/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:03:31,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:03:31,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:03:31,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:03:31,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 23:03:31,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:03:31,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:03:31,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:03:31,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:03:31,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:03:31,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:03:31,394 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:03:31,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:03:31,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:03:31,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:03:31,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:03:31,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:03:31,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:03:31,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:03:31,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:03:31,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:03:31,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:03:31,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:03:31,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:03:31,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:03:31,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:03:31,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:03:31,659 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:03:31,660 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:03:31,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-03-10 23:03:31,661 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-03-10 23:03:31,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:03:31,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:03:31,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:03:31,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:03:31,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:03:31,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:03:31,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:03:31,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:03:31,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:03:31,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/1) ... [2021-03-10 23:03:31,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:03:31,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:03:31,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:03:31,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:03:31,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (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 [2021-03-10 23:03:31,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:03:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:03:31,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:03:31,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:03:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:03:31,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:03:31,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:03:31,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:03:31,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:03:31,765 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:03:31,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:03:31,910 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:03:31,911 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:03:31 BoogieIcfgContainer [2021-03-10 23:03:31,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:03:31,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:03:31,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:03:31,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:03:31,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:03:31" (1/2) ... [2021-03-10 23:03:31,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63344aeb and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:03:31, skipping insertion in model container [2021-03-10 23:03:31,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:03:31" (2/2) ... [2021-03-10 23:03:31,940 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-03-10 23:03:31,944 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:03:31,944 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:03:31,947 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:03:31,947 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:03:31,989 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 23:03:32,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 23:03:32,026 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:03:32,026 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:03:32,026 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:03:32,027 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:03:32,027 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:03:32,027 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:03:32,027 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:03:32,027 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:03:32,038 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-03-10 23:03:32,053 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:03:32,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:32,061 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:32,062 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1737383228, now seen corresponding path program 1 times [2021-03-10 23:03:32,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:32,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963769258] [2021-03-10 23:03:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:32,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963769258] [2021-03-10 23:03:32,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:03:32,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:03:32,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243050913] [2021-03-10 23:03:32,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:03:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:03:32,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:03:32,197 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-03-10 23:03:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:32,227 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-03-10 23:03:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:03:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2021-03-10 23:03:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:32,239 INFO L225 Difference]: With dead ends: 84 [2021-03-10 23:03:32,239 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 23:03:32,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:03:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 23:03:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-03-10 23:03:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-03-10 23:03:32,278 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-03-10 23:03:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:32,278 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-03-10 23:03:32,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-03-10 23:03:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-03-10 23:03:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:03:32,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:32,280 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:32,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:03:32,281 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:32,284 INFO L82 PathProgramCache]: Analyzing trace with hash -425397927, now seen corresponding path program 1 times [2021-03-10 23:03:32,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:32,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925352879] [2021-03-10 23:03:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925352879] [2021-03-10 23:03:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132252567] [2021-03-10 23:03:32,470 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 [2021-03-10 23:03:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:03:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:32,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:32,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-03-10 23:03:32,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603419067] [2021-03-10 23:03:32,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:03:32,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:32,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:03:32,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:03:32,726 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-03-10 23:03:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:32,909 INFO L93 Difference]: Finished difference Result 167 states and 303 transitions. [2021-03-10 23:03:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:03:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 19 [2021-03-10 23:03:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:32,910 INFO L225 Difference]: With dead ends: 167 [2021-03-10 23:03:32,911 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 23:03:32,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 23:03:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2021-03-10 23:03:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.956043956043956) internal successors, (178), 91 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 178 transitions. [2021-03-10 23:03:32,929 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 178 transitions. Word has length 19 [2021-03-10 23:03:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:32,930 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 178 transitions. [2021-03-10 23:03:32,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-03-10 23:03:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2021-03-10 23:03:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:03:32,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:32,931 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:33,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 23:03:33,158 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:33,159 INFO L82 PathProgramCache]: Analyzing trace with hash 424057207, now seen corresponding path program 2 times [2021-03-10 23:03:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:33,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736319501] [2021-03-10 23:03:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:33,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736319501] [2021-03-10 23:03:33,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484967268] [2021-03-10 23:03:33,261 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:03:33,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:33,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:03:33,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:33,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:33,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 23:03:33,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230377867] [2021-03-10 23:03:33,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:03:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:03:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:03:33,392 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-03-10 23:03:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:33,587 INFO L93 Difference]: Finished difference Result 167 states and 305 transitions. [2021-03-10 23:03:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:03:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 19 [2021-03-10 23:03:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:33,590 INFO L225 Difference]: With dead ends: 167 [2021-03-10 23:03:33,594 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 23:03:33,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:03:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 23:03:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2021-03-10 23:03:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 183 transitions. [2021-03-10 23:03:33,605 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 183 transitions. Word has length 19 [2021-03-10 23:03:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:33,605 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 183 transitions. [2021-03-10 23:03:33,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-03-10 23:03:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 183 transitions. [2021-03-10 23:03:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:03:33,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:33,606 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:33,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:33,819 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:33,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1628191443, now seen corresponding path program 3 times [2021-03-10 23:03:33,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:33,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354923050] [2021-03-10 23:03:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:33,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354923050] [2021-03-10 23:03:33,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327610538] [2021-03-10 23:03:33,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:33,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:03:33,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:03:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:34,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:34,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 23:03:34,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973707531] [2021-03-10 23:03:34,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:03:34,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:03:34,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:03:34,097 INFO L87 Difference]: Start difference. First operand 95 states and 183 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-03-10 23:03:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:34,314 INFO L93 Difference]: Finished difference Result 141 states and 262 transitions. [2021-03-10 23:03:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:03:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 19 [2021-03-10 23:03:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:34,315 INFO L225 Difference]: With dead ends: 141 [2021-03-10 23:03:34,315 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 23:03:34,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:03:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 23:03:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-03-10 23:03:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 170 transitions. [2021-03-10 23:03:34,325 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 170 transitions. Word has length 19 [2021-03-10 23:03:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:34,325 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 170 transitions. [2021-03-10 23:03:34,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-03-10 23:03:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 170 transitions. [2021-03-10 23:03:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:03:34,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:34,328 INFO L519 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] [2021-03-10 23:03:34,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:34,543 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1114878874, now seen corresponding path program 1 times [2021-03-10 23:03:34,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:34,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979076649] [2021-03-10 23:03:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979076649] [2021-03-10 23:03:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400015599] [2021-03-10 23:03:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 23:03:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:03:34,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:34,651 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 11 treesize of output 7 [2021-03-10 23:03:34,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:34,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:34,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:34,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:03:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:34,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:34,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 23:03:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983160399] [2021-03-10 23:03:34,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:03:34,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:03:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:03:34,670 INFO L87 Difference]: Start difference. First operand 89 states and 170 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:34,716 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-03-10 23:03:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:03:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:03:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:34,717 INFO L225 Difference]: With dead ends: 124 [2021-03-10 23:03:34,717 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 23:03:34,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:03:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 23:03:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2021-03-10 23:03:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9482758620689655) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 226 transitions. [2021-03-10 23:03:34,721 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 226 transitions. Word has length 22 [2021-03-10 23:03:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:34,721 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 226 transitions. [2021-03-10 23:03:34,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 226 transitions. [2021-03-10 23:03:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:34,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:34,722 INFO L519 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] [2021-03-10 23:03:34,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:34,931 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash 543374211, now seen corresponding path program 2 times [2021-03-10 23:03:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:34,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128496736] [2021-03-10 23:03:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:35,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128496736] [2021-03-10 23:03:35,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799989033] [2021-03-10 23:03:35,071 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 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 [2021-03-10 23:03:35,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:35,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:35,204 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 11 treesize of output 7 [2021-03-10 23:03:35,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:35,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:35,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:35,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:35,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:35,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-03-10 23:03:35,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739801693] [2021-03-10 23:03:35,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:03:35,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:03:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:03:35,285 INFO L87 Difference]: Start difference. First operand 117 states and 226 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-03-10 23:03:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:35,712 INFO L93 Difference]: Finished difference Result 213 states and 403 transitions. [2021-03-10 23:03:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:03:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:35,714 INFO L225 Difference]: With dead ends: 213 [2021-03-10 23:03:35,714 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 23:03:35,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:03:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 23:03:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 148. [2021-03-10 23:03:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.9251700680272108) internal successors, (283), 147 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 283 transitions. [2021-03-10 23:03:35,719 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 283 transitions. Word has length 26 [2021-03-10 23:03:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:35,719 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 283 transitions. [2021-03-10 23:03:35,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-03-10 23:03:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 283 transitions. [2021-03-10 23:03:35,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:35,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:35,720 INFO L519 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] [2021-03-10 23:03:35,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-03-10 23:03:35,921 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1138730303, now seen corresponding path program 3 times [2021-03-10 23:03:35,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:35,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570450777] [2021-03-10 23:03:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:36,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570450777] [2021-03-10 23:03:36,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434193806] [2021-03-10 23:03:36,073 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 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 [2021-03-10 23:03:36,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:03:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:36,213 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 11 treesize of output 7 [2021-03-10 23:03:36,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:36,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:36,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:36,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:36,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:36,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 23:03:36,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440477540] [2021-03-10 23:03:36,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:03:36,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:03:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:03:36,300 INFO L87 Difference]: Start difference. First operand 148 states and 283 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:36,797 INFO L93 Difference]: Finished difference Result 249 states and 472 transitions. [2021-03-10 23:03:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:03:36,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:36,798 INFO L225 Difference]: With dead ends: 249 [2021-03-10 23:03:36,798 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 23:03:36,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:03:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 23:03:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2021-03-10 23:03:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.9477124183006536) internal successors, (298), 153 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 298 transitions. [2021-03-10 23:03:36,804 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 298 transitions. Word has length 26 [2021-03-10 23:03:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:36,804 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 298 transitions. [2021-03-10 23:03:36,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 298 transitions. [2021-03-10 23:03:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:36,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:36,805 INFO L519 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] [2021-03-10 23:03:37,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:37,024 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1169241475, now seen corresponding path program 4 times [2021-03-10 23:03:37,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:37,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171189853] [2021-03-10 23:03:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:37,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171189853] [2021-03-10 23:03:37,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081814163] [2021-03-10 23:03:37,154 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 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 [2021-03-10 23:03:37,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:03:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:37,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:37,277 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 11 treesize of output 7 [2021-03-10 23:03:37,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:37,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:37,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:37,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:37,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:37,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 23:03:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788242834] [2021-03-10 23:03:37,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:03:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:03:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:03:37,395 INFO L87 Difference]: Start difference. First operand 154 states and 298 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:37,913 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2021-03-10 23:03:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:03:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:37,914 INFO L225 Difference]: With dead ends: 283 [2021-03-10 23:03:37,914 INFO L226 Difference]: Without dead ends: 274 [2021-03-10 23:03:37,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:03:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-03-10 23:03:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 155. [2021-03-10 23:03:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9545454545454546) internal successors, (301), 154 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 301 transitions. [2021-03-10 23:03:37,924 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 301 transitions. Word has length 26 [2021-03-10 23:03:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:37,925 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 301 transitions. [2021-03-10 23:03:37,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 301 transitions. [2021-03-10 23:03:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:37,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:37,928 INFO L519 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] [2021-03-10 23:03:38,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:38,139 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483455, now seen corresponding path program 5 times [2021-03-10 23:03:38,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:38,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638314056] [2021-03-10 23:03:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638314056] [2021-03-10 23:03:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704254465] [2021-03-10 23:03:38,275 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 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 [2021-03-10 23:03:38,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:38,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:38,385 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 7 [2021-03-10 23:03:38,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:38,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:38,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:38,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-03-10 23:03:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:38,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:38,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 23:03:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942372502] [2021-03-10 23:03:38,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:03:38,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:03:38,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:03:38,521 INFO L87 Difference]: Start difference. First operand 155 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:39,152 INFO L93 Difference]: Finished difference Result 312 states and 596 transitions. [2021-03-10 23:03:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:03:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:39,156 INFO L225 Difference]: With dead ends: 312 [2021-03-10 23:03:39,156 INFO L226 Difference]: Without dead ends: 303 [2021-03-10 23:03:39,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 542.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:03:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-03-10 23:03:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 160. [2021-03-10 23:03:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9811320754716981) internal successors, (315), 159 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 315 transitions. [2021-03-10 23:03:39,162 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 315 transitions. Word has length 26 [2021-03-10 23:03:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:39,162 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 315 transitions. [2021-03-10 23:03:39,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 315 transitions. [2021-03-10 23:03:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:39,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:39,163 INFO L519 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] [2021-03-10 23:03:39,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-03-10 23:03:39,376 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389953, now seen corresponding path program 6 times [2021-03-10 23:03:39,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:39,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597974121] [2021-03-10 23:03:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597974121] [2021-03-10 23:03:39,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:03:39,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:03:39,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203661288] [2021-03-10 23:03:39,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:03:39,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:03:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:03:39,403 INFO L87 Difference]: Start difference. First operand 160 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-03-10 23:03:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:39,412 INFO L93 Difference]: Finished difference Result 319 states and 616 transitions. [2021-03-10 23:03:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:03:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:39,415 INFO L225 Difference]: With dead ends: 319 [2021-03-10 23:03:39,415 INFO L226 Difference]: Without dead ends: 291 [2021-03-10 23:03:39,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:03:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-03-10 23:03:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2021-03-10 23:03:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-03-10 23:03:39,421 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-03-10 23:03:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:39,421 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-03-10 23:03:39,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-03-10 23:03:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-03-10 23:03:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:39,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:39,422 INFO L519 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] [2021-03-10 23:03:39,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 23:03:39,422 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1848637673, now seen corresponding path program 7 times [2021-03-10 23:03:39,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:39,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271165722] [2021-03-10 23:03:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:39,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271165722] [2021-03-10 23:03:39,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30747616] [2021-03-10 23:03:39,556 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 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 [2021-03-10 23:03:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:39,648 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 11 treesize of output 7 [2021-03-10 23:03:39,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:39,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:39,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:39,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-10 23:03:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:39,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:39,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700945808] [2021-03-10 23:03:39,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:39,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:39,795 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:40,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:40,243 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-03-10 23:03:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:03:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:40,244 INFO L225 Difference]: With dead ends: 321 [2021-03-10 23:03:40,245 INFO L226 Difference]: Without dead ends: 293 [2021-03-10 23:03:40,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:03:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-03-10 23:03:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-03-10 23:03:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-03-10 23:03:40,250 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-03-10 23:03:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:40,251 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-03-10 23:03:40,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-03-10 23:03:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:40,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:40,251 INFO L519 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] [2021-03-10 23:03:40,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:40,458 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2081701755, now seen corresponding path program 8 times [2021-03-10 23:03:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:40,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890717302] [2021-03-10 23:03:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:40,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890717302] [2021-03-10 23:03:40,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559185957] [2021-03-10 23:03:40,586 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 [2021-03-10 23:03:40,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:40,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:40,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:40,722 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 7 [2021-03-10 23:03:40,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:40,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:40,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:40,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-03-10 23:03:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:40,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:40,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:40,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214586028] [2021-03-10 23:03:40,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:40,813 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:41,262 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-03-10 23:03:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:03:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:41,265 INFO L225 Difference]: With dead ends: 349 [2021-03-10 23:03:41,265 INFO L226 Difference]: Without dead ends: 317 [2021-03-10 23:03:41,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-10 23:03:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-03-10 23:03:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-03-10 23:03:41,271 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-03-10 23:03:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:41,272 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-03-10 23:03:41,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-03-10 23:03:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:41,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:41,272 INFO L519 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] [2021-03-10 23:03:41,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:41,479 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash 226270023, now seen corresponding path program 9 times [2021-03-10 23:03:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:41,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624187632] [2021-03-10 23:03:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624187632] [2021-03-10 23:03:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531822967] [2021-03-10 23:03:41,601 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 [2021-03-10 23:03:41,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:03:41,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:41,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:41,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:41,718 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 11 treesize of output 7 [2021-03-10 23:03:41,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:41,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:41,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:41,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:41,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:41,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:41,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381365771] [2021-03-10 23:03:41,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:41,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:41,829 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:42,330 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-03-10 23:03:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:03:42,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:42,332 INFO L225 Difference]: With dead ends: 386 [2021-03-10 23:03:42,332 INFO L226 Difference]: Without dead ends: 354 [2021-03-10 23:03:42,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-03-10 23:03:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-03-10 23:03:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-03-10 23:03:42,338 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-03-10 23:03:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:42,338 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-03-10 23:03:42,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-03-10 23:03:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:42,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:42,339 INFO L519 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] [2021-03-10 23:03:42,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 23:03:42,554 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1652512389, now seen corresponding path program 10 times [2021-03-10 23:03:42,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:42,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195619366] [2021-03-10 23:03:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:42,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195619366] [2021-03-10 23:03:42,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564701397] [2021-03-10 23:03:42,697 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 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 [2021-03-10 23:03:42,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:03:42,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:42,809 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 11 treesize of output 7 [2021-03-10 23:03:42,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:42,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:42,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:42,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:42,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:42,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:42,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351546870] [2021-03-10 23:03:42,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:42,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:42,933 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:43,543 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-03-10 23:03:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:03:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:43,545 INFO L225 Difference]: With dead ends: 429 [2021-03-10 23:03:43,545 INFO L226 Difference]: Without dead ends: 397 [2021-03-10 23:03:43,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:03:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-03-10 23:03:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-03-10 23:03:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-03-10 23:03:43,554 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-03-10 23:03:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:43,554 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-03-10 23:03:43,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-03-10 23:03:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:43,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:43,555 INFO L519 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] [2021-03-10 23:03:43,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 23:03:43,771 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:43,772 INFO L82 PathProgramCache]: Analyzing trace with hash 632062879, now seen corresponding path program 11 times [2021-03-10 23:03:43,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:43,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152946775] [2021-03-10 23:03:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:43,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152946775] [2021-03-10 23:03:43,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923695506] [2021-03-10 23:03:43,907 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 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 [2021-03-10 23:03:43,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:43,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:43,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:43,994 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 7 [2021-03-10 23:03:43,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:44,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:44,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:44,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-10 23:03:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:44,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:44,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:44,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166573072] [2021-03-10 23:03:44,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:44,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:44,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:44,132 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:44,597 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-03-10 23:03:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:03:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:03:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:44,599 INFO L225 Difference]: With dead ends: 331 [2021-03-10 23:03:44,599 INFO L226 Difference]: Without dead ends: 303 [2021-03-10 23:03:44,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:03:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-03-10 23:03:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-03-10 23:03:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-03-10 23:03:44,604 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-03-10 23:03:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:44,605 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-03-10 23:03:44,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-03-10 23:03:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:44,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:44,605 INFO L519 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] [2021-03-10 23:03:44,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:03:44,807 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1575102459, now seen corresponding path program 12 times [2021-03-10 23:03:44,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:44,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991796526] [2021-03-10 23:03:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:44,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991796526] [2021-03-10 23:03:44,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757902777] [2021-03-10 23:03:44,939 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 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 [2021-03-10 23:03:44,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:03:44,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:45,065 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 11 treesize of output 7 [2021-03-10 23:03:45,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:45,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:45,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:45,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:45,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:45,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862760970] [2021-03-10 23:03:45,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:45,149 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:45,628 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-03-10 23:03:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:03:45,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:45,629 INFO L225 Difference]: With dead ends: 355 [2021-03-10 23:03:45,629 INFO L226 Difference]: Without dead ends: 323 [2021-03-10 23:03:45,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-03-10 23:03:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-03-10 23:03:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-03-10 23:03:45,635 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-03-10 23:03:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:45,635 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-03-10 23:03:45,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-03-10 23:03:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:45,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:45,636 INFO L519 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] [2021-03-10 23:03:45,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:45,851 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -411893059, now seen corresponding path program 13 times [2021-03-10 23:03:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:45,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738265379] [2021-03-10 23:03:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:45,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738265379] [2021-03-10 23:03:45,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883090426] [2021-03-10 23:03:45,975 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 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 [2021-03-10 23:03:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:45,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:46,085 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 11 treesize of output 7 [2021-03-10 23:03:46,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:46,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:46,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:46,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:46,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:46,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753340577] [2021-03-10 23:03:46,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:46,190 