48:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:13,889 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 13:48:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:13,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:13,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452678823] [2021-06-05 13:48:13,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452678823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:13,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054991636] [2021-06-05 13:48:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:48:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:48:14,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:14,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 13:48:14,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:48:14,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:48:14,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:48:14,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 13:48:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:14,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054991636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:14,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:14,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:48:14,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285030113] [2021-06-05 13:48:14,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:14,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:14,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:14,137 INFO L87 Difference]: Start difference. First operand 450713 states and 1989491 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:19,017 INFO L93 Difference]: Finished difference Result 464985 states and 2044238 transitions. [2021-06-05 13:48:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:48:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:48:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:22,116 INFO L225 Difference]: With dead ends: 464985 [2021-06-05 13:48:22,116 INFO L226 Difference]: Without dead ends: 464885 [2021-06-05 13:48:22,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1127.0ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464885 states. [2021-06-05 13:48:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464885 to 456514. [2021-06-05 13:48:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456514 states, 456513 states have (on average 4.410663004120365) internal successors, (2013525), 456513 states have internal predecessors, (2013525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456514 states to 456514 states and 2013525 transitions. [2021-06-05 13:48:40,966 INFO L78 Accepts]: Start accepts. Automaton has 456514 states and 2013525 transitions. Word has length 33 [2021-06-05 13:48:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:40,966 INFO L482 AbstractCegarLoop]: Abstraction has 456514 states and 2013525 transitions. [2021-06-05 13:48:40,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 456514 states and 2013525 transitions. [2021-06-05 13:48:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:48:42,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:42,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:42,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 13:48:42,745 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash 149310348, now seen corresponding path program 1 times [2021-06-05 13:48:42,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:42,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622190028] [2021-06-05 13:48:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:42,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:42,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622190028] [2021-06-05 13:48:42,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622190028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:42,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938216811] [2021-06-05 13:48:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:48:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:48:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:43,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938216811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:43,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:48:43,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168253670] [2021-06-05 13:48:43,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:48:43,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:48:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:48:43,232 INFO L87 Difference]: Start difference. First operand 456514 states and 2013525 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:51,438 INFO L93 Difference]: Finished difference Result 472414 states and 2075820 transitions. [2021-06-05 13:48:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:48:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:48:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:56,346 INFO L225 Difference]: With dead ends: 472414 [2021-06-05 13:48:56,346 INFO L226 Difference]: Without dead ends: 471727 [2021-06-05 13:48:56,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471727 states. [2021-06-05 13:49:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471727 to 467183. [2021-06-05 13:49:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467183 states, 467182 states have (on average 4.405914611436228) internal successors, (2058364), 467182 states have internal predecessors, (2058364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467183 states to 467183 states and 2058364 transitions. [2021-06-05 13:49:15,879 INFO L78 Accepts]: Start accepts. Automaton has 467183 states and 2058364 transitions. Word has length 33 [2021-06-05 13:49:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:15,879 INFO L482 AbstractCegarLoop]: Abstraction has 467183 states and 2058364 transitions. [2021-06-05 13:49:15,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 467183 states and 2058364 transitions. [2021-06-05 13:49:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:49:17,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:17,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:17,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:17,553 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1888066322, now seen corresponding path program 2 times [2021-06-05 13:49:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317154130] [2021-06-05 13:49:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:17,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:17,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317154130] [2021-06-05 13:49:17,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317154130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:17,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430807177] [2021-06-05 13:49:17,754 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 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 [2021-06-05 13:49:17,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:17,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:49:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:17,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:49:17,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:49:17,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:49:17,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:49:17,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:49:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:17,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430807177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:17,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:17,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:49:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294814120] [2021-06-05 13:49:17,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:17,919 INFO L87 Difference]: Start difference. First operand 467183 states and 2058364 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:18,817 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-06-05 13:49:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:25,279 INFO L93 Difference]: Finished difference Result 463049 states and 2040755 transitions. [2021-06-05 13:49:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:49:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:49:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:30,220 INFO L225 Difference]: With dead ends: 463049 [2021-06-05 13:49:30,221 INFO L226 Difference]: Without dead ends: 462788 [2021-06-05 13:49:30,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 994.