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:46,683 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-03-10 23:03:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:03:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:46,685 INFO L225 Difference]: With dead ends: 392 [2021-03-10 23:03:46,685 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 23:03:46,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 23:03:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-03-10 23:03:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-03-10 23:03:46,691 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-03-10 23:03:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:46,691 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-03-10 23:03:46,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-03-10 23:03:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:46,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:46,692 INFO L519 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] [2021-03-10 23:03:46,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:03:46,907 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1014349307, now seen corresponding path program 14 times [2021-03-10 23:03:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:46,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402612037] [2021-03-10 23:03:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402612037] [2021-03-10 23:03:47,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975114980] [2021-03-10 23:03:47,099 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 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 [2021-03-10 23:03:47,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:47,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:47,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:47,210 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 11 treesize of output 7 [2021-03-10 23:03:47,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:47,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:47,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:47,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-03-10 23:03:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:47,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:47,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:47,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729658328] [2021-03-10 23:03:47,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:47,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:47,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:47,328 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:47,919 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-03-10 23:03:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:03:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:47,927 INFO L225 Difference]: With dead ends: 435 [2021-03-10 23:03:47,927 INFO L226 Difference]: Without dead ends: 403 [2021-03-10 23:03:47,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:03:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-03-10 23:03:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-03-10 23:03:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-03-10 23:03:47,941 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-03-10 23:03:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:47,941 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-03-10 23:03:47,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-03-10 23:03:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:47,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:47,942 INFO L519 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] [2021-03-10 23:03:48,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 23:03:48,158 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash -6100203, now seen corresponding path program 15 times [2021-03-10 23:03:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:48,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559760597] [2021-03-10 23:03:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559760597] [2021-03-10 23:03:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887187899] [2021-03-10 23:03:48,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:48,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:03:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:48,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:48,373 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 11 treesize of output 7 [2021-03-10 23:03:48,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:48,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:48,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:48,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-10 23:03:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:48,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:48,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:48,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059428251] [2021-03-10 23:03:48,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:48,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:48,502 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:48,957 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-03-10 23:03:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:03:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:48,959 INFO L225 Difference]: With dead ends: 337 [2021-03-10 23:03:48,959 INFO L226 Difference]: Without dead ends: 309 [2021-03-10 23:03:48,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:03:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-03-10 23:03:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-03-10 23:03:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-03-10 23:03:48,963 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-03-10 23:03:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:48,963 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-03-10 23:03:48,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-03-10 23:03:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:48,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:48,964 INFO L519 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] [2021-03-10 23:03:49,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:49,177 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 942965637, now seen corresponding path program 16 times [2021-03-10 23:03:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:49,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610827472] [2021-03-10 23:03:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610827472] [2021-03-10 23:03:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181452669] [2021-03-10 23:03:49,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:49,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:03:49,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:49,426 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 7 [2021-03-10 23:03:49,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:49,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:49,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:49,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-10 23:03:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:49,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:49,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364205487] [2021-03-10 23:03:49,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:49,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:49,542 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:49,979 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-03-10 23:03:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:03:49,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:49,980 INFO L225 Difference]: With dead ends: 343 [2021-03-10 23:03:49,980 INFO L226 Difference]: Without dead ends: 311 [2021-03-10 23:03:49,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:03:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-03-10 23:03:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-03-10 23:03:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-03-10 23:03:49,985 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-03-10 23:03:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:49,985 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-03-10 23:03:49,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-03-10 23:03:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:49,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:49,986 INFO L519 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] [2021-03-10 23:03:50,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:50,187 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:50,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1044029881, now seen corresponding path program 17 times [2021-03-10 23:03:50,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:50,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849123278] [2021-03-10 23:03:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849123278] [2021-03-10 23:03:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280697520] [2021-03-10 23:03:50,346 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 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 [2021-03-10 23:03:50,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:03:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:50,444 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 11 treesize of output 7 [2021-03-10 23:03:50,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:50,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:50,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:50,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-10 23:03:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:50,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:50,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:50,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442914374] [2021-03-10 23:03:50,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:50,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:50,575 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:51,048 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-03-10 23:03:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:03:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:51,049 INFO L225 Difference]: With dead ends: 378 [2021-03-10 23:03:51,049 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 23:03:51,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 453.5ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:03:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 23:03:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-03-10 23:03:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-03-10 23:03:51,055 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-03-10 23:03:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:51,055 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-03-10 23:03:51,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-03-10 23:03:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:51,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:51,056 INFO L519 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] [2021-03-10 23:03:51,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:51,267 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash 382212485, now seen corresponding path program 18 times [2021-03-10 23:03:51,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:51,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202781230] [2021-03-10 23:03:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202781230] [2021-03-10 23:03:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53080632] [2021-03-10 23:03:51,388 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 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 [2021-03-10 23:03:51,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 23:03:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:51,498 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 11 treesize of output 7 [2021-03-10 23:03:51,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:51,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:51,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:51,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-10 23:03:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:51,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:51,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:51,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234340476] [2021-03-10 23:03:51,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:51,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:51,619 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:52,222 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-03-10 23:03:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:03:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:52,224 INFO L225 Difference]: With dead ends: 410 [2021-03-10 23:03:52,224 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 23:03:52,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:03:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 23:03:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-03-10 23:03:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-03-10 23:03:52,231 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-03-10 23:03:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:52,232 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-03-10 23:03:52,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-03-10 23:03:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:03:52,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:52,232 INFO L519 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] [2021-03-10 23:03:52,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 23:03:52,447 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash -638237025, now seen corresponding path program 19 times [2021-03-10 23:03:52,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:52,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307945389] [2021-03-10 23:03:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:52,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307945389] [2021-03-10 23:03:52,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134767750] [2021-03-10 23:03:52,564 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 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 [2021-03-10 23:03:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:03:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:52,646 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 11 treesize of output 7 [2021-03-10 23:03:52,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:52,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:52,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:52,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-10 23:03:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:52,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:52,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:03:52,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76841366] [2021-03-10 23:03:52,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:03:52,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:03:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:52,778 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:53,251 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-03-10 23:03:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:03:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-03-10 23:03:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:53,252 INFO L225 Difference]: With dead ends: 307 [2021-03-10 23:03:53,252 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 23:03:53,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 23:03:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-03-10 23:03:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-03-10 23:03:53,256 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-03-10 23:03:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:53,256 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-03-10 23:03:53,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-03-10 23:03:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-03-10 23:03:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:03:53,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:53,257 INFO L519 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] [2021-03-10 23:03:53,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 23:03:53,471 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash 480945784, now seen corresponding path program 20 times [2021-03-10 23:03:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399407046] [2021-03-10 23:03:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399407046] [2021-03-10 23:03:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276892158] [2021-03-10 23:03:53,516 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:03:53,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:53,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:53,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:03:53,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:53,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:03:53,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 23:03:53,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:53,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:53,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:53,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-03-10 23:03:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:53,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:53,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 23:03:53,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068830972] [2021-03-10 23:03:53,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:03:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:03:53,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:03:53,675 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:53,899 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-03-10 23:03:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:03:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 23:03:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:53,900 INFO L225 Difference]: With dead ends: 362 [2021-03-10 23:03:53,900 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 23:03:53,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:03:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 23:03:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-03-10 23:03:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-03-10 23:03:53,904 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-03-10 23:03:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:53,904 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-03-10 23:03:53,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-03-10 23:03:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:03:53,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:53,905 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:54,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:54,106 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1371755552, now seen corresponding path program 21 times [2021-03-10 23:03:54,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:54,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951454169] [2021-03-10 23:03:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:54,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951454169] [2021-03-10 23:03:54,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250486772] [2021-03-10 23:03:54,128 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 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 [2021-03-10 23:03:54,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:03:54,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:03:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:54,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:54,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:03:54,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080947907] [2021-03-10 23:03:54,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:03:54,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:03:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:03:54,193 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-03-10 23:03:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:54,206 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-03-10 23:03:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:03:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 30 [2021-03-10 23:03:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:54,207 INFO L225 Difference]: With dead ends: 534 [2021-03-10 23:03:54,207 INFO L226 Difference]: Without dead ends: 491 [2021-03-10 23:03:54,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:03:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-03-10 23:03:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-03-10 23:03:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-03-10 23:03:54,220 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-03-10 23:03:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:54,220 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-03-10 23:03:54,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-03-10 23:03:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-03-10 23:03:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:03:54,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:54,222 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:54,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:03:54,431 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1245561707, now seen corresponding path program 22 times [2021-03-10 23:03:54,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:54,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312945870] [2021-03-10 23:03:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:54,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312945870] [2021-03-10 23:03:54,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237708931] [2021-03-10 23:03:54,676 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 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 [2021-03-10 23:03:54,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:03:54,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:03:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:54,857 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:03:54,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:03:54,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:54,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:54,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:54,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:03:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:54,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:54,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-03-10 23:03:54,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648115110] [2021-03-10 23:03:54,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:03:54,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:54,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:03:54,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:03:54,971 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:55,676 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-03-10 23:03:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:03:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:03:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:55,678 INFO L225 Difference]: With dead ends: 550 [2021-03-10 23:03:55,678 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 23:03:55,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:03:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 23:03:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-03-10 23:03:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-03-10 23:03:55,684 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-03-10 23:03:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:55,684 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-03-10 23:03:55,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-03-10 23:03:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:03:55,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:55,685 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:55,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:55,895 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash -482243373, now seen corresponding path program 23 times [2021-03-10 23:03:55,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:55,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986004673] [2021-03-10 23:03:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:56,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986004673] [2021-03-10 23:03:56,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460479361] [2021-03-10 23:03:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:56,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:03:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:03:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:56,392 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:03:56,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:03:56,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:56,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:56,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:56,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:03:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:56,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:56,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-03-10 23:03:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594950698] [2021-03-10 23:03:56,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:03:56,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:03:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:03:56,501 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:03:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:57,440 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-03-10 23:03:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:03:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-03-10 23:03:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:57,441 INFO L225 Difference]: With dead ends: 574 [2021-03-10 23:03:57,441 INFO L226 Difference]: Without dead ends: 526 [2021-03-10 23:03:57,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:03:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-10 23:03:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-03-10 23:03:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-03-10 23:03:57,448 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-03-10 23:03:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:57,448 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-03-10 23:03:57,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:03:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-03-10 23:03:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:03:57,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:57,448 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:57,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 23:03:57,663 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:57,663 INFO L82 PathProgramCache]: Analyzing trace with hash 797128341, now seen corresponding path program 24 times [2021-03-10 23:03:57,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:57,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452728617] [2021-03-10 23:03:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:57,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452728617] [2021-03-10 23:03:57,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024734402] [2021-03-10 23:03:57,910 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 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 [2021-03-10 23:03:57,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:03:57,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:03:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:58,130 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:03:58,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:03:58,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:58,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:58,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:58,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:03:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:58,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:58,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-03-10 23:03:58,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362916848] [2021-03-10 23:03:58,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:03:58,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:03:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:03:58,238 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:03:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:59,287 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-03-10 23:03:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:03:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-03-10 23:03:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:59,289 INFO L225 Difference]: With dead ends: 599 [2021-03-10 23:03:59,289 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 23:03:59,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:03:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 23:03:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-03-10 23:03:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-03-10 23:03:59,295 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-03-10 23:03:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:59,295 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-03-10 23:03:59,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:03:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-03-10 23:03:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:03:59,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:59,296 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:59,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:59,512 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2112216365, now seen corresponding path program 25 times [2021-03-10 23:03:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:59,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283102379] [2021-03-10 23:03:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:59,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283102379] [2021-03-10 23:03:59,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358297649] [2021-03-10 23:03:59,758 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 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 [2021-03-10 23:03:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:03:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:59,976 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:03:59,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:03:59,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:03:59,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:03:59,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:03:59,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:04:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:00,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:00,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-03-10 23:04:00,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462835540] [2021-03-10 23:04:00,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:04:00,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:00,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:04:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:04:00,088 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:04:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:01,137 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-03-10 23:04:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:04:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-03-10 23:04:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:01,139 INFO L225 Difference]: With dead ends: 637 [2021-03-10 23:04:01,139 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 23:04:01,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 930.2ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:04:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 23:04:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-03-10 23:04:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-03-10 23:04:01,145 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-03-10 23:04:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:01,145 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-03-10 23:04:01,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:04:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-03-10 23:04:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:01,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:01,146 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:01,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 23:04:01,359 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1541640341, now seen corresponding path program 26 times [2021-03-10 23:04:01,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:01,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420874607] [2021-03-10 23:04:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:01,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420874607] [2021-03-10 23:04:01,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7283617] [2021-03-10 23:04:01,587 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 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 [2021-03-10 23:04:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:04:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:01,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:01,777 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:04:01,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:04:01,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:01,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:01,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:01,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:04:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:01,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:01,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-03-10 23:04:01,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36945118] [2021-03-10 23:04:01,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:04:01,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:04:01,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:04:01,912 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:04:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:03,185 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-03-10 23:04:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:04:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-03-10 23:04:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:03,187 INFO L225 Difference]: With dead ends: 678 [2021-03-10 23:04:03,187 INFO L226 Difference]: Without dead ends: 646 [2021-03-10 23:04:03,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:04:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-03-10 23:04:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-03-10 23:04:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-03-10 23:04:03,194 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-03-10 23:04:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:03,194 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-03-10 23:04:03,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:04:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-03-10 23:04:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:03,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:03,195 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:03,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:03,410 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:03,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1327084589, now seen corresponding path program 27 times [2021-03-10 23:04:03,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:03,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807512643] [2021-03-10 23:04:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:03,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807512643] [2021-03-10 23:04:03,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319005256] [2021-03-10 23:04:03,656 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 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 [2021-03-10 23:04:03,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:04:03,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:03,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:03,844 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:04:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:04:03,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:03,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:03,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:03,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:04:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:03,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:03,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-03-10 23:04:03,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246893644] [2021-03-10 23:04:03,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:04:03,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:04:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:04:03,983 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:04:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:05,695 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-03-10 23:04:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:04:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-03-10 23:04:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:05,697 INFO L225 Difference]: With dead ends: 758 [2021-03-10 23:04:05,697 INFO L226 Difference]: Without dead ends: 714 [2021-03-10 23:04:05,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1300.8ms TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:04:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-03-10 23:04:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-03-10 23:04:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-03-10 23:04:05,708 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-03-10 23:04:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:05,708 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-03-10 23:04:05,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-10 23:04:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-03-10 23:04:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:05,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:05,709 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:05,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:04:05,925 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -293375473, now seen corresponding path program 28 times [2021-03-10 23:04:05,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:05,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381894078] [2021-03-10 23:04:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:06,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381894078] [2021-03-10 23:04:06,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437633209] [2021-03-10 23:04:06,181 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 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 [2021-03-10 23:04:06,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:04:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:06,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:06,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:06,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:06,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:06,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:06,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:06,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:04:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:06,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:06,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630980181] [2021-03-10 23:04:06,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:06,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:06,572 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:07,495 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-03-10 23:04:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:04:07,496 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:07,497 INFO L225 Difference]: With dead ends: 566 [2021-03-10 23:04:07,497 INFO L226 Difference]: Without dead ends: 538 [2021-03-10 23:04:07,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 900.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:04:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-10 23:04:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-03-10 23:04:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-03-10 23:04:07,504 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-03-10 23:04:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:07,504 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-03-10 23:04:07,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-03-10 23:04:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:07,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:07,505 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:07,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:07,720 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:07,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1738305687, now seen corresponding path program 29 times [2021-03-10 23:04:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:07,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305969174] [2021-03-10 23:04:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:07,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305969174] [2021-03-10 23:04:07,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410155410] [2021-03-10 23:04:07,967 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:04:07,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:04:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:04:07,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:08,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:08,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:04:08,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:08,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:08,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:08,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-03-10 23:04:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:08,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:08,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:08,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726906742] [2021-03-10 23:04:08,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:08,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:08,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:08,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:08,402 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:09,349 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-03-10 23:04:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:04:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:09,351 INFO L225 Difference]: With dead ends: 581 [2021-03-10 23:04:09,351 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 23:04:09,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 877.5ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:04:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 23:04:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-03-10 23:04:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-03-10 23:04:09,361 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-03-10 23:04:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:09,361 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-03-10 23:04:09,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-03-10 23:04:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:09,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:09,362 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:09,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 23:04:09,575 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1277289895, now seen corresponding path program 30 times [2021-03-10 23:04:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:09,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630855262] [2021-03-10 23:04:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:09,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630855262] [2021-03-10 23:04:09,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013792531] [2021-03-10 23:04:09,809 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 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 [2021-03-10 23:04:09,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:04:09,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:10,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:10,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:10,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:10,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:10,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:10,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:10,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:10,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703879385] [2021-03-10 23:04:10,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:10,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:10,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:10,246 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:11,316 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-03-10 23:04:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:04:11,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:11,318 INFO L225 Difference]: With dead ends: 618 [2021-03-10 23:04:11,318 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 23:04:11,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 912.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:04:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 23:04:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-03-10 23:04:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-03-10 23:04:11,325 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-03-10 23:04:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:11,325 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-03-10 23:04:11,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-03-10 23:04:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:11,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:11,326 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:11,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:04:11,541 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash 108332695, now seen corresponding path program 31 times [2021-03-10 23:04:11,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:11,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868392538] [2021-03-10 23:04:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:11,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868392538] [2021-03-10 23:04:11,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484101096] [2021-03-10 23:04:11,787 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 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 [2021-03-10 23:04:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:11,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:12,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:12,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:12,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:12,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:12,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:12,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:12,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:12,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:12,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:12,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:12,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532185186] [2021-03-10 23:04:12,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:12,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:12,201 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:13,254 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-03-10 23:04:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:04:13,254 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:13,256 INFO L225 Difference]: With dead ends: 656 [2021-03-10 23:04:13,256 INFO L226 Difference]: Without dead ends: 608 [2021-03-10 23:04:13,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 956.3ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:04:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-03-10 23:04:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-03-10 23:04:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-03-10 23:04:13,262 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-03-10 23:04:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:13,262 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-03-10 23:04:13,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-03-10 23:04:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:13,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:13,263 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:13,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 23:04:13,472 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash -532777895, now seen corresponding path program 32 times [2021-03-10 23:04:13,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:13,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023324481] [2021-03-10 23:04:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023324481] [2021-03-10 23:04:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812941325] [2021-03-10 23:04:13,729 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 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 [2021-03-10 23:04:13,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:04:13,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:13,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:13,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:13,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:13,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:13,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:14,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:14,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:14,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:14,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:14,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966912797] [2021-03-10 23:04:14,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:14,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:14,135 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:15,372 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-03-10 23:04:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:04:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:15,374 INFO L225 Difference]: With dead ends: 689 [2021-03-10 23:04:15,374 INFO L226 Difference]: Without dead ends: 657 [2021-03-10 23:04:15,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1054.3ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:04:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-03-10 23:04:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-03-10 23:04:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-03-10 23:04:15,380 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-03-10 23:04:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:15,381 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-03-10 23:04:15,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-03-10 23:04:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:15,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:15,381 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:15,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:04:15,597 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash 893464471, now seen corresponding path program 33 times [2021-03-10 23:04:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:15,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654047535] [2021-03-10 23:04:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:15,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654047535] [2021-03-10 23:04:15,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888844538] [2021-03-10 23:04:15,846 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 [2021-03-10 23:04:15,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:04:15,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:16,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:16,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:16,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:16,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:16,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:16,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187836561] [2021-03-10 23:04:16,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:16,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:16,273 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:17,786 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-03-10 23:04:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:04:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:17,788 INFO L225 Difference]: With dead ends: 757 [2021-03-10 23:04:17,788 INFO L226 Difference]: Without dead ends: 713 [2021-03-10 23:04:17,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:04:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-03-10 23:04:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-03-10 23:04:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-03-10 23:04:17,795 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-03-10 23:04:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:17,795 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-03-10 23:04:17,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-03-10 23:04:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:17,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:17,796 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:17,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:18,000 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash 255748759, now seen corresponding path program 34 times [2021-03-10 23:04:18,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:18,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354547900] [2021-03-10 23:04:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:18,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354547900] [2021-03-10 23:04:18,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577314958] [2021-03-10 23:04:18,238 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 [2021-03-10 23:04:18,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:04:18,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:18,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:18,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:18,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:18,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:18,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:18,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:18,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:04:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:18,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:18,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695804745] [2021-03-10 23:04:18,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:18,640 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:19,592 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-03-10 23:04:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:04:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:19,594 INFO L225 Difference]: With dead ends: 579 [2021-03-10 23:04:19,595 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 23:04:19,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 897.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:04:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 23:04:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-03-10 23:04:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-03-10 23:04:19,609 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-03-10 23:04:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:19,609 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-03-10 23:04:19,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-03-10 23:04:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:19,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:19,610 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:19,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-10 23:04:19,815 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1562594731, now seen corresponding path program 35 times [2021-03-10 23:04:19,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:19,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004325492] [2021-03-10 23:04:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:20,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004325492] [2021-03-10 23:04:20,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139245535] [2021-03-10 23:04:20,065 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 [2021-03-10 23:04:20,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:04:20,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:20,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:04:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:20,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:20,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:20,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:04:20,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:20,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:20,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:20,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-03-10 23:04:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:20,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:20,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:20,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998087238] [2021-03-10 23:04:20,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:20,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:20,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:20,481 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:21,301 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-03-10 23:04:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:04:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:21,303 INFO L225 Difference]: With dead ends: 557 [2021-03-10 23:04:21,303 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 23:04:21,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 886.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:04:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 23:04:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-03-10 23:04:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-03-10 23:04:21,311 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-03-10 23:04:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:21,311 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-03-10 23:04:21,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-03-10 23:04:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:21,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:21,312 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:21,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 23:04:21,523 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash -176972141, now seen corresponding path program 36 times [2021-03-10 23:04:21,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:21,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705843088] [2021-03-10 23:04:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:21,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705843088] [2021-03-10 23:04:21,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984828800] [2021-03-10 23:04:21,761 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 [2021-03-10 23:04:21,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:04:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:04:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:22,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:22,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:22,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:22,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:22,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:22,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:22,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:22,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055464470] [2021-03-10 23:04:22,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:22,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:22,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:22,180 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:23,218 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-03-10 23:04:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:04:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:23,220 INFO L225 Difference]: With dead ends: 562 [2021-03-10 23:04:23,220 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 23:04:23,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 928.3ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:04:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 23:04:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-03-10 23:04:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-03-10 23:04:23,233 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-03-10 23:04:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:23,233 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-03-10 23:04:23,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-03-10 23:04:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:23,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:23,234 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:23,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:23,439 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:23,439 INFO L82 PathProgramCache]: Analyzing trace with hash -818082731, now seen corresponding path program 37 times [2021-03-10 23:04:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:23,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357643489] [2021-03-10 23:04:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:23,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357643489] [2021-03-10 23:04:23,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058535330] [2021-03-10 23:04:23,694 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 [2021-03-10 23:04:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:23,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:23,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:23,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:23,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:23,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:23,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:23,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:24,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:24,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:24,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475478888] [2021-03-10 23:04:24,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:24,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:24,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:24,063 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:25,080 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-03-10 23:04:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:04:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:25,082 INFO L225 Difference]: With dead ends: 596 [2021-03-10 23:04:25,082 INFO L226 Difference]: Without dead ends: 564 [2021-03-10 23:04:25,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 993.8ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:04:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-03-10 23:04:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-03-10 23:04:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-03-10 23:04:25,087 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-03-10 23:04:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:25,087 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-03-10 23:04:25,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-03-10 23:04:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:25,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:25,088 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:25,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 23:04:25,299 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash 608159635, now seen corresponding path program 38 times [2021-03-10 23:04:25,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:25,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206277082] [2021-03-10 23:04:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206277082] [2021-03-10 23:04:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065629999] [2021-03-10 23:04:25,543 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 [2021-03-10 23:04:25,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:04:25,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:25,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:25,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:25,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:25,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:25,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:25,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:25,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:25,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:25,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:25,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60242438] [2021-03-10 23:04:25,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:25,912 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:27,542 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-03-10 23:04:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:04:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:27,544 INFO L225 Difference]: With dead ends: 658 [2021-03-10 23:04:27,544 INFO L226 Difference]: Without dead ends: 610 [2021-03-10 23:04:27,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1266.9ms TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:04:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-03-10 23:04:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-03-10 23:04:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-03-10 23:04:27,550 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-03-10 23:04:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:27,550 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-03-10 23:04:27,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-03-10 23:04:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:27,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:27,551 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:27,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:27,763 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash -306473111, now seen corresponding path program 39 times [2021-03-10 23:04:27,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:27,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542272128] [2021-03-10 23:04:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:28,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542272128] [2021-03-10 23:04:28,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629186953] [2021-03-10 23:04:28,035 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 [2021-03-10 23:04:28,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:04:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:28,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:28,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:28,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:28,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:28,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:04:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:28,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:28,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322303136] [2021-03-10 23:04:28,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:28,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:28,405 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:29,462 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-03-10 23:04:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:04:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:29,463 INFO L225 Difference]: With dead ends: 556 [2021-03-10 23:04:29,464 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 23:04:29,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1041.6ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:04:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 23:04:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-03-10 23:04:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-03-10 23:04:29,469 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-03-10 23:04:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:29,469 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-03-10 23:04:29,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-03-10 23:04:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:29,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:29,470 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:29,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 23:04:29,685 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1502778699, now seen corresponding path program 40 times [2021-03-10 23:04:29,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:29,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348516065] [2021-03-10 23:04:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:29,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348516065] [2021-03-10 23:04:29,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400586982] [2021-03-10 23:04:29,929 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 [2021-03-10 23:04:29,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:04:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:29,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:30,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:30,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:30,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:30,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:30,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:30,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:30,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:30,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112942553] [2021-03-10 23:04:30,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:30,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:30,340 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:31,364 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-03-10 23:04:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:04:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:31,366 INFO L225 Difference]: With dead ends: 607 [2021-03-10 23:04:31,366 INFO L226 Difference]: Without dead ends: 559 [2021-03-10 23:04:31,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 885.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:04:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-10 23:04:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-03-10 23:04:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-03-10 23:04:31,372 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-03-10 23:04:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:31,372 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-03-10 23:04:31,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-03-10 23:04:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:31,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:31,373 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:31,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:31,573 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1512816883, now seen corresponding path program 41 times [2021-03-10 23:04:31,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:31,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317812539] [2021-03-10 23:04:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:31,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317812539] [2021-03-10 23:04:31,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563801931] [2021-03-10 23:04:31,839 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:04:31,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:04:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:32,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:32,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:32,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:04:32,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:32,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:32,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:32,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-03-10 23:04:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:32,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:32,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-03-10 23:04:32,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829240422] [2021-03-10 23:04:32,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:04:32,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:04:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:04:32,340 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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) [2021-03-10 23:04:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:33,486 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-03-10 23:04:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:04:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 33 [2021-03-10 23:04:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:33,489 INFO L225 Difference]: With dead ends: 644 [2021-03-10 23:04:33,489 INFO L226 Difference]: Without dead ends: 596 [2021-03-10 23:04:33,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1008.8ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:04:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-03-10 23:04:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-03-10 23:04:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-03-10 23:04:33,494 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-03-10 23:04:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:33,495 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-03-10 23:04:33,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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) [2021-03-10 23:04:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-03-10 23:04:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:33,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:33,495 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:33,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 23:04:33,696 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash -127194293, now seen corresponding path program 42 times [2021-03-10 23:04:33,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:33,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116403324] [2021-03-10 23:04:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:33,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116403324] [2021-03-10 23:04:33,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464648506] [2021-03-10 23:04:33,933 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 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 [2021-03-10 23:04:33,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:04:33,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:33,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:34,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:34,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:34,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:34,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:34,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:34,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:34,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:34,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:34,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874917837] [2021-03-10 23:04:34,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:34,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:34,354 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:35,601 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-03-10 23:04:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:04:35,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:35,603 INFO L225 Difference]: With dead ends: 682 [2021-03-10 23:04:35,603 INFO L226 Difference]: Without dead ends: 634 [2021-03-10 23:04:35,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 999.1ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:04:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-03-10 23:04:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-03-10 23:04:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-03-10 23:04:35,609 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-03-10 23:04:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:35,609 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-03-10 23:04:35,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-03-10 23:04:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:35,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:35,610 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:35,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:04:35,810 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash -768304883, now seen corresponding path program 43 times [2021-03-10 23:04:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:35,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981176040] [2021-03-10 23:04:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981176040] [2021-03-10 23:04:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46723673] [2021-03-10 23:04:36,046 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 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 [2021-03-10 23:04:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:36,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:36,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:36,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:36,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:36,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:36,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:36,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:36,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735377916] [2021-03-10 23:04:36,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:36,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:36,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:36,444 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:37,742 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-03-10 23:04:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:04:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:37,745 INFO L225 Difference]: With dead ends: 715 [2021-03-10 23:04:37,745 INFO L226 Difference]: Without dead ends: 683 [2021-03-10 23:04:37,745 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:04:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-03-10 23:04:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-03-10 23:04:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-03-10 23:04:37,751 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-03-10 23:04:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:37,751 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-03-10 23:04:37,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-03-10 23:04:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:37,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:37,752 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:37,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:37,968 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash 657937483, now seen corresponding path program 44 times [2021-03-10 23:04:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:37,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159987367] [2021-03-10 23:04:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:38,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159987367] [2021-03-10 23:04:38,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42555018] [2021-03-10 23:04:38,235 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 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 [2021-03-10 23:04:38,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:04:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:38,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:38,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:38,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:38,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:38,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:38,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:38,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:38,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162544178] [2021-03-10 23:04:38,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:38,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:38,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:38,633 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:40,352 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-03-10 23:04:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:04:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:40,355 INFO L225 Difference]: With dead ends: 783 [2021-03-10 23:04:40,355 INFO L226 Difference]: Without dead ends: 739 [2021-03-10 23:04:40,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1271.5ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:04:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-03-10 23:04:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-03-10 23:04:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-03-10 23:04:40,361 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-03-10 23:04:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:40,362 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-03-10 23:04:40,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-03-10 23:04:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:40,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:40,362 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:40,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 23:04:40,567 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash 20221771, now seen corresponding path program 45 times [2021-03-10 23:04:40,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:40,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56558488] [2021-03-10 23:04:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56558488] [2021-03-10 23:04:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296420284] [2021-03-10 23:04:40,810 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 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 [2021-03-10 23:04:40,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:04:40,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:40,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:41,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:41,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:41,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:41,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:41,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:41,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:04:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:41,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:41,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554511262] [2021-03-10 23:04:41,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:41,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:41,214 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:42,322 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-03-10 23:04:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:04:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:42,324 INFO L225 Difference]: With dead ends: 605 [2021-03-10 23:04:42,324 INFO L226 Difference]: Without dead ends: 577 [2021-03-10 23:04:42,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 945.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:04:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-03-10 23:04:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-03-10 23:04:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-03-10 23:04:42,334 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-03-10 23:04:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:42,334 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-03-10 23:04:42,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-03-10 23:04:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:42,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:42,335 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:42,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:42,535 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:42,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1798121719, now seen corresponding path program 46 times [2021-03-10 23:04:42,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:42,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096860347] [2021-03-10 23:04:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:42,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096860347] [2021-03-10 23:04:42,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141593001] [2021-03-10 23:04:42,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:04:42,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:04:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:43,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:43,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:43,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:43,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:43,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:43,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:43,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:43,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:43,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084441955] [2021-03-10 23:04:43,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:43,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:43,224 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:44,051 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-03-10 23:04:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:04:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:44,053 INFO L225 Difference]: With dead ends: 583 [2021-03-10 23:04:44,053 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 23:04:44,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:04:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 23:04:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-03-10 23:04:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-03-10 23:04:44,058 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-03-10 23:04:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:44,058 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-03-10 23:04:44,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-03-10 23:04:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:44,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:44,059 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:44,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:44,263 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash -412499129, now seen corresponding path program 47 times [2021-03-10 23:04:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596894915] [2021-03-10 23:04:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596894915] [2021-03-10 23:04:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940502646] [2021-03-10 23:04:44,512 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 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 [2021-03-10 23:04:44,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:04:44,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:04:44,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:44,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:44,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:44,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:04:44,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:44,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:44,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:44,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-03-10 23:04:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:44,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:44,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:44,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816200084] [2021-03-10 23:04:44,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:44,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:44,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:44,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:44,930 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:46,550 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-03-10 23:04:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:04:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:46,552 INFO L225 Difference]: With dead ends: 708 [2021-03-10 23:04:46,552 INFO L226 Difference]: Without dead ends: 613 [2021-03-10 23:04:46,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1369.7ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:04:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-03-10 23:04:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-03-10 23:04:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-03-10 23:04:46,561 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-03-10 23:04:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:46,561 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-03-10 23:04:46,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-03-10 23:04:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:46,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:46,562 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:46,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 23:04:46,763 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1053609719, now seen corresponding path program 48 times [2021-03-10 23:04:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:46,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563667717] [2021-03-10 23:04:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:47,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563667717] [2021-03-10 23:04:47,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124232212] [2021-03-10 23:04:47,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:47,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:04:47,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:47,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:47,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:47,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:47,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:47,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:47,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:47,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:47,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:47,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:47,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156798481] [2021-03-10 23:04:47,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:47,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:47,455 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:49,018 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-03-10 23:04:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:04:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:49,020 INFO L225 Difference]: With dead ends: 736 [2021-03-10 23:04:49,020 INFO L226 Difference]: Without dead ends: 668 [2021-03-10 23:04:49,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1419.1ms TimeCoverageRelationStatistics Valid=414, Invalid=3368, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:04:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-03-10 23:04:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-03-10 23:04:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-03-10 23:04:49,026 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-03-10 23:04:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:49,026 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-03-10 23:04:49,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-03-10 23:04:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:49,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:49,027 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:49,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:49,240 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:49,241 INFO L82 PathProgramCache]: Analyzing trace with hash 372632647, now seen corresponding path program 49 times [2021-03-10 23:04:49,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:49,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019084777] [2021-03-10 23:04:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:49,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019084777] [2021-03-10 23:04:49,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439342129] [2021-03-10 23:04:49,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:04:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:49,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:49,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:49,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:49,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:49,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:49,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:49,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:49,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:49,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:49,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120421969] [2021-03-10 23:04:49,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:49,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:49,951 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:52,245 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-03-10 23:04:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:04:52,246 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:52,247 INFO L225 Difference]: With dead ends: 829 [2021-03-10 23:04:52,247 INFO L226 Difference]: Without dead ends: 753 [2021-03-10 23:04:52,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1785.1ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:04:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-03-10 23:04:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-03-10 23:04:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-03-10 23:04:52,254 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-03-10 23:04:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:52,254 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-03-10 23:04:52,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-03-10 23:04:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:52,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:52,254 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:52,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 23:04:52,455 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash -542000099, now seen corresponding path program 50 times [2021-03-10 23:04:52,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:52,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868461492] [2021-03-10 23:04:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:52,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868461492] [2021-03-10 23:04:52,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015803354] [2021-03-10 23:04:52,744 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:04:52,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:04:52,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:52,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:52,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:52,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:52,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:52,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:52,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:52,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:04:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:53,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:53,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:53,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789414751] [2021-03-10 23:04:53,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:53,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:53,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:53,186 