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:49:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462788 states. [2021-06-05 13:49:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462788 to 461080. [2021-06-05 13:49:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461080 states, 461079 states have (on average 4.4107495678614725) internal successors, (2033704), 461079 states have internal predecessors, (2033704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461080 states to 461080 states and 2033704 transitions. [2021-06-05 13:49:48,747 INFO L78 Accepts]: Start accepts. Automaton has 461080 states and 2033704 transitions. Word has length 33 [2021-06-05 13:49:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:48,748 INFO L482 AbstractCegarLoop]: Abstraction has 461080 states and 2033704 transitions. [2021-06-05 13:49:48,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 461080 states and 2033704 transitions. [2021-06-05 13:49:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:49:50,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:50,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:50,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:50,431 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:50,432 INFO L82 PathProgramCache]: Analyzing trace with hash 223413042, now seen corresponding path program 1 times [2021-06-05 13:49:50,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:50,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92858024] [2021-06-05 13:49:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:50,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:50,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92858024] [2021-06-05 13:49:50,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92858024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:50,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526676106] [2021-06-05 13:49:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:49:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:49:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:51,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526676106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:51,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:51,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:49:51,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899275548] [2021-06-05 13:49:51,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:49:51,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:49:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:49:51,044 INFO L87 Difference]: Start difference. First operand 461080 states and 2033704 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:58,459 INFO L93 Difference]: Finished difference Result 461705 states and 2035624 transitions. [2021-06-05 13:49:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:49:58,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:49:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:03,163 INFO L225 Difference]: With dead ends: 461705 [2021-06-05 13:50:03,164 INFO L226 Difference]: Without dead ends: 461265 [2021-06-05 13:50:03,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461265 states. [2021-06-05 13:50:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461265 to 461051. [2021-06-05 13:50:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461051 states, 461050 states have (on average 4.410781910855656) internal successors, (2033591), 461050 states have internal predecessors, (2033591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461051 states to 461051 states and 2033591 transitions. [2021-06-05 13:50:22,870 INFO L78 Accepts]: Start accepts. Automaton has 461051 states and 2033591 transitions. Word has length 33 [2021-06-05 13:50:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:22,870 INFO L482 AbstractCegarLoop]: Abstraction has 461051 states and 2033591 transitions. [2021-06-05 13:50:22,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 461051 states and 2033591 transitions. [2021-06-05 13:50:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:50:24,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:24,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:24,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 13:50:24,313 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 220197682, now seen corresponding path program 2 times [2021-06-05 13:50:24,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:24,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602491768] [2021-06-05 13:50:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:24,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602491768] [2021-06-05 13:50:24,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602491768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898757109] [2021-06-05 13:50:24,584 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 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 [2021-06-05 13:50:24,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:50:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:24,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898757109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:24,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:24,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:50:24,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438793708] [2021-06-05 13:50:24,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:50:24,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:24,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:50:24,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:50:24,821 INFO L87 Difference]: Start difference. First operand 461051 states and 2033591 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:32,616 INFO L93 Difference]: Finished difference Result 466128 states and 2051334 transitions. [2021-06-05 13:50:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:50:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:50:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:35,217 INFO L225 Difference]: With dead ends: 466128 [2021-06-05 13:50:35,217 INFO L226 Difference]: Without dead ends: 465302 [2021-06-05 13:50:35,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465302 states. [2021-06-05 13:50:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465302 to 460987. [2021-06-05 13:50:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460987 states, 460986 states have (on average 4.411233746794913) internal successors, (2033517), 460986 states have internal predecessors, (2033517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460987 