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:54,740 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-03-10 23:04:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:04:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:54,741 INFO L225 Difference]: With dead ends: 652 [2021-03-10 23:04:54,741 INFO L226 Difference]: Without dead ends: 596 [2021-03-10 23:04:54,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1436.3ms TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:04:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-03-10 23:04:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-03-10 23:04:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-03-10 23:04:54,747 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-03-10 23:04:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:54,747 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-03-10 23:04:54,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-03-10 23:04:54,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:54,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:54,748 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:54,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 23:04:54,949 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2125436613, now seen corresponding path program 51 times [2021-03-10 23:04:54,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:54,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445368927] [2021-03-10 23:04:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:55,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445368927] [2021-03-10 23:04:55,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813838544] [2021-03-10 23:04:55,231 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 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 [2021-03-10 23:04:55,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:04:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:55,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:55,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:55,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:55,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:55,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:55,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:55,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:55,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:55,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648324620] [2021-03-10 23:04:55,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:55,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:55,692 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:56,708 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-03-10 23:04:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:04:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:56,709 INFO L225 Difference]: With dead ends: 637 [2021-03-10 23:04:56,709 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 23:04:56,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:04:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 23:04:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-03-10 23:04:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-03-10 23:04:56,717 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-03-10 23:04:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:56,718 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-03-10 23:04:56,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-03-10 23:04:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:56,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:56,718 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:56,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 23:04:56,919 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash -739814023, now seen corresponding path program 52 times [2021-03-10 23:04:56,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:56,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266745541] [2021-03-10 23:04:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:57,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266745541] [2021-03-10 23:04:57,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489810652] [2021-03-10 23:04:57,223 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 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 [2021-03-10 23:04:57,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:04:57,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:57,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:04:57,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:04:57,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:04:57,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:04:57,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:04:57,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:04:57,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:04:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:57,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:57,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:04:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600102503] [2021-03-10 23:04:57,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:57,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:57,658 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:59,314 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-03-10 23:04:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:04:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:04:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:59,316 INFO L225 Difference]: With dead ends: 764 [2021-03-10 23:04:59,316 INFO L226 Difference]: Without dead ends: 669 [2021-03-10 23:04:59,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1481.6ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:04:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-03-10 23:04:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-03-10 23:04:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-03-10 23:04:59,322 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-03-10 23:04:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:59,322 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-03-10 23:04:59,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:04:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-03-10 23:04:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:04:59,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:59,323 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:59,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 23:04:59,524 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1380924613, now seen corresponding path program 53 times [2021-03-10 23:04:59,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:59,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233195194] [2021-03-10 23:04:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:59,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233195194] [2021-03-10 23:04:59,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362544407] [2021-03-10 23:04:59,829 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 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 [2021-03-10 23:04:59,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:04:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:04:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:00,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:00,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:00,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:00,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:00,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:00,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:00,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:00,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:00,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005436945] [2021-03-10 23:05:00,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:00,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:00,273 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:02,432 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-03-10 23:05:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:05:02,432 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:02,434 INFO L225 Difference]: With dead ends: 788 [2021-03-10 23:05:02,434 INFO L226 Difference]: Without dead ends: 720 [2021-03-10 23:05:02,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1752.8ms TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:05:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-03-10 23:05:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-03-10 23:05:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-03-10 23:05:02,441 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-03-10 23:05:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:02,441 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-03-10 23:05:02,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-03-10 23:05:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:02,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:02,442 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:02,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:02,643 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 45317753, now seen corresponding path program 54 times [2021-03-10 23:05:02,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:02,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889377354] [2021-03-10 23:05:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:03,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889377354] [2021-03-10 23:05:03,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990338224] [2021-03-10 23:05:03,029 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 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 [2021-03-10 23:05:03,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:05:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:05:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:03,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:03,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:03,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:03,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:03,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:03,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:03,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:03,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:03,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:03,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:03,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961585879] [2021-03-10 23:05:03,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:03,435 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:06,195 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-03-10 23:05:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 23:05:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:06,196 INFO L225 Difference]: With dead ends: 888 [2021-03-10 23:05:06,196 INFO L226 Difference]: Without dead ends: 812 [2021-03-10 23:05:06,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2144.6ms TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 23:05:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-10 23:05:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-03-10 23:05:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-03-10 23:05:06,204 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-03-10 23:05:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:06,204 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-03-10 23:05:06,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-03-10 23:05:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:06,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:06,205 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:06,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:06,405 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash -869314993, now seen corresponding path program 55 times [2021-03-10 23:05:06,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:06,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269918103] [2021-03-10 23:05:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:06,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269918103] [2021-03-10 23:05:06,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397364967] [2021-03-10 23:05:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:06,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:06,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:06,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:06,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:06,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:06,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:06,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:06,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:05:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:07,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:07,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:07,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199485355] [2021-03-10 23:05:07,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:07,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:07,088 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:08,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:08,548 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-03-10 23:05:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:05:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:08,550 INFO L225 Difference]: With dead ends: 715 [2021-03-10 23:05:08,550 INFO L226 Difference]: Without dead ends: 659 [2021-03-10 23:05:08,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1395.1ms TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:05:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-10 23:05:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-03-10 23:05:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-03-10 23:05:08,556 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-03-10 23:05:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:08,557 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-03-10 23:05:08,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-03-10 23:05:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:08,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:08,557 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:08,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:08,758 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash -865898715, now seen corresponding path program 56 times [2021-03-10 23:05:08,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:08,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257056933] [2021-03-10 23:05:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:09,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257056933] [2021-03-10 23:05:09,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41940280] [2021-03-10 23:05:09,069 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 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 [2021-03-10 23:05:09,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:05:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:09,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:09,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:09,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:09,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:09,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:09,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:09,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:09,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:09,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002243066] [2021-03-10 23:05:09,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:09,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:09,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:09,491 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:11,478 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-03-10 23:05:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:05:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:11,480 INFO L225 Difference]: With dead ends: 766 [2021-03-10 23:05:11,480 INFO L226 Difference]: Without dead ends: 678 [2021-03-10 23:05:11,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1785.0ms TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:05:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-03-10 23:05:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-03-10 23:05:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-03-10 23:05:11,487 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-03-10 23:05:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:11,487 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-03-10 23:05:11,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-03-10 23:05:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:11,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:11,488 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:11,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 23:05:11,689 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:11,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1507009305, now seen corresponding path program 57 times [2021-03-10 23:05:11,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:11,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450445771] [2021-03-10 23:05:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:12,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450445771] [2021-03-10 23:05:12,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438731225] [2021-03-10 23:05:12,038 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 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 [2021-03-10 23:05:12,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:05:12,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:12,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:12,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:12,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:12,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:12,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:12,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:12,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:12,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:12,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:12,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:12,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721588060] [2021-03-10 23:05:12,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:12,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:12,467 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:14,487 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-03-10 23:05:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:05:14,488 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:14,489 INFO L225 Difference]: With dead ends: 771 [2021-03-10 23:05:14,489 INFO L226 Difference]: Without dead ends: 707 [2021-03-10 23:05:14,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1833.8ms TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:05:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-03-10 23:05:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-03-10 23:05:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-03-10 23:05:14,496 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-03-10 23:05:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:14,496 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-03-10 23:05:14,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-03-10 23:05:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:14,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:14,497 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:14,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:14,711 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash -80766939, now seen corresponding path program 58 times [2021-03-10 23:05:14,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:14,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153606366] [2021-03-10 23:05:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153606366] [2021-03-10 23:05:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662822015] [2021-03-10 23:05:15,010 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 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 [2021-03-10 23:05:15,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:05:15,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:15,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:15,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:15,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:15,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:15,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:15,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:15,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:15,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:15,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488556569] [2021-03-10 23:05:15,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:15,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:15,412 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:17,849 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-03-10 23:05:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:05:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:17,850 INFO L225 Difference]: With dead ends: 823 [2021-03-10 23:05:17,850 INFO L226 Difference]: Without dead ends: 767 [2021-03-10 23:05:17,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1985.9ms TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:05:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-03-10 23:05:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-03-10 23:05:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-03-10 23:05:17,857 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-03-10 23:05:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:17,857 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-03-10 23:05:17,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-03-10 23:05:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:17,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:17,858 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:18,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 23:05:18,063 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -185613557, now seen corresponding path program 59 times [2021-03-10 23:05:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:18,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59244901] [2021-03-10 23:05:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:18,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59244901] [2021-03-10 23:05:18,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481391533] [2021-03-10 23:05:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:05:18,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:05:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:18,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:18,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:18,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:18,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:18,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:18,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:05:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:18,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:18,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-03-10 23:05:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677086178] [2021-03-10 23:05:18,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:05:18,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:05:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:05:18,793 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:20,446 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-03-10 23:05:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:05:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-03-10 23:05:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:20,448 INFO L225 Difference]: With dead ends: 729 [2021-03-10 23:05:20,448 INFO L226 Difference]: Without dead ends: 673 [2021-03-10 23:05:20,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1545.7ms TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:05:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-03-10 23:05:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-03-10 23:05:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-03-10 23:05:20,454 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-03-10 23:05:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:20,454 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-03-10 23:05:20,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-03-10 23:05:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-03-10 23:05:20,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:20,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:20,455 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:20,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:20,655 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:20,656 INFO L82 PathProgramCache]: Analyzing trace with hash -931000177, now seen corresponding path program 60 times [2021-03-10 23:05:20,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:20,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335607192] [2021-03-10 23:05:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:20,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335607192] [2021-03-10 23:05:20,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437084217] [2021-03-10 23:05:20,931 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 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 [2021-03-10 23:05:20,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:05:20,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:20,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:05:20,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:21,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:21,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:05:21,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:21,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:21,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:21,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-03-10 23:05:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:21,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:21,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:21,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224194033] [2021-03-10 23:05:21,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:21,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:21,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:21,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:21,427 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:22,349 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-03-10 23:05:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:05:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:22,351 INFO L225 Difference]: With dead ends: 722 [2021-03-10 23:05:22,351 INFO L226 Difference]: Without dead ends: 674 [2021-03-10 23:05:22,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1022.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:05:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-03-10 23:05:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-03-10 23:05:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-03-10 23:05:22,357 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-03-10 23:05:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:22,357 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-03-10 23:05:22,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-03-10 23:05:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:22,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:22,358 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:22,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 23:05:22,558 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash 348371537, now seen corresponding path program 61 times [2021-03-10 23:05:22,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:22,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563664636] [2021-03-10 23:05:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:22,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563664636] [2021-03-10 23:05:22,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139811141] [2021-03-10 23:05:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:05:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:23,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:23,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:23,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:23,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:23,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:23,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:23,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:23,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:23,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082921489] [2021-03-10 23:05:23,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:23,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:23,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:23,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:23,329 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:24,419 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-03-10 23:05:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:05:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:24,421 INFO L225 Difference]: With dead ends: 759 [2021-03-10 23:05:24,421 INFO L226 Difference]: Without dead ends: 711 [2021-03-10 23:05:24,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:05:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-03-10 23:05:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-03-10 23:05:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-03-10 23:05:24,428 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-03-10 23:05:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:24,428 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-03-10 23:05:24,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-03-10 23:05:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:24,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:24,429 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:24,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:24,629 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1733994127, now seen corresponding path program 62 times [2021-03-10 23:05:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:24,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475712764] [2021-03-10 23:05:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:24,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475712764] [2021-03-10 23:05:24,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097267417] [2021-03-10 23:05:24,893 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 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 [2021-03-10 23:05:24,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:05:24,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:25,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:25,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:25,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:25,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:25,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:25,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:25,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501734543] [2021-03-10 23:05:25,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:25,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:25,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:25,401 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:26,616 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-03-10 23:05:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:05:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:26,618 INFO L225 Difference]: With dead ends: 797 [2021-03-10 23:05:26,618 INFO L226 Difference]: Without dead ends: 749 [2021-03-10 23:05:26,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1127.1ms TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:05:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-03-10 23:05:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-03-10 23:05:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-03-10 23:05:26,624 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-03-10 23:05:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:26,624 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-03-10 23:05:26,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-03-10 23:05:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:26,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:26,625 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:26,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:05:26,826 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:26,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1092883537, now seen corresponding path program 63 times [2021-03-10 23:05:26,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:26,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621057962] [2021-03-10 23:05:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:27,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621057962] [2021-03-10 23:05:27,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98617442] [2021-03-10 23:05:27,111 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 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 [2021-03-10 23:05:27,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:05:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:27,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:27,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:27,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:27,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:27,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:27,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:27,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776835799] [2021-03-10 23:05:27,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:27,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:27,590 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:29,101 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-03-10 23:05:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:05:29,102 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:29,103 INFO L225 Difference]: With dead ends: 830 [2021-03-10 23:05:29,103 INFO L226 Difference]: Without dead ends: 798 [2021-03-10 23:05:29,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1220.6ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:05:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-03-10 23:05:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-03-10 23:05:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-03-10 23:05:29,109 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-03-10 23:05:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:29,109 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-03-10 23:05:29,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-03-10 23:05:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:29,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:29,110 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:29,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-03-10 23:05:29,323 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:29,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1775841393, now seen corresponding path program 64 times [2021-03-10 23:05:29,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:29,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284725761] [2021-03-10 23:05:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:29,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284725761] [2021-03-10 23:05:29,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655881559] [2021-03-10 23:05:29,610 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 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 [2021-03-10 23:05:29,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:05:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:29,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:29,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:29,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:29,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:29,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:29,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:30,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:30,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:30,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316164456] [2021-03-10 23:05:30,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:30,109 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:32,040 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-03-10 23:05:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:05:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:32,042 INFO L225 Difference]: With dead ends: 897 [2021-03-10 23:05:32,042 INFO L226 Difference]: Without dead ends: 853 [2021-03-10 23:05:32,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1467.0ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:05:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-03-10 23:05:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-03-10 23:05:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-03-10 23:05:32,050 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-03-10 23:05:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:32,050 INFO L480 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-03-10 23:05:32,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-03-10 23:05:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:32,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:32,051 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:32,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:32,267 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1881410191, now seen corresponding path program 65 times [2021-03-10 23:05:32,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:32,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170102156] [2021-03-10 23:05:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:32,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170102156] [2021-03-10 23:05:32,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986413347] [2021-03-10 23:05:32,545 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 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 [2021-03-10 23:05:32,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:05:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:32,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:32,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:32,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:32,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:32,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:32,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:05:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:33,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:33,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847749665] [2021-03-10 23:05:33,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:33,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:33,012 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:33,993 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-03-10 23:05:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:05:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:33,995 INFO L225 Difference]: With dead ends: 720 [2021-03-10 23:05:33,995 INFO L226 Difference]: Without dead ends: 692 [2021-03-10 23:05:33,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1066.0ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:05:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-03-10 23:05:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-03-10 23:05:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-03-10 23:05:34,001 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-03-10 23:05:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:34,001 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-03-10 23:05:34,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-03-10 23:05:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:34,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:34,002 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:34,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:34,202 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:34,203 INFO L82 PathProgramCache]: Analyzing trace with hash 63066701, now seen corresponding path program 66 times [2021-03-10 23:05:34,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:34,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113950520] [2021-03-10 23:05:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113950520] [2021-03-10 23:05:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947935767] [2021-03-10 23:05:34,513 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 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 [2021-03-10 23:05:34,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:05:34,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:05:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:34,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:34,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:34,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:34,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:35,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:35,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:35,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430258562] [2021-03-10 23:05:35,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:35,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:35,003 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:36,220 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-03-10 23:05:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:05:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:36,221 INFO L225 Difference]: With dead ends: 760 [2021-03-10 23:05:36,222 INFO L226 Difference]: Without dead ends: 664 [2021-03-10 23:05:36,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1329.5ms TimeCoverageRelationStatistics Valid=277, Invalid=2915, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:05:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-03-10 23:05:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-03-10 23:05:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-03-10 23:05:36,228 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-03-10 23:05:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:36,228 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-03-10 23:05:36,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-03-10 23:05:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:36,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:36,229 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:36,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 23:05:36,429 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1448689291, now seen corresponding path program 67 times [2021-03-10 23:05:36,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:36,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968284723] [2021-03-10 23:05:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:36,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968284723] [2021-03-10 23:05:36,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671366452] [2021-03-10 23:05:36,728 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 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 [2021-03-10 23:05:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:36,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:37,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:37,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:37,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:37,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:37,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:37,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:37,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:37,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:37,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14756420] [2021-03-10 23:05:37,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:37,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:37,194 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:38,955 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-03-10 23:05:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:05:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:38,957 INFO L225 Difference]: With dead ends: 806 [2021-03-10 23:05:38,957 INFO L226 Difference]: Without dead ends: 711 [2021-03-10 23:05:38,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1550.5ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:05:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-03-10 23:05:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-03-10 23:05:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-03-10 23:05:38,963 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-03-10 23:05:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:38,964 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-03-10 23:05:38,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-03-10 23:05:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:38,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:38,964 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:39,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:39,179 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:39,180 INFO L82 PathProgramCache]: Analyzing trace with hash 807578701, now seen corresponding path program 68 times [2021-03-10 23:05:39,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:39,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403931969] [2021-03-10 23:05:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:39,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403931969] [2021-03-10 23:05:39,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512649882] [2021-03-10 23:05:39,456 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 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 [2021-03-10 23:05:39,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:05:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:39,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:39,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:39,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:39,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:39,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:39,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:39,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:39,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:39,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:39,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228650009] [2021-03-10 23:05:39,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:39,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:39,897 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:41,835 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-03-10 23:05:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:05:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:41,837 INFO L225 Difference]: With dead ends: 830 [2021-03-10 23:05:41,837 INFO L226 Difference]: Without dead ends: 762 [2021-03-10 23:05:41,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1537.9ms TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:05:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-03-10 23:05:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-03-10 23:05:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-03-10 23:05:41,844 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-03-10 23:05:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:41,844 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-03-10 23:05:41,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-03-10 23:05:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:41,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:41,845 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:42,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 23:05:42,046 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2061146229, now seen corresponding path program 69 times [2021-03-10 23:05:42,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:42,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060471933] [2021-03-10 23:05:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:42,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060471933] [2021-03-10 23:05:42,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678725444] [2021-03-10 23:05:42,324 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 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 [2021-03-10 23:05:42,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:05:42,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:42,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:42,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:42,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:42,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:42,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:42,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:42,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686015909] [2021-03-10 23:05:42,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:42,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:42,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:42,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:42,776 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:45,122 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-03-10 23:05:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:05:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:45,124 INFO L225 Difference]: With dead ends: 939 [2021-03-10 23:05:45,124 INFO L226 Difference]: Without dead ends: 863 [2021-03-10 23:05:45,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1919.3ms TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:05:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-03-10 23:05:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-03-10 23:05:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-03-10 23:05:45,131 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-03-10 23:05:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:45,131 INFO L480 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-03-10 23:05:45,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-03-10 23:05:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:45,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:45,132 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:45,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:45,341 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1319188321, now seen corresponding path program 70 times [2021-03-10 23:05:45,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:45,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997216110] [2021-03-10 23:05:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:45,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997216110] [2021-03-10 23:05:45,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618216425] [2021-03-10 23:05:45,618 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 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 [2021-03-10 23:05:45,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:05:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:45,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:45,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:45,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:45,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:45,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:45,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:05:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:46,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:46,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:46,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009016962] [2021-03-10 23:05:46,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:46,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:46,092 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:47,617 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-03-10 23:05:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:05:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:47,619 INFO L225 Difference]: With dead ends: 762 [2021-03-10 23:05:47,619 INFO L226 Difference]: Without dead ends: 706 [2021-03-10 23:05:47,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1535.1ms TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:05:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-03-10 23:05:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-03-10 23:05:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-03-10 23:05:47,625 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-03-10 23:05:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:47,625 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-03-10 23:05:47,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-03-10 23:05:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:47,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:47,626 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:47,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 23:05:47,826 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash -264248193, now seen corresponding path program 71 times [2021-03-10 23:05:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:47,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311140209] [2021-03-10 23:05:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:48,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311140209] [2021-03-10 23:05:48,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284447746] [2021-03-10 23:05:48,142 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 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 [2021-03-10 23:05:48,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:05:48,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:48,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:48,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:48,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:48,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:48,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:48,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:48,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:48,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:48,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:48,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360732536] [2021-03-10 23:05:48,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:48,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:48,629 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:50,019 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-03-10 23:05:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:05:50,020 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:50,021 INFO L225 Difference]: With dead ends: 781 [2021-03-10 23:05:50,021 INFO L226 Difference]: Without dead ends: 685 [2021-03-10 23:05:50,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1300.8ms TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:05:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-03-10 23:05:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-03-10 23:05:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-03-10 23:05:50,027 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-03-10 23:05:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:50,027 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-03-10 23:05:50,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-03-10 23:05:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:50,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:50,028 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:50,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:50,229 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1121374397, now seen corresponding path program 72 times [2021-03-10 23:05:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:50,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956594641] [2021-03-10 23:05:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:50,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956594641] [2021-03-10 23:05:50,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417217167] [2021-03-10 23:05:50,512 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 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 [2021-03-10 23:05:50,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:05:50,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:50,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:05:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:50,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:50,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:50,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:50,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:50,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:50,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:50,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:50,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523101854] [2021-03-10 23:05:50,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:50,977 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:53,091 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-03-10 23:05:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:05:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:53,092 INFO L225 Difference]: With dead ends: 862 [2021-03-10 23:05:53,093 INFO L226 Difference]: Without dead ends: 760 [2021-03-10 23:05:53,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1764.0ms TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:05:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-03-10 23:05:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-03-10 23:05:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-03-10 23:05:53,099 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-03-10 23:05:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:53,099 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-03-10 23:05:53,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-03-10 23:05:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:53,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:53,100 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:53,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 23:05:53,301 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:53,301 INFO L82 PathProgramCache]: Analyzing trace with hash 480263807, now seen corresponding path program 73 times [2021-03-10 23:05:53,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:53,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370775052] [2021-03-10 23:05:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:53,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370775052] [2021-03-10 23:05:53,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381972129] [2021-03-10 23:05:53,596 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 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 [2021-03-10 23:05:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:53,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:53,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:53,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:53,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:53,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:54,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:54,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:54,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849927540] [2021-03-10 23:05:54,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:54,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:54,059 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:56,808 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-03-10 23:05:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 23:05:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:05:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:56,810 INFO L225 Difference]: With dead ends: 971 [2021-03-10 23:05:56,810 INFO L226 Difference]: Without dead ends: 884 [2021-03-10 23:05:56,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2245.1ms TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-03-10 23:05:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-03-10 23:05:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-03-10 23:05:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-03-10 23:05:56,817 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-03-10 23:05:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:56,817 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-03-10 23:05:56,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:05:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-03-10 23:05:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:05:56,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:56,818 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:57,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:57,018 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1906506173, now seen corresponding path program 74 times [2021-03-10 23:05:57,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:57,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613451443] [2021-03-10 23:05:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:57,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613451443] [2021-03-10 23:05:57,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231777624] [2021-03-10 23:05:57,347 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 [2021-03-10 23:05:57,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:05:57,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:05:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:57,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:05:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:05:57,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:05:57,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:05:57,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:05:57,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:05:57,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:05:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:57,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:57,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:05:57,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344244403] [2021-03-10 23:05:57,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:05:57,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:05:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:05:57,815 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:01,194 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-03-10 23:06:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 23:06:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:01,196 INFO L225 Difference]: With dead ends: 1084 [2021-03-10 23:06:01,196 INFO L226 Difference]: Without dead ends: 1005 [2021-03-10 23:06:01,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2742.0ms TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 23:06:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-03-10 23:06:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-03-10 23:06:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-03-10 23:06:01,204 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-03-10 23:06:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:01,204 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-03-10 23:06:01,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-03-10 23:06:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:01,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:01,205 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:01,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:01,406 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 991873427, now seen corresponding path program 75 times [2021-03-10 23:06:01,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:01,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294414416] [2021-03-10 23:06:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294414416] [2021-03-10 23:06:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675962396] [2021-03-10 23:06:01,700 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 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 [2021-03-10 23:06:01,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:06:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:01,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:01,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:01,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:01,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:01,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:01,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:06:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:02,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:02,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:02,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788632540] [2021-03-10 23:06:02,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:02,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:02,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:02,182 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:04,037 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-03-10 23:06:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:06:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:04,039 INFO L225 Difference]: With dead ends: 858 [2021-03-10 23:06:04,039 INFO L226 Difference]: Without dead ends: 799 [2021-03-10 23:06:04,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1642.9ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:06:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-03-10 23:06:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-03-10 23:06:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-03-10 23:06:04,046 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-03-10 23:06:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:04,046 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-03-10 23:06:04,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-03-10 23:06:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:04,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:04,047 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:04,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:04,247 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash 995289705, now seen corresponding path program 76 times [2021-03-10 23:06:04,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:04,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138351408] [2021-03-10 23:06:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:04,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138351408] [2021-03-10 23:06:04,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139723026] [2021-03-10 23:06:04,559 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 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 [2021-03-10 23:06:04,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:06:04,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:04,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:04,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:04,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:04,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:04,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:04,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:05,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:05,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:05,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407553425] [2021-03-10 23:06:05,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:05,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:05,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:05,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:05,055 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:07,804 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-03-10 23:06:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:06:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:07,806 INFO L225 Difference]: With dead ends: 923 [2021-03-10 23:06:07,806 INFO L226 Difference]: Without dead ends: 835 [2021-03-10 23:06:07,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2285.8ms TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 23:06:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-03-10 23:06:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-03-10 23:06:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-03-10 23:06:07,814 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-03-10 23:06:07,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:07,814 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-03-10 23:06:07,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-03-10 23:06:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:07,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:07,815 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:08,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:08,015 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash 354179115, now seen corresponding path program 77 times [2021-03-10 23:06:08,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:08,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339158889] [2021-03-10 23:06:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:08,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339158889] [2021-03-10 23:06:08,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408252756] [2021-03-10 23:06:08,362 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 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 [2021-03-10 23:06:08,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:06:08,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:08,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:08,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:08,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:08,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:08,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:08,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:08,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:08,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:08,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002207287] [2021-03-10 23:06:08,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:08,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:08,831 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:11,597 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-03-10 23:06:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-10 23:06:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:11,599 INFO L225 Difference]: With dead ends: 1025 [2021-03-10 23:06:11,599 INFO L226 Difference]: Without dead ends: 945 [2021-03-10 23:06:11,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2497.5ms TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 23:06:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-03-10 23:06:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-03-10 23:06:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-03-10 23:06:11,607 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-03-10 23:06:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:11,608 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-03-10 23:06:11,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-03-10 23:06:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:11,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:11,609 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:11,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:11,809 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1780421481, now seen corresponding path program 78 times [2021-03-10 23:06:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:11,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545935753] [2021-03-10 23:06:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:12,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545935753] [2021-03-10 23:06:12,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700207382] [2021-03-10 23:06:12,134 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:12,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:06:12,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:12,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:12,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:12,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:12,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:12,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:12,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:12,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:12,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429891048] [2021-03-10 23:06:12,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:12,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:12,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:12,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:12,589 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:16,125 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-03-10 23:06:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 23:06:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:16,127 INFO L225 Difference]: With dead ends: 999 [2021-03-10 23:06:16,127 INFO L226 Difference]: Without dead ends: 943 [2021-03-10 23:06:16,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 2671.4ms TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:06:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-03-10 23:06:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-03-10 23:06:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-03-10 23:06:16,135 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-03-10 23:06:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:16,135 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-03-10 23:06:16,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-03-10 23:06:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:16,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:16,136 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:16,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:16,347 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1675574863, now seen corresponding path program 79 times [2021-03-10 23:06:16,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:16,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327511595] [2021-03-10 23:06:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:16,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327511595] [2021-03-10 23:06:16,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90430338] [2021-03-10 23:06:16,685 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:16,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:16,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:16,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:16,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:16,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:06:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:17,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:17,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534675344] [2021-03-10 23:06:17,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:17,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:17,148 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:19,231 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-03-10 23:06:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:06:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:19,232 INFO L225 Difference]: With dead ends: 987 [2021-03-10 23:06:19,232 INFO L226 Difference]: Without dead ends: 931 [2021-03-10 23:06:19,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1825.3ms TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:06:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-03-10 23:06:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-03-10 23:06:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-03-10 23:06:19,241 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-03-10 23:06:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:19,241 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-03-10 23:06:19,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-03-10 23:06:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:19,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:19,242 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:19,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:19,458 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1261063915, now seen corresponding path program 80 times [2021-03-10 23:06:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:19,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372850270] [2021-03-10 23:06:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372850270] [2021-03-10 23:06:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139401434] [2021-03-10 23:06:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:19,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:06:19,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:20,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:20,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:20,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:20,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:20,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:20,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:20,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:20,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:20,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681690773] [2021-03-10 23:06:20,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:20,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:20,283 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:21,609 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-03-10 23:06:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:06:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:21,611 INFO L225 Difference]: With dead ends: 1026 [2021-03-10 23:06:21,611 INFO L226 Difference]: Without dead ends: 930 [2021-03-10 23:06:21,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1353.2ms TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:06:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-03-10 23:06:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-03-10 23:06:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-03-10 23:06:21,620 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-03-10 23:06:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:21,620 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-03-10 23:06:21,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-03-10 23:06:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:21,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:21,621 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:21,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 23:06:21,822 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash 124558675, now seen corresponding path program 81 times [2021-03-10 23:06:21,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:21,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637884828] [2021-03-10 23:06:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:22,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637884828] [2021-03-10 23:06:22,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657820531] [2021-03-10 23:06:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:22,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:06:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:22,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:22,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:22,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:22,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:22,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:22,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:22,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:22,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:22,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001683348] [2021-03-10 23:06:22,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:22,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:22,646 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:24,049 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-03-10 23:06:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:06:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:24,051 INFO L225 Difference]: With dead ends: 1041 [2021-03-10 23:06:24,051 INFO L226 Difference]: Without dead ends: 953 [2021-03-10 23:06:24,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1378.9ms TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:06:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-03-10 23:06:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-03-10 23:06:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-03-10 23:06:24,060 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-03-10 23:06:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:24,060 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-03-10 23:06:24,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-03-10 23:06:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:24,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:24,062 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:24,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:24,262 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash -516551915, now seen corresponding path program 82 times [2021-03-10 23:06:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:24,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708078793] [2021-03-10 23:06:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708078793] [2021-03-10 23:06:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759202409] [2021-03-10 23:06:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:24,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:06:24,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:24,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:24,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:24,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:24,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:24,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:25,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:25,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196925564] [2021-03-10 23:06:25,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:25,074 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:27,207 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-03-10 23:06:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:06:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:27,209 INFO L225 Difference]: With dead ends: 1128 [2021-03-10 23:06:27,209 INFO L226 Difference]: Without dead ends: 1032 [2021-03-10 23:06:27,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1856.6ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:06:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-03-10 23:06:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-03-10 23:06:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-03-10 23:06:27,218 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-03-10 23:06:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:27,219 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-03-10 23:06:27,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-03-10 23:06:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:27,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:27,220 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:27,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 23:06:27,420 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash 909690451, now seen corresponding path program 83 times [2021-03-10 23:06:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:27,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736994054] [2021-03-10 23:06:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:27,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736994054] [2021-03-10 23:06:27,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560666792] [2021-03-10 23:06:27,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:27,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:06:27,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:28,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:28,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:28,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:28,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:28,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:28,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:28,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:28,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:28,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053175936] [2021-03-10 23:06:28,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:28,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:28,215 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:30,904 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-03-10 23:06:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:06:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:30,907 INFO L225 Difference]: With dead ends: 1294 [2021-03-10 23:06:30,907 INFO L226 Difference]: Without dead ends: 1216 [2021-03-10 23:06:30,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2361.5ms TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:06:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-03-10 23:06:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-03-10 23:06:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-03-10 23:06:30,917 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-03-10 23:06:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:30,917 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-03-10 23:06:30,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-03-10 23:06:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:30,918 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:30,918 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:31,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:31,131 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash -4942295, now seen corresponding path program 84 times [2021-03-10 23:06:31,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:31,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984991024] [2021-03-10 23:06:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:31,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984991024] [2021-03-10 23:06:31,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465227036] [2021-03-10 23:06:31,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:31,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:06:31,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:06:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:31,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:31,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:31,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:31,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:16 [2021-03-10 23:06:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:31,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:31,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-03-10 23:06:31,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803790100] [2021-03-10 23:06:31,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:06:31,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:06:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:06:31,945 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:34,051 INFO L93 Difference]: Finished difference Result 1058 states and 2111 transitions. [2021-03-10 23:06:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:06:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 [2021-03-10 23:06:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:34,053 INFO L225 Difference]: With dead ends: 1058 [2021-03-10 23:06:34,053 INFO L226 Difference]: Without dead ends: 996 [2021-03-10 23:06:34,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1943.2ms TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 23:06:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-03-10 23:06:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 862. [2021-03-10 23:06:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-03-10 23:06:34,063 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-03-10 23:06:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:34,063 INFO L480 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-03-10 23:06:34,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-03-10 23:06:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-03-10 23:06:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:34,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:34,064 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:34,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:34,271 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash 491236367, now seen corresponding path program 85 times [2021-03-10 23:06:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:34,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507477789] [2021-03-10 23:06:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507477789] [2021-03-10 23:06:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134583586] [2021-03-10 23:06:34,584 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:34,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:34,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:34,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:34,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:34,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:34,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:34,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:34,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:35,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:35,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-03-10 23:06:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023712573] [2021-03-10 23:06:35,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:06:35,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:06:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:06:35,082 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-03-10 23:06:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:36,889 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-03-10 23:06:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:06:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 [2021-03-10 23:06:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:36,891 INFO L225 Difference]: With dead ends: 1056 [2021-03-10 23:06:36,891 INFO L226 Difference]: Without dead ends: 968 [2021-03-10 23:06:36,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1634.8ms TimeCoverageRelationStatistics Valid=314, Invalid=3108, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:06:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-03-10 23:06:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-03-10 23:06:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-03-10 23:06:36,900 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-03-10 23:06:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:36,900 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-03-10 23:06:36,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-03-10 23:06:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-03-10 23:06:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:36,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:36,901 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:37,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:37,102 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash -149874223, now seen corresponding path program 86 times [2021-03-10 23:06:37,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:37,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786609889] [2021-03-10 23:06:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:37,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786609889] [2021-03-10 23:06:37,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753950944] [2021-03-10 23:06:37,422 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:37,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:06:37,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:37,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:37,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:37,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:37,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:37,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:37,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:37,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:37,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:37,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:37,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-03-10 23:06:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608141135] [2021-03-10 23:06:37,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:06:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:06:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:06:37,890 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-03-10 23:06:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:39,834 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-03-10 23:06:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:06:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 [2021-03-10 23:06:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:39,836 INFO L225 Difference]: With dead ends: 1078 [2021-03-10 23:06:39,837 INFO L226 Difference]: Without dead ends: 1006 [2021-03-10 23:06:39,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1741.1ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:06:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-03-10 23:06:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-03-10 23:06:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-03-10 23:06:39,846 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-03-10 23:06:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:39,846 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-03-10 23:06:39,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-03-10 23:06:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-03-10 23:06:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:39,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:39,848 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:40,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:40,063 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1276368143, now seen corresponding path program 87 times [2021-03-10 23:06:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:40,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255022224] [2021-03-10 23:06:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255022224] [2021-03-10 23:06:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701015812] [2021-03-10 23:06:40,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:40,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:06:40,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:40,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:40,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:06:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:06:40,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:06:40,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:40,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:40,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:40,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:06:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:40,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:40,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-03-10 23:06:40,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822206240] [2021-03-10 23:06:40,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:06:40,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:40,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:06:40,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:06:40,836 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-03-10 23:06:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:43,325 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-03-10 23:06:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:06:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 [2021-03-10 23:06:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:43,327 INFO L225 Difference]: With dead ends: 1116 [2021-03-10 23:06:43,327 INFO L226 Difference]: Without dead ends: 1054 [2021-03-10 23:06:43,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2098.8ms TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 23:06:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-03-10 23:06:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-03-10 23:06:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-03-10 23:06:43,336 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-03-10 23:06:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:43,336 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-03-10 23:06:43,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-03-10 23:06:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-03-10 23:06:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:43,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:43,337 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:43,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:43,538 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1501435129, now seen corresponding path program 88 times [2021-03-10 23:06:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:43,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646603035] [2021-03-10 23:06:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:43,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646603035] [2021-03-10 23:06:43,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896069513] [2021-03-10 23:06:43,824 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:43,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:06:43,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:43,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:44,175 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:06:44,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:06:44,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:44,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:44,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:44,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:06:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:44,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:44,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:44,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111348306] [2021-03-10 23:06:44,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:44,322 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:45,404 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-03-10 23:06:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:06:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:06:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:45,406 INFO L225 Difference]: With dead ends: 1029 [2021-03-10 23:06:45,406 INFO L226 Difference]: Without dead ends: 981 [2021-03-10 23:06:45,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:06:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-03-10 23:06:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-03-10 23:06:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-03-10 23:06:45,416 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-03-10 23:06:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:45,416 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-03-10 23:06:45,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-03-10 23:06:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:45,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:45,417 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:45,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:45,631 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash -222063415, now seen corresponding path program 89 times [2021-03-10 23:06:45,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:45,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427289119] [2021-03-10 23:06:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:45,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427289119] [2021-03-10 23:06:45,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479358698] [2021-03-10 23:06:45,917 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:45,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:06:45,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:45,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:06:45,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:46,254 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:06:46,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:06:46,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:46,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:46,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:46,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:06:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:46,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:46,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:46,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802343202] [2021-03-10 23:06:46,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:46,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:46,427 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:47,570 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-03-10 23:06:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:06:47,571 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:06:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:47,573 INFO L225 Difference]: With dead ends: 1066 [2021-03-10 23:06:47,573 INFO L226 Difference]: Without dead ends: 1018 [2021-03-10 23:06:47,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1102.0ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:06:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-03-10 23:06:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-03-10 23:06:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-03-10 23:06:47,582 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-03-10 23:06:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:47,582 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-03-10 23:06:47,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-03-10 23:06:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:47,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:47,583 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:47,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-10 23:06:47,783 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1163559175, now seen corresponding path program 90 times [2021-03-10 23:06:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:47,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220897356] [2021-03-10 23:06:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:48,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220897356] [2021-03-10 23:06:48,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403190189] [2021-03-10 23:06:48,072 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:48,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:06:48,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:06:48,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:48,399 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:06:48,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:06:48,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:48,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:48,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:48,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:06:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:48,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:48,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456712663] [2021-03-10 23:06:48,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:48,549 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:49,901 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-03-10 23:06:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:06:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:06:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:49,903 INFO L225 Difference]: With dead ends: 1104 [2021-03-10 23:06:49,903 INFO L226 Difference]: Without dead ends: 1056 [2021-03-10 23:06:49,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1197.6ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:06:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-03-10 23:06:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-03-10 23:06:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-03-10 23:06:49,912 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-03-10 23:06:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:49,912 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-03-10 23:06:49,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-03-10 23:06:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:49,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:49,913 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:50,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:50,113 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:50,114 INFO L82 PathProgramCache]: Analyzing trace with hash 522448585, now seen corresponding path program 91 times [2021-03-10 23:06:50,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:50,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106640993] [2021-03-10 23:06:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106640993] [2021-03-10 23:06:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896137310] [2021-03-10 23:06:50,400 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:50,689 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:06:50,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:06:50,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:50,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:50,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:50,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:06:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:50,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:50,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:50,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180714979] [2021-03-10 23:06:50,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:50,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:50,873 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:52,323 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-03-10 23:06:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:06:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:06:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:52,326 INFO L225 Difference]: With dead ends: 1137 [2021-03-10 23:06:52,326 INFO L226 Difference]: Without dead ends: 1105 [2021-03-10 23:06:52,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:06:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-03-10 23:06:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-03-10 23:06:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-03-10 23:06:52,335 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-03-10 23:06:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:52,335 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-03-10 23:06:52,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-03-10 23:06:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:52,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:52,336 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:52,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 23:06:52,536 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1948690951, now seen corresponding path program 92 times [2021-03-10 23:06:52,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:52,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327661560] [2021-03-10 23:06:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:52,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327661560] [2021-03-10 23:06:52,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996713426] [2021-03-10 23:06:52,873 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:52,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:06:52,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:53,205 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:06:53,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:06:53,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:53,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:53,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:53,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:06:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:53,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:53,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:53,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749241057] [2021-03-10 23:06:53,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:53,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:53,391 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:55,507 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-03-10 23:06:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:06:55,508 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:06:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:55,509 INFO L225 Difference]: With dead ends: 1204 [2021-03-10 23:06:55,509 INFO L226 Difference]: Without dead ends: 1160 [2021-03-10 23:06:55,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1598.8ms TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:06:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-03-10 23:06:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-03-10 23:06:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-03-10 23:06:55,518 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-03-10 23:06:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:55,519 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-03-10 23:06:55,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-03-10 23:06:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:55,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:55,520 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:55,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:55,720 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1310975239, now seen corresponding path program 93 times [2021-03-10 23:06:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:55,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944265216] [2021-03-10 23:06:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944265216] [2021-03-10 23:06:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663463608] [2021-03-10 23:06:56,015 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:56,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:06:56,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:56,291 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:06:56,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:06:56,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:56,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:56,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:56,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-03-10 23:06:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:56,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:56,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721281117] [2021-03-10 23:06:56,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:56,523 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:57,900 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-03-10 23:06:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:06:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:06:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:57,902 INFO L225 Difference]: With dead ends: 1027 [2021-03-10 23:06:57,903 INFO L226 Difference]: Without dead ends: 999 [2021-03-10 23:06:57,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1173.1ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:06:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-03-10 23:06:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-03-10 23:06:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-03-10 23:06:57,911 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-03-10 23:06:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:57,911 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-03-10 23:06:57,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:06:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-03-10 23:06:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:06:57,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:57,913 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:58,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 23:06:58,113 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash -507368251, now seen corresponding path program 94 times [2021-03-10 23:06:58,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:58,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115767208] [2021-03-10 23:06:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:58,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115767208] [2021-03-10 23:06:58,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617806981] [2021-03-10 23:06:58,428 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:58,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:06:58,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:06:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:58,799 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:06:58,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:06:58,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:06:58,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:06:58,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:06:58,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:06:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:58,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:58,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:06:58,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305846660] [2021-03-10 23:06:58,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:06:58,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:06:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:06:58,949 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:00,405 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-03-10 23:07:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:07:00,406 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:00,407 INFO L225 Difference]: With dead ends: 1070 [2021-03-10 23:07:00,407 INFO L226 Difference]: Without dead ends: 974 [2021-03-10 23:07:00,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1484.3ms TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:07:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-03-10 23:07:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-03-10 23:07:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-03-10 23:07:00,416 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-03-10 23:07:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:00,416 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-03-10 23:07:00,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-03-10 23:07:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:00,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:00,417 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:00,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 23:07:00,618 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash 878254339, now seen corresponding path program 95 times [2021-03-10 23:07:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152557324] [2021-03-10 23:07:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:00,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152557324] [2021-03-10 23:07:00,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346687620] [2021-03-10 23:07:00,936 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:00,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:07:00,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:00,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:07:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:01,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:07:01,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:07:01,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:01,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:01,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:01,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:07:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:01,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:01,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-03-10 23:07:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190600732] [2021-03-10 23:07:01,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:07:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:07:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:07:01,519 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-03-10 23:07:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:03,801 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-03-10 23:07:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:07:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 [2021-03-10 23:07:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:03,803 INFO L225 Difference]: With dead ends: 1128 [2021-03-10 23:07:03,803 INFO L226 Difference]: Without dead ends: 1033 [2021-03-10 23:07:03,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 1935.9ms TimeCoverageRelationStatistics Valid=410, Invalid=4282, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:07:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-03-10 23:07:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-03-10 23:07:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-03-10 23:07:03,812 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-03-10 23:07:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:03,812 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-03-10 23:07:03,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-03-10 23:07:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-03-10 23:07:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:03,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:03,814 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:04,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 23:07:04,017 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash 237143749, now seen corresponding path program 96 times [2021-03-10 23:07:04,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:04,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280407261] [2021-03-10 23:07:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280407261] [2021-03-10 23:07:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123402535] [2021-03-10 23:07:04,330 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:04,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:07:04,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:04,636 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:04,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:04,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:04,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:04,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:04,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:07:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:04,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:04,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610983951] [2021-03-10 23:07:04,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:04,824 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:07,270 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-03-10 23:07:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:07:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:07,272 INFO L225 Difference]: With dead ends: 1153 [2021-03-10 23:07:07,272 INFO L226 Difference]: Without dead ends: 1073 [2021-03-10 23:07:07,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2061.2ms TimeCoverageRelationStatistics Valid=537, Invalid=4433, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:07:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-03-10 23:07:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-03-10 23:07:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-03-10 23:07:07,281 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-03-10 23:07:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:07,281 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-03-10 23:07:07,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-03-10 23:07:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:07,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:07,282 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:07,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:07,483 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386115, now seen corresponding path program 97 times [2021-03-10 23:07:07,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:07,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757050143] [2021-03-10 23:07:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:07,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757050143] [2021-03-10 23:07:07,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938360873] [2021-03-10 23:07:07,804 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:07,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:08,133 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:08,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:08,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:08,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:08,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:08,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:07:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:08,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:08,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040692929] [2021-03-10 23:07:08,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:08,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:08,330 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:11,004 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-03-10 23:07:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:07:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:11,007 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 23:07:11,007 INFO L226 Difference]: Without dead ends: 1164 [2021-03-10 23:07:11,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 2182.7ms TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:07:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-03-10 23:07:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-03-10 23:07:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-03-10 23:07:11,017 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-03-10 23:07:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:11,017 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-03-10 23:07:11,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-03-10 23:07:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:11,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:11,019 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:11,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 23:07:11,219 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash 748753369, now seen corresponding path program 98 times [2021-03-10 23:07:11,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:11,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457592461] [2021-03-10 23:07:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:11,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457592461] [2021-03-10 23:07:11,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565678338] [2021-03-10 23:07:11,545 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:11,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:07:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:11,822 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:11,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:11,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:11,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:11,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:07:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:12,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:12,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:12,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172954527] [2021-03-10 23:07:12,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:12,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:12,061 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:14,390 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-03-10 23:07:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:07:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:14,392 INFO L225 Difference]: With dead ends: 1093 [2021-03-10 23:07:14,392 INFO L226 Difference]: Without dead ends: 1034 [2021-03-10 23:07:14,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1912.1ms TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:07:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-03-10 23:07:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-03-10 23:07:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-03-10 23:07:14,402 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-03-10 23:07:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:14,402 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-03-10 23:07:14,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-03-10 23:07:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:14,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:14,403 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:14,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:14,607 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash -834683145, now seen corresponding path program 99 times [2021-03-10 23:07:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:14,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713124098] [2021-03-10 23:07:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:14,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713124098] [2021-03-10 23:07:14,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331669204] [2021-03-10 23:07:14,958 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:07:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:15,334 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:07:15,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:07:15,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:15,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:15,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:15,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:07:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:15,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:15,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:15,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754529693] [2021-03-10 23:07:15,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:15,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:15,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:15,499 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:17,314 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-03-10 23:07:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:07:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:17,316 INFO L225 Difference]: With dead ends: 1156 [2021-03-10 23:07:17,316 INFO L226 Difference]: Without dead ends: 1060 [2021-03-10 23:07:17,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1544.9ms TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:07:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-03-10 23:07:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-03-10 23:07:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-03-10 23:07:17,325 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-03-10 23:07:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:17,325 INFO L480 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-03-10 23:07:17,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-03-10 23:07:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:17,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:17,326 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:17,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 23:07:17,528 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:17,528 INFO L82 PathProgramCache]: Analyzing trace with hash 550939445, now seen corresponding path program 100 times [2021-03-10 23:07:17,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:17,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118355033] [2021-03-10 23:07:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118355033] [2021-03-10 23:07:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591217972] [2021-03-10 23:07:17,872 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:17,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:07:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:18,242 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:18,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:18,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:18,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:18,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:18,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:07:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:18,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:18,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:18,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534595896] [2021-03-10 23:07:18,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:18,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:18,400 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:21,038 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-03-10 23:07:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:07:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:21,041 INFO L225 Difference]: With dead ends: 1272 [2021-03-10 23:07:21,041 INFO L226 Difference]: Without dead ends: 1170 [2021-03-10 23:07:21,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2149.7ms TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:07:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-03-10 23:07:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-03-10 23:07:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-03-10 23:07:21,051 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-03-10 23:07:21,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:21,051 INFO L480 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-03-10 23:07:21,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-03-10 23:07:21,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:21,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:21,052 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:21,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:21,253 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash -90171145, now seen corresponding path program 101 times [2021-03-10 23:07:21,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:21,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593565467] [2021-03-10 23:07:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:21,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593565467] [2021-03-10 23:07:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718515292] [2021-03-10 23:07:21,604 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:21,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:07:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:07:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:07:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:07:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:07:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:07:21,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:21,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:21,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:21,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-03-10 23:07:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:22,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:22,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-03-10 23:07:22,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227813055] [2021-03-10 23:07:22,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:07:22,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:22,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:07:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:07:22,247 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-03-10 23:07:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:26,249 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-03-10 23:07:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 23:07:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 [2021-03-10 23:07:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:26,252 INFO L225 Difference]: With dead ends: 1420 [2021-03-10 23:07:26,252 INFO L226 Difference]: Without dead ends: 1321 [2021-03-10 23:07:26,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 3249.8ms TimeCoverageRelationStatistics Valid=797, Invalid=7945, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 23:07:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-03-10 23:07:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-03-10 23:07:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-03-10 23:07:26,262 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-03-10 23:07:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:26,262 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-03-10 23:07:26,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-03-10 23:07:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-03-10 23:07:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:26,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:26,263 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:26,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:26,464 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1336071221, now seen corresponding path program 102 times [2021-03-10 23:07:26,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:26,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376579624] [2021-03-10 23:07:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:26,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376579624] [2021-03-10 23:07:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366565443] [2021-03-10 23:07:26,824 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:26,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:07:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:07:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:27,150 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:27,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:27,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:27,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:27,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:27,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-03-10 23:07:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:27,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:27,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:27,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940416057] [2021-03-10 23:07:27,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:27,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:27,348 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:31,859 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-03-10 23:07:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 23:07:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:31,862 INFO L225 Difference]: With dead ends: 1535 [2021-03-10 23:07:31,862 INFO L226 Difference]: Without dead ends: 1473 [2021-03-10 23:07:31,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 3154.1ms TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-03-10 23:07:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-03-10 23:07:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-03-10 23:07:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-03-10 23:07:31,874 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-03-10 23:07:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:31,874 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-03-10 23:07:31,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-03-10 23:07:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:31,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:31,875 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:32,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-10 23:07:32,076 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 421438475, now seen corresponding path program 103 times [2021-03-10 23:07:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544174977] [2021-03-10 23:07:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:32,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544174977] [2021-03-10 23:07:32,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358583465] [2021-03-10 23:07:32,452 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:32,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:32,759 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:32,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:32,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:32,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:32,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:07:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:33,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:33,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:33,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589977190] [2021-03-10 23:07:33,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:33,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:33,030 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:35,687 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-03-10 23:07:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:07:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:35,690 INFO L225 Difference]: With dead ends: 1427 [2021-03-10 23:07:35,690 INFO L226 Difference]: Without dead ends: 1371 [2021-03-10 23:07:35,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2124.2ms TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:07:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-03-10 23:07:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-03-10 23:07:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-03-10 23:07:35,701 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-03-10 23:07:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:35,701 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-03-10 23:07:35,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-03-10 23:07:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:35,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:35,703 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:35,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:35,903 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:35,903 INFO L82 PathProgramCache]: Analyzing trace with hash 424854753, now seen corresponding path program 104 times [2021-03-10 23:07:35,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:35,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948296451] [2021-03-10 23:07:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948296451] [2021-03-10 23:07:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668204312] [2021-03-10 23:07:36,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:36,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:07:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:36,696 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:36,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:36,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:36,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:36,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:36,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:07:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:36,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:36,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:36,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738449182] [2021-03-10 23:07:36,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:36,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:36,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:36,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:36,871 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:39,831 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-03-10 23:07:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:07:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:39,834 INFO L225 Difference]: With dead ends: 1723 [2021-03-10 23:07:39,834 INFO L226 Difference]: Without dead ends: 1635 [2021-03-10 23:07:39,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 2695.3ms TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 23:07:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-03-10 23:07:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-03-10 23:07:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-03-10 23:07:39,848 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-03-10 23:07:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:39,848 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-03-10 23:07:39,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-03-10 23:07:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:39,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:39,850 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:40,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:40,059 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:40,060 INFO L82 PathProgramCache]: Analyzing trace with hash -216255837, now seen corresponding path program 105 times [2021-03-10 23:07:40,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:40,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119218966] [2021-03-10 23:07:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:40,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119218966] [2021-03-10 23:07:40,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075437583] [2021-03-10 23:07:40,547 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:40,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:07:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:40,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:07:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:07:40,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:40,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:40,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:40,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:07:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:41,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:41,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:41,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009476246] [2021-03-10 23:07:41,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:41,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:41,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:41,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:41,106 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:44,882 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-03-10 23:07:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-10 23:07:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:44,885 INFO L225 Difference]: With dead ends: 1938 [2021-03-10 23:07:44,885 INFO L226 Difference]: Without dead ends: 1858 [2021-03-10 23:07:44,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3054.2ms TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-03-10 23:07:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-03-10 23:07:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-03-10 23:07:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-03-10 23:07:44,899 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-03-10 23:07:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:44,899 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-03-10 23:07:44,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-03-10 23:07:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:44,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:44,900 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:45,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 23:07:45,101 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1209986529, now seen corresponding path program 106 times [2021-03-10 23:07:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:45,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286348428] [2021-03-10 23:07:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286348428] [2021-03-10 23:07:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069075834] [2021-03-10 23:07:45,528 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:45,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:07:45,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:45,901 