states to 460987 states and 2033517 transitions. [2021-06-05 13:50:55,345 INFO L78 Accepts]: Start accepts. Automaton has 460987 states and 2033517 transitions. Word has length 33 [2021-06-05 13:50:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:55,346 INFO L482 AbstractCegarLoop]: Abstraction has 460987 states and 2033517 transitions. [2021-06-05 13:50:55,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 460987 states and 2033517 transitions. [2021-06-05 13:50:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:50:56,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:56,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:57,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:50:57,017 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash -168380372, now seen corresponding path program 3 times [2021-06-05 13:50:57,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:57,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637746256] [2021-06-05 13:50:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:57,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:57,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637746256] [2021-06-05 13:50:57,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637746256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:57,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498995623] [2021-06-05 13:50:57,244 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 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 [2021-06-05 13:50:57,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:50:57,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:57,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:50:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 13:50:57,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:50:57,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:50:57,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:50:57,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 13:50:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:57,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498995623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:57,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:57,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:50:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502439882] [2021-06-05 13:50:57,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:57,413 INFO L87 Difference]: Start difference. First operand 460987 states and 2033517 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 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... [2021-06-05 13:50:58,385 WARN L222 SmtUtils]: Removed 7 from assertion stack [2021-06-05 13:50:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:50:58,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:58,586 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:50:58,588 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:50:58,590 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 13:50:58,590 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:50:58 BasicIcfg [2021-06-05 13:50:58,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:50:58,591 INFO L168 Benchmark]: Toolchain (without parser) took 575172.22 ms. Allocated memory was 383.8 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 363.3 MB in the beginning and 7.4 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.6 GB. Max. memory is 16.0 GB. [2021-06-05 13:50:58,591 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 383.8 MB. Free memory is still 364.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:50:58,591 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.35 ms. Allocated memory is still 383.8 MB. Free memory was 363.3 MB in the beginning and 361.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:50:58,591 INFO L168 Benchmark]: Boogie Preprocessor took 14.33 ms. Allocated memory is still 383.8 MB. Free memory was 361.8 MB in the beginning and 360.8 MB in the end (delta: 987.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:50:58,591 INFO L168 Benchmark]: RCFGBuilder took 277.54 ms. Allocated memory is still 383.8 MB. Free memory was 360.7 MB in the beginning and 348.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 13:50:58,591 INFO L168 Benchmark]: TraceAbstraction took 574852.48 ms. Allocated memory was 383.8 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 347.7 MB in the beginning and 7.4 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.6 GB. Max. memory is 16.0 GB. [2021-06-05 13:50:58,591 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 0.12 ms. Allocated memory is still 383.8 MB. Free memory is still 364.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.35 ms. Allocated memory is still 383.8 MB. Free memory was 363.3 MB in the beginning and 361.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.33 ms. Allocated memory is still 383.8 MB. Free memory was 361.8 MB in the beginning and 360.8 MB in the end (delta: 987.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 277.54 ms. Allocated memory is still 383.8 MB. Free memory was 360.7 MB in the beginning and 348.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 574852.48 ms. Allocated memory was 383.8 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 347.7 MB in the beginning and 7.4 GB in the end (delta: -7.0 GB). Peak memory consumption was 8.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (460987states) and FLOYD_HOARE automaton (currently 7 states, 15 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 7ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (460987states) and FLOYD_HOARE automaton (currently 7 states, 15 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 7ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (460987states) and FLOYD_HOARE automaton (currently 7 states, 15 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 7ms.. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (460987states) and FLOYD_HOARE automaton (currently 7 states, 15 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 574730.7ms, OverallIterations: 86, TraceHistogramMax: 2, EmptinessCheckTime: 17843.5ms, AutomataDifference: 213213.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5982 SDtfs, 23755 SDslu, 37707 SDs, 0 SdLazy, 60836 SolverSat, 2057 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26708.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3829 GetRequests, 1791 SyntacticMatches, 33 SemanticMatches, 2004 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24896 ImplicationChecksByTransitivity, 38066.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=467183occurred in iteration=82, InterpolantAutomatonStates: 1714, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 305455.8ms AutomataMinimizationTime, 85 MinimizatonAttempts, 1441902 StatesRemovedByMinimization, 84 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 332.4ms SsaConstructionTime, 1137.3ms SatisfiabilityAnalysisTime, 17757.2ms InterpolantComputationTime, 4533 NumberOfCodeBlocks, 4521 NumberOfCodeBlocksAsserted, 256 NumberOfCheckSat, 4368 ConstructedInterpolants, 0 QuantifiedInterpolants, 49308 SizeOfPredicates, 449 NumberOfNonLiveVariables, 5871 ConjunctsInSsa, 964 ConjunctsInUnsatCore, 165 InterpolantComputations, 9 PerfectInterpolantSequences, 456/1323 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 !SESSION 2021-06-05 13:41:21.637 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-06-05 13:50:58.863 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e032a16/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e032a16/.metadata/.log.