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:07:45,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:07:45,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:45,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:45,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:45,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:07:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775218752] [2021-03-10 23:07:46,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:46,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:46,119 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:50,370 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-03-10 23:07:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 23:07:50,371 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:50,374 INFO L225 Difference]: With dead ends: 1677 [2021-03-10 23:07:50,374 INFO L226 Difference]: Without dead ends: 1621 [2021-03-10 23:07:50,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 3483.5ms TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 23:07:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-03-10 23:07:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-03-10 23:07:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-03-10 23:07:50,387 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-03-10 23:07:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:50,387 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-03-10 23:07:50,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-03-10 23:07:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:50,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:50,389 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:50,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 23:07:50,589 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1105139911, now seen corresponding path program 107 times [2021-03-10 23:07:50,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:50,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152373944] [2021-03-10 23:07:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:51,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152373944] [2021-03-10 23:07:51,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397749446] [2021-03-10 23:07:51,058 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:51,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:07:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:07:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:07:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:07:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:07:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-10 23:07:51,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:51,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:51,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:51,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-03-10 23:07:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:51,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:51,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-03-10 23:07:51,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983446836] [2021-03-10 23:07:51,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:07:51,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:51,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:07:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:07:51,893 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-03-10 23:07:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:55,357 INFO L93 Difference]: Finished difference Result 1775 states and 3563 transitions. [2021-03-10 23:07:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:07:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 [2021-03-10 23:07:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:55,361 INFO L225 Difference]: With dead ends: 1775 [2021-03-10 23:07:55,361 INFO L226 Difference]: Without dead ends: 1705 [2021-03-10 23:07:55,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 3003.7ms TimeCoverageRelationStatistics Valid=519, Invalid=4883, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:07:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-03-10 23:07:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-03-10 23:07:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-03-10 23:07:55,374 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-03-10 23:07:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:55,374 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-03-10 23:07:55,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-03-10 23:07:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-03-10 23:07:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:55,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:55,376 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:55,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 23:07:55,576 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1831498867, now seen corresponding path program 108 times [2021-03-10 23:07:55,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:55,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567846447] [2021-03-10 23:07:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:56,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567846447] [2021-03-10 23:07:56,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076506668] [2021-03-10 23:07:56,013 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:56,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:07:56,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:07:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:56,511 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:56,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:56,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:56,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:56,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-03-10 23:07:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:56,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:56,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:07:56,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955044079] [2021-03-10 23:07:56,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:07:56,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:07:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:07:56,734 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:58,786 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-03-10 23:07:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:07:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:07:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:58,789 INFO L225 Difference]: With dead ends: 1677 [2021-03-10 23:07:58,789 INFO L226 Difference]: Without dead ends: 1581 [2021-03-10 23:07:58,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1909.8ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:07:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-03-10 23:07:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-03-10 23:07:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-03-10 23:07:58,803 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-03-10 23:07:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:58,803 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-03-10 23:07:58,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:07:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-03-10 23:07:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:07:58,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:58,805 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:59,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:59,005 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:59,006 INFO L82 PathProgramCache]: Analyzing trace with hash -445876277, now seen corresponding path program 109 times [2021-03-10 23:07:59,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:59,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470512111] [2021-03-10 23:07:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:59,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470512111] [2021-03-10 23:07:59,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905507067] [2021-03-10 23:07:59,443 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:59,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:07:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:59,911 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:07:59,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:07:59,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:07:59,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:07:59,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:07:59,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:08:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:00,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:00,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:00,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962195540] [2021-03-10 23:08:00,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:00,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:00,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:00,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:00,110 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:02,416 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-03-10 23:08:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:08:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:08:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:02,419 INFO L225 Difference]: With dead ends: 1692 [2021-03-10 23:08:02,419 INFO L226 Difference]: Without dead ends: 1604 [2021-03-10 23:08:02,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1953.8ms TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:08:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-03-10 23:08:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-03-10 23:08:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-03-10 23:08:02,434 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-03-10 23:08:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:02,434 INFO L480 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-03-10 23:08:02,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-03-10 23:08:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:02,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:02,435 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:02,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 23:08:02,636 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1086986867, now seen corresponding path program 110 times [2021-03-10 23:08:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:02,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004943723] [2021-03-10 23:08:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:03,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004943723] [2021-03-10 23:08:03,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358268869] [2021-03-10 23:08:03,111 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:03,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:08:03,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:03,508 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:03,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:08:03,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:03,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:03,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:03,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:08:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:03,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:03,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938642388] [2021-03-10 23:08:03,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:03,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:03,776 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:06,764 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-03-10 23:08:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:08:06,765 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:08:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:06,768 INFO L225 Difference]: With dead ends: 1779 [2021-03-10 23:08:06,768 INFO L226 Difference]: Without dead ends: 1683 [2021-03-10 23:08:06,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2668.5ms TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 23:08:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-03-10 23:08:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-03-10 23:08:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-03-10 23:08:06,782 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-03-10 23:08:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:06,782 INFO L480 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-03-10 23:08:06,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-03-10 23:08:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:06,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:06,783 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:06,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 23:08:06,984 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 339255499, now seen corresponding path program 111 times [2021-03-10 23:08:06,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:06,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922860045] [2021-03-10 23:08:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922860045] [2021-03-10 23:08:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784015877] [2021-03-10 23:08:07,457 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:07,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:08:07,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:07,914 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:08:07,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:08:07,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:07,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:07,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:07,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:08:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:08,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:08,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471025843] [2021-03-10 23:08:08,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:08,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:08,158 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:12,537 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-03-10 23:08:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:08:12,539 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:08:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:12,541 INFO L225 Difference]: With dead ends: 1945 [2021-03-10 23:08:12,541 INFO L226 Difference]: Without dead ends: 1867 [2021-03-10 23:08:12,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 3502.2ms TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 23:08:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-03-10 23:08:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-03-10 23:08:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-03-10 23:08:12,556 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-03-10 23:08:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:12,556 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-03-10 23:08:12,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-03-10 23:08:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:12,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:12,558 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:12,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 23:08:12,758 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash -575377247, now seen corresponding path program 112 times [2021-03-10 23:08:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833846997] [2021-03-10 23:08:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:13,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833846997] [2021-03-10 23:08:13,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785566040] [2021-03-10 23:08:13,238 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:13,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:08:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:13,606 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:13,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:08:13,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:13,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:13,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:13,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:08:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:13,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:13,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399734227] [2021-03-10 23:08:13,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:13,928 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:17,326 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-03-10 23:08:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:08:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 [2021-03-10 23:08:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:17,330 INFO L225 Difference]: With dead ends: 1709 [2021-03-10 23:08:17,330 INFO L226 Difference]: Without dead ends: 1647 [2021-03-10 23:08:17,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2917.8ms TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:08:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-03-10 23:08:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-03-10 23:08:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-03-10 23:08:17,345 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-03-10 23:08:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:17,345 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-03-10 23:08:17,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-03-10 23:08:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-03-10 23:08:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:17,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:17,347 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:17,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:17,548 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash -79198585, now seen corresponding path program 113 times [2021-03-10 23:08:17,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:17,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122520431] [2021-03-10 23:08:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122520431] [2021-03-10 23:08:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344897367] [2021-03-10 23:08:18,026 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:18,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:08:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:08:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:18,500 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:08:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:08:18,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:18,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:18,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:18,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:08:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:18,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:18,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 23:08:18,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868382730] [2021-03-10 23:08:18,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:08:18,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:08:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:08:18,802 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-03-10 23:08:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:21,627 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-03-10 23:08:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:08:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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 [2021-03-10 23:08:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:21,631 INFO L225 Difference]: With dead ends: 1663 [2021-03-10 23:08:21,631 INFO L226 Difference]: Without dead ends: 1575 [2021-03-10 23:08:21,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2585.7ms TimeCoverageRelationStatistics Valid=361, Invalid=3545, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:08:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-03-10 23:08:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-03-10 23:08:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-03-10 23:08:21,645 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-03-10 23:08:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:21,645 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-03-10 23:08:21,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-03-10 23:08:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-03-10 23:08:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:21,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:21,647 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:21,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:21,847 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:21,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:21,847 INFO L82 PathProgramCache]: Analyzing trace with hash -720309175, now seen corresponding path program 114 times [2021-03-10 23:08:21,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:21,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553597308] [2021-03-10 23:08:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:22,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553597308] [2021-03-10 23:08:22,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84406646] [2021-03-10 23:08:22,340 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:22,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:08:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:22,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:22,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:22,789 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:22,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-03-10 23:08:22,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:22,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:22,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:22,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-03-10 23:08:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:23,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:23,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-10 23:08:23,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754057690] [2021-03-10 23:08:23,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:08:23,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:08:23,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:08:23,068 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-03-10 23:08:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:25,806 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-03-10 23:08:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:08:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 [2021-03-10 23:08:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:25,809 INFO L225 Difference]: With dead ends: 1683 [2021-03-10 23:08:25,809 INFO L226 Difference]: Without dead ends: 1611 [2021-03-10 23:08:25,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2708.9ms TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:08:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-03-10 23:08:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-03-10 23:08:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-03-10 23:08:25,823 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-03-10 23:08:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:25,823 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-03-10 23:08:25,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-03-10 23:08:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-03-10 23:08:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:25,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:25,825 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:26,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:26,026 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash 705933191, now seen corresponding path program 115 times [2021-03-10 23:08:26,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:26,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375259179] [2021-03-10 23:08:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:26,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375259179] [2021-03-10 23:08:26,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978603322] [2021-03-10 23:08:26,535 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:26,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:26,953 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:08:26,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 23:08:26,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:26,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:26,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:26,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-03-10 23:08:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:27,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:27,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-10 23:08:27,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441217973] [2021-03-10 23:08:27,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:08:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:08:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:08:27,209 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-03-10 23:08:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:30,853 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-03-10 23:08:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:08:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 [2021-03-10 23:08:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:30,856 INFO L225 Difference]: With dead ends: 1719 [2021-03-10 23:08:30,856 INFO L226 Difference]: Without dead ends: 1657 [2021-03-10 23:08:30,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 3238.5ms TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:08:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-03-10 23:08:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-03-10 23:08:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-03-10 23:08:30,870 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-03-10 23:08:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:30,871 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-03-10 23:08:30,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-03-10 23:08:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-03-10 23:08:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:30,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:30,872 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:31,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 23:08:31,073 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583481, now seen corresponding path program 116 times [2021-03-10 23:08:31,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:31,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896078050] [2021-03-10 23:08:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:31,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896078050] [2021-03-10 23:08:31,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956522711] [2021-03-10 23:08:31,574 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:31,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:08:31,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:31,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:31,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:32,117 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:08:32,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:32,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:32,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:32,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:08:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:32,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:32,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:32,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746241218] [2021-03-10 23:08:32,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:32,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:32,409 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:34,654 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-03-10 23:08:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:08:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:08:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:34,658 INFO L225 Difference]: With dead ends: 1608 [2021-03-10 23:08:34,658 INFO L226 Difference]: Without dead ends: 1560 [2021-03-10 23:08:34,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1942.2ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:08:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-03-10 23:08:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-03-10 23:08:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-03-10 23:08:34,681 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-03-10 23:08:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:34,681 INFO L480 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-03-10 23:08:34,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-03-10 23:08:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:34,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:34,682 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:34,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 23:08:34,898 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash -492211767, now seen corresponding path program 117 times [2021-03-10 23:08:34,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:34,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668057994] [2021-03-10 23:08:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668057994] [2021-03-10 23:08:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069788095] [2021-03-10 23:08:35,376 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:35,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:08:35,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:35,909 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:35,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:08:35,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:35,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:35,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:35,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:08:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:36,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:36,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:36,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844640178] [2021-03-10 23:08:36,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:36,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:36,197 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:38,729 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-03-10 23:08:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:08:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:08:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:38,733 INFO L225 Difference]: With dead ends: 1645 [2021-03-10 23:08:38,733 INFO L226 Difference]: Without dead ends: 1597 [2021-03-10 23:08:38,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1919.4ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:08:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-03-10 23:08:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-03-10 23:08:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-03-10 23:08:38,747 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-03-10 23:08:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:38,747 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-03-10 23:08:38,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-03-10 23:08:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:38,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:38,748 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:38,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 23:08:38,948 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash 893410823, now seen corresponding path program 118 times [2021-03-10 23:08:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:38,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53650348] [2021-03-10 23:08:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:39,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53650348] [2021-03-10 23:08:39,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779757220] [2021-03-10 23:08:39,432 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:39,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:08:39,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:39,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:39,991 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:08:39,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:40,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:40,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:40,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:08:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:40,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:40,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:40,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789994353] [2021-03-10 23:08:40,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:40,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:40,276 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:43,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:43,092 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-03-10 23:08:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:08:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:08:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:43,096 INFO L225 Difference]: With dead ends: 1683 [2021-03-10 23:08:43,096 INFO L226 Difference]: Without dead ends: 1635 [2021-03-10 23:08:43,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2072.8ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:08:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-03-10 23:08:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-03-10 23:08:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-03-10 23:08:43,110 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-03-10 23:08:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:43,110 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-03-10 23:08:43,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-03-10 23:08:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:43,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:43,111 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:43,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:43,312 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash 252300233, now seen corresponding path program 119 times [2021-03-10 23:08:43,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:43,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398470164] [2021-03-10 23:08:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:43,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398470164] [2021-03-10 23:08:43,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76420981] [2021-03-10 23:08:43,863 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:43,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:08:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:44,364 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:08:44,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:08:44,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:44,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:44,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:44,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:08:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:44,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:44,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:44,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610364512] [2021-03-10 23:08:44,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:44,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:44,757 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:47,662 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-03-10 23:08:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:08:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:08:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:47,666 INFO L225 Difference]: With dead ends: 1716 [2021-03-10 23:08:47,666 INFO L226 Difference]: Without dead ends: 1684 [2021-03-10 23:08:47,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2405.7ms TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:08:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-03-10 23:08:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-03-10 23:08:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-03-10 23:08:47,680 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-03-10 23:08:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:47,680 INFO L480 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-03-10 23:08:47,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-03-10 23:08:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:47,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:47,682 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:47,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-10 23:08:47,882 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:47,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1678542599, now seen corresponding path program 120 times [2021-03-10 23:08:47,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:47,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820584247] [2021-03-10 23:08:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820584247] [2021-03-10 23:08:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892518101] [2021-03-10 23:08:48,396 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:48,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:08:48,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:48,918 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:48,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:08:48,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:48,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:48,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:48,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:08:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:49,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:49,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416052487] [2021-03-10 23:08:49,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:49,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:49,301 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:52,992 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-03-10 23:08:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:08:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:08:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:52,996 INFO L225 Difference]: With dead ends: 1787 [2021-03-10 23:08:52,996 INFO L226 Difference]: Without dead ends: 1743 [2021-03-10 23:08:52,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2811.0ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:08:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-03-10 23:08:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-03-10 23:08:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-03-10 23:08:53,010 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-03-10 23:08:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:53,010 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-03-10 23:08:53,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-03-10 23:08:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:53,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:53,012 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:53,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:53,215 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:53,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1040826887, now seen corresponding path program 121 times [2021-03-10 23:08:53,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:53,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481578809] [2021-03-10 23:08:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:53,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481578809] [2021-03-10 23:08:53,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701647604] [2021-03-10 23:08:53,765 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:53,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:53,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:54,236 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:08:54,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:08:54,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:54,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:54,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:54,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:08:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:54,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:54,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:54,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182985530] [2021-03-10 23:08:54,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:54,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:54,669 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:57,384 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-03-10 23:08:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:08:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:08:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:57,388 INFO L225 Difference]: With dead ends: 1606 [2021-03-10 23:08:57,388 INFO L226 Difference]: Without dead ends: 1578 [2021-03-10 23:08:57,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2211.5ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:08:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-03-10 23:08:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-03-10 23:08:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-03-10 23:08:57,402 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-03-10 23:08:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:57,402 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-03-10 23:08:57,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-03-10 23:08:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:08:57,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:57,403 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:57,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 23:08:57,607 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash -777516603, now seen corresponding path program 122 times [2021-03-10 23:08:57,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:57,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198389575] [2021-03-10 23:08:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:58,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198389575] [2021-03-10 23:08:58,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999510813] [2021-03-10 23:08:58,173 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:58,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:08:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:08:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:58,789 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:08:58,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:08:58,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:08:58,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:08:58,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:08:58,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:08:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:59,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:59,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:08:59,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753043470] [2021-03-10 23:08:59,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:08:59,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:08:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:08:59,111 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:01,987 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-03-10 23:09:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:09:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:01,991 INFO L225 Difference]: With dead ends: 1650 [2021-03-10 23:09:01,991 INFO L226 Difference]: Without dead ends: 1554 [2021-03-10 23:09:01,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 2752.4ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:09:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-03-10 23:09:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-03-10 23:09:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-03-10 23:09:02,005 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-03-10 23:09:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:02,005 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-03-10 23:09:02,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-03-10 23:09:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:02,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:02,007 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:02,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 23:09:02,208 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 608105987, now seen corresponding path program 123 times [2021-03-10 23:09:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:02,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533520094] [2021-03-10 23:09:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533520094] [2021-03-10 23:09:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511911724] [2021-03-10 23:09:02,769 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:02,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:09:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:09:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:03,366 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:09:03,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:09:03,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:03,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:03,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:03,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:09:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:03,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:03,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:03,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529630249] [2021-03-10 23:09:03,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:03,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:03,666 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:08,147 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-03-10 23:09:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:09:08,149 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:08,151 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 23:09:08,151 INFO L226 Difference]: Without dead ends: 1617 [2021-03-10 23:09:08,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 3282.0ms TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:09:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-03-10 23:09:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-03-10 23:09:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-03-10 23:09:08,166 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-03-10 23:09:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:08,166 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-03-10 23:09:08,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-03-10 23:09:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:08,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:08,167 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:08,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-03-10 23:09:08,369 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash -33004603, now seen corresponding path program 124 times [2021-03-10 23:09:08,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:08,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365063573] [2021-03-10 23:09:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:08,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365063573] [2021-03-10 23:09:08,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967750830] [2021-03-10 23:09:08,932 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:08,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:09:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:09:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:09,442 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:09:09,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:09:09,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:09,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:09,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:09,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:09:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:09,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:09,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:09,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960835893] [2021-03-10 23:09:09,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:09,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:09,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:09,842 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:14,540 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-03-10 23:09:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:09:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:14,544 INFO L225 Difference]: With dead ends: 1736 [2021-03-10 23:09:14,544 INFO L226 Difference]: Without dead ends: 1656 [2021-03-10 23:09:14,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 3713.9ms TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:09:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-03-10 23:09:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-03-10 23:09:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-03-10 23:09:14,559 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-03-10 23:09:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:14,559 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-03-10 23:09:14,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-03-10 23:09:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:14,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:14,560 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:14,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:14,763 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1393237763, now seen corresponding path program 125 times [2021-03-10 23:09:14,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:14,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092826458] [2021-03-10 23:09:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:15,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092826458] [2021-03-10 23:09:15,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146291122] [2021-03-10 23:09:15,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:15,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:09:15,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:09:15,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:15,863 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:09:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:09:15,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:15,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:15,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:15,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:09:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:16,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:16,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:16,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626271393] [2021-03-10 23:09:16,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:16,283 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:22,232 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-03-10 23:09:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:09:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:22,236 INFO L225 Difference]: With dead ends: 1806 [2021-03-10 23:09:22,236 INFO L226 Difference]: Without dead ends: 1747 [2021-03-10 23:09:22,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 4127.7ms TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:09:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-03-10 23:09:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-03-10 23:09:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-03-10 23:09:22,251 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-03-10 23:09:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:22,251 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-03-10 23:09:22,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-03-10 23:09:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:22,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:22,253 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:22,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:22,453 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash 478605017, now seen corresponding path program 126 times [2021-03-10 23:09:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:22,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86447567] [2021-03-10 23:09:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:23,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86447567] [2021-03-10 23:09:23,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773817783] [2021-03-10 23:09:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:23,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:09:23,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:09:23,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:23,567 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:09:23,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:09:23,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:23,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:23,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:23,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-03-10 23:09:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:24,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:24,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:24,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951391497] [2021-03-10 23:09:24,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:24,053 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:28,709 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-03-10 23:09:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:09:28,711 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:28,714 INFO L225 Difference]: With dead ends: 1678 [2021-03-10 23:09:28,714 INFO L226 Difference]: Without dead ends: 1619 [2021-03-10 23:09:28,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 3577.9ms TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:09:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-03-10 23:09:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-03-10 23:09:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-03-10 23:09:28,728 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-03-10 23:09:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:28,728 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-03-10 23:09:28,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-03-10 23:09:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:28,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:28,730 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:28,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:28,940 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1104831497, now seen corresponding path program 127 times [2021-03-10 23:09:28,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:28,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080154198] [2021-03-10 23:09:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:29,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080154198] [2021-03-10 23:09:29,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290634902] [2021-03-10 23:09:29,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:09:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:30,255 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:09:30,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:09:30,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:30,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:30,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:30,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:09:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:30,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:30,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172186091] [2021-03-10 23:09:30,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:30,583 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:34,577 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-03-10 23:09:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:09:34,579 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:34,582 INFO L225 Difference]: With dead ends: 1719 [2021-03-10 23:09:34,582 INFO L226 Difference]: Without dead ends: 1623 [2021-03-10 23:09:34,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 3000.0ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:09:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-03-10 23:09:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-03-10 23:09:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-03-10 23:09:34,597 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-03-10 23:09:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:34,597 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-03-10 23:09:34,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-03-10 23:09:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:34,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:34,599 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:34,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 23:09:34,799 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash 280791093, now seen corresponding path program 128 times [2021-03-10 23:09:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47845685] [2021-03-10 23:09:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47845685] [2021-03-10 23:09:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323585623] [2021-03-10 23:09:35,454 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:35,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:09:35,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:09:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:36,110 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:09:36,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:09:36,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:36,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:36,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:36,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:09:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:36,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356774130] [2021-03-10 23:09:36,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:36,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:36,453 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:41,716 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-03-10 23:09:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:09:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:41,721 INFO L225 Difference]: With dead ends: 1837 [2021-03-10 23:09:41,721 INFO L226 Difference]: Without dead ends: 1735 [2021-03-10 23:09:41,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 4048.8ms TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:09:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-03-10 23:09:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-03-10 23:09:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-03-10 23:09:41,737 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-03-10 23:09:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:41,737 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-03-10 23:09:41,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-03-10 23:09:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:41,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:41,739 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:41,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:41,939 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash -360319497, now seen corresponding path program 129 times [2021-03-10 23:09:41,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:41,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487088326] [2021-03-10 23:09:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:42,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487088326] [2021-03-10 23:09:42,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226546484] [2021-03-10 23:09:42,624 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:42,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:09:42,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:42,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:09:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:43,200 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:09:43,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:09:43,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:43,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:43,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:43,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:09:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:43,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:43,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:43,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464936403] [2021-03-10 23:09:43,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:43,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:43,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:43,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:43,623 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:51,181 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-03-10 23:09:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 23:09:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:09:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:51,185 INFO L225 Difference]: With dead ends: 1994 [2021-03-10 23:09:51,185 INFO L226 Difference]: Without dead ends: 1895 [2021-03-10 23:09:51,186 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 5585.6ms TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 23:09:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-03-10 23:09:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-03-10 23:09:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-03-10 23:09:51,210 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-03-10 23:09:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:51,210 INFO L480 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-03-10 23:09:51,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-03-10 23:09:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:09:51,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:51,212 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:51,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-10 23:09:51,412 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1065922869, now seen corresponding path program 130 times [2021-03-10 23:09:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:51,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306259122] [2021-03-10 23:09:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306259122] [2021-03-10 23:09:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213895725] [2021-03-10 23:09:52,111 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:09:52,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:09:52,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:09:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:52,720 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:09:52,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:09:52,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:09:52,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:09:52,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:09:52,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:09:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:53,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:53,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:09:53,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717803818] [2021-03-10 23:09:53,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:09:53,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:09:53,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:09:53,163 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:01,468 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-03-10 23:10:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 23:10:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:01,473 INFO L225 Difference]: With dead ends: 2110 [2021-03-10 23:10:01,473 INFO L226 Difference]: Without dead ends: 2048 [2021-03-10 23:10:01,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 6152.5ms TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-03-10 23:10:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-03-10 23:10:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-03-10 23:10:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-03-10 23:10:01,491 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-03-10 23:10:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:01,491 INFO L480 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-03-10 23:10:01,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-03-10 23:10:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:01,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:01,493 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:01,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:01,703 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:01,704 INFO L82 PathProgramCache]: Analyzing trace with hash 151290123, now seen corresponding path program 131 times [2021-03-10 23:10:01,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:01,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291470680] [2021-03-10 23:10:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:02,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291470680] [2021-03-10 23:10:02,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070670576] [2021-03-10 23:10:02,500 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:02,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:10:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:10:02,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:03,187 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:10:03,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:10:03,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:10:03,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:10:03,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:10:03,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:10:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:03,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:03,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:10:03,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909514270] [2021-03-10 23:10:03,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:10:03,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:10:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:10:03,762 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:09,886 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-03-10 23:10:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:10:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:09,891 INFO L225 Difference]: With dead ends: 1992 [2021-03-10 23:10:09,891 INFO L226 Difference]: Without dead ends: 1936 [2021-03-10 23:10:09,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 4472.4ms TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:10:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-03-10 23:10:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-03-10 23:10:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-03-10 23:10:09,910 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-03-10 23:10:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:09,910 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-03-10 23:10:09,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-03-10 23:10:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:09,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:09,912 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:10,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:10,128 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash 154706401, now seen corresponding path program 132 times [2021-03-10 23:10:10,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:10,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773678417] [2021-03-10 23:10:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:10,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773678417] [2021-03-10 23:10:10,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088138537] [2021-03-10 23:10:10,961 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:10,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:10:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:10,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 23:10:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:11,904 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:10:11,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:10:11,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:10:11,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:10:11,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:10:11,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-03-10 23:10:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:12,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:12,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-03-10 23:10:12,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48987821] [2021-03-10 23:10:12,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:10:12,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:10:12,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:10:12,305 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:15,092 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:10:16,024 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:10:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:19,796 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-03-10 23:10:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 23:10:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:19,802 INFO L225 Difference]: With dead ends: 2256 [2021-03-10 23:10:19,802 INFO L226 Difference]: Without dead ends: 2168 [2021-03-10 23:10:19,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 5622.7ms TimeCoverageRelationStatistics Valid=525, Invalid=5481, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 23:10:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-03-10 23:10:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-03-10 23:10:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-03-10 23:10:19,829 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-03-10 23:10:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:19,829 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-03-10 23:10:19,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-03-10 23:10:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:19,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:19,831 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:20,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:20,032 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash -486404189, now seen corresponding path program 133 times [2021-03-10 23:10:20,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:20,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490017605] [2021-03-10 23:10:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:20,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490017605] [2021-03-10 23:10:20,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571022522] [2021-03-10 23:10:20,892 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:10:20,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:21,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:10:21,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:10:21,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:10:21,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:10:21,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:10:21,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:10:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:22,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:22,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:10:22,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291716043] [2021-03-10 23:10:22,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:10:22,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:22,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:10:22,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:10:22,129 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:30,043 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-03-10 23:10:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 23:10:30,046 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:30,049 INFO L225 Difference]: With dead ends: 2485 [2021-03-10 23:10:30,049 INFO L226 Difference]: Without dead ends: 2405 [2021-03-10 23:10:30,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 6451.3ms TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 23:10:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-03-10 23:10:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-03-10 23:10:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-03-10 23:10:30,068 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-03-10 23:10:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:30,068 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-03-10 23:10:30,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:30,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-03-10 23:10:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:30,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:30,070 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:30,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 23:10:30,270 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:30,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash 939838177, now seen corresponding path program 134 times [2021-03-10 23:10:30,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:30,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181020214] [2021-03-10 23:10:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:31,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181020214] [2021-03-10 23:10:31,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065234727] [2021-03-10 23:10:31,142 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:31,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:10:31,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:10:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:31,796 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:10:31,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:10:31,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:10:31,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:10:31,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:10:31,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:10:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:32,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:32,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:10:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036060597] [2021-03-10 23:10:32,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:10:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:10:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:10:32,380 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:33,998 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:10:40,529 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:10:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:41,974 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-03-10 23:10:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 23:10:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:41,980 INFO L225 Difference]: With dead ends: 2226 [2021-03-10 23:10:41,980 INFO L226 Difference]: Without dead ends: 2170 [2021-03-10 23:10:41,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 7412.4ms TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-03-10 23:10:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-03-10 23:10:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-03-10 23:10:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-03-10 23:10:42,004 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-03-10 23:10:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:42,004 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-03-10 23:10:42,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-03-10 23:10:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:42,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:42,006 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:42,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:42,207 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash 834991559, now seen corresponding path program 135 times [2021-03-10 23:10:42,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:42,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573093172] [2021-03-10 23:10:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:43,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573093172] [2021-03-10 23:10:43,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454354942] [2021-03-10 23:10:43,086 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:43,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:10:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:10:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:43,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:10:43,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:10:43,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:10:43,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:10:43,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:10:43,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:10:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:44,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:44,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:10:44,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136701565] [2021-03-10 23:10:44,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:10:44,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:44,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:10:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:10:44,382 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:45,850 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:10:46,283 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:10:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:51,505 INFO L93 Difference]: Finished difference Result 2035 states and 4093 transitions. [2021-03-10 23:10:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:10:51,508 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:51,510 INFO L225 Difference]: With dead ends: 2035 [2021-03-10 23:10:51,511 INFO L226 Difference]: Without dead ends: 1979 [2021-03-10 23:10:51,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 5238.0ms TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:10:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-03-10 23:10:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1471. [2021-03-10 23:10:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0258503401360546) internal successors, (2978), 1470 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2978 transitions. [2021-03-10 23:10:51,525 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2978 transitions. Word has length 33 [2021-03-10 23:10:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:51,525 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 2978 transitions. [2021-03-10 23:10:51,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2978 transitions. [2021-03-10 23:10:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:51,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:51,527 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:51,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-03-10 23:10:51,728 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:51,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2101647219, now seen corresponding path program 136 times [2021-03-10 23:10:51,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:51,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385716814] [2021-03-10 23:10:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:52,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385716814] [2021-03-10 23:10:52,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372661970] [2021-03-10 23:10:52,604 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:52,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:10:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:10:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:53,482 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:10:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:10:53,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:10:53,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:10:53,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:10:53,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:10:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:53,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:53,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:10:53,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314025959] [2021-03-10 23:10:53,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:10:53,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:10:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:10:53,910 INFO L87 Difference]: Start difference. First operand 1471 states and 2978 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:58,197 INFO L93 Difference]: Finished difference Result 1668 states and 3337 transitions. [2021-03-10 23:10:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:10:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:10:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:58,202 INFO L225 Difference]: With dead ends: 1668 [2021-03-10 23:10:58,202 INFO L226 Difference]: Without dead ends: 1572 [2021-03-10 23:10:58,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3728.4ms TimeCoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:10:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-03-10 23:10:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1496. [2021-03-10 23:10:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-03-10 23:10:58,216 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-03-10 23:10:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:58,216 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-03-10 23:10:58,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-03-10 23:10:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:10:58,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:58,218 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:58,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:58,435 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:58,435 INFO L82 PathProgramCache]: Analyzing trace with hash -716024629, now seen corresponding path program 137 times [2021-03-10 23:10:58,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:58,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788856722] [2021-03-10 23:10:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:59,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788856722] [2021-03-10 23:10:59,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40426227] [2021-03-10 23:10:59,413 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:59,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:10:59,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:10:59,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:00,255 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:11:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:11:00,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:00,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:00,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:00,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:11:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:00,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:00,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:11:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551528228] [2021-03-10 23:11:00,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:11:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:11:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:11:00,720 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:05,038 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-03-10 23:11:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:11:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:05,043 INFO L225 Difference]: With dead ends: 1683 [2021-03-10 23:11:05,043 INFO L226 Difference]: Without dead ends: 1595 [2021-03-10 23:11:05,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3955.3ms TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:11:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-03-10 23:11:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1499. [2021-03-10 23:11:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0253671562082776) internal successors, (3034), 1498 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3034 transitions. [2021-03-10 23:11:05,057 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3034 transitions. Word has length 33 [2021-03-10 23:11:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:05,057 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3034 transitions. [2021-03-10 23:11:05,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3034 transitions. [2021-03-10 23:11:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:11:05,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:05,059 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:05,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:05,259 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1357135219, now seen corresponding path program 138 times [2021-03-10 23:11:05,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:05,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300627093] [2021-03-10 23:11:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:06,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300627093] [2021-03-10 23:11:06,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938832281] [2021-03-10 23:11:06,121 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:06,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:11:06,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:11:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:06,828 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:11:06,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:11:06,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:06,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:06,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:06,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:11:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:07,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:07,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:11:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388961526] [2021-03-10 23:11:07,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:11:07,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:11:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:11:07,355 INFO L87 Difference]: Start difference. First operand 1499 states and 3034 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:12,870 INFO L93 Difference]: Finished difference Result 1771 states and 3554 transitions. [2021-03-10 23:11:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:11:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:12,875 INFO L225 Difference]: With dead ends: 1771 [2021-03-10 23:11:12,875 INFO L226 Difference]: Without dead ends: 1675 [2021-03-10 23:11:12,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 5063.8ms TimeCoverageRelationStatistics Valid=507, Invalid=4605, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 23:11:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-03-10 23:11:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1504. [2021-03-10 23:11:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 2.0246174318030605) internal successors, (3043), 1503 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 3043 transitions. [2021-03-10 23:11:12,889 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 3043 transitions. Word has length 33 [2021-03-10 23:11:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:12,890 INFO L480 AbstractCegarLoop]: Abstraction has 1504 states and 3043 transitions. [2021-03-10 23:11:12,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 3043 transitions. [2021-03-10 23:11:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:11:12,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:12,891 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:13,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:13,091 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:13,092 INFO L82 PathProgramCache]: Analyzing trace with hash 69107147, now seen corresponding path program 139 times [2021-03-10 23:11:13,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:13,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564250414] [2021-03-10 23:11:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:13,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564250414] [2021-03-10 23:11:13,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340205993] [2021-03-10 23:11:13,974 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:11:13,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:14,676 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:11:14,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:11:14,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:14,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:14,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:14,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:11:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:15,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:15,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:11:15,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134863498] [2021-03-10 23:11:15,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:11:15,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:15,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:11:15,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:11:15,187 INFO L87 Difference]: Start difference. First operand 1504 states and 3043 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:22,681 INFO L93 Difference]: Finished difference Result 1940 states and 3886 transitions. [2021-03-10 23:11:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:11:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:22,686 INFO L225 Difference]: With dead ends: 1940 [2021-03-10 23:11:22,686 INFO L226 Difference]: Without dead ends: 1862 [2021-03-10 23:11:22,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 6251.3ms TimeCoverageRelationStatistics Valid=695, Invalid=6445, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 23:11:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-03-10 23:11:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1495. [2021-03-10 23:11:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0234270414993305) internal successors, (3023), 1494 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3023 transitions. [2021-03-10 23:11:22,699 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3023 transitions. Word has length 33 [2021-03-10 23:11:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:22,699 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3023 transitions. [2021-03-10 23:11:22,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3023 transitions. [2021-03-10 23:11:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:11:22,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:22,701 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:22,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 23:11:22,901 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash -845525599, now seen corresponding path program 140 times [2021-03-10 23:11:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:22,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667203860] [2021-03-10 23:11:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:23,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667203860] [2021-03-10 23:11:23,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941550718] [2021-03-10 23:11:23,742 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:23,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:23,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:11:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:24,453 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:11:24,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:11:24,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:24,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:24,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:24,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:11:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:25,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:25,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-03-10 23:11:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556297380] [2021-03-10 23:11:25,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:11:25,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:11:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:11:25,194 INFO L87 Difference]: Start difference. First operand 1495 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:32,232 INFO L93 Difference]: Finished difference Result 1704 states and 3411 transitions. [2021-03-10 23:11:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:11:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:32,237 INFO L225 Difference]: With dead ends: 1704 [2021-03-10 23:11:32,237 INFO L226 Difference]: Without dead ends: 1642 [2021-03-10 23:11:32,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 5382.1ms TimeCoverageRelationStatistics Valid=515, Invalid=4741, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:11:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-03-10 23:11:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1472. [2021-03-10 23:11:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.025832766825289) internal successors, (2980), 1471 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2980 transitions. [2021-03-10 23:11:32,251 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2980 transitions. Word has length 33 [2021-03-10 23:11:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:32,252 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2980 transitions. [2021-03-10 23:11:32,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2980 transitions. [2021-03-10 23:11:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:11:32,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:32,253 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:32,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-03-10 23:11:32,453 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash -349346937, now seen corresponding path program 141 times [2021-03-10 23:11:32,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:32,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900285164] [2021-03-10 23:11:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:33,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900285164] [2021-03-10 23:11:33,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682764356] [2021-03-10 23:11:33,281 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:33,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:11:33,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:11:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:34,088 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:11:34,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:11:34,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:34,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:34,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:34,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:11:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:34,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:34,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-10 23:11:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153520289] [2021-03-10 23:11:34,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:11:34,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:11:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:11:34,515 INFO L87 Difference]: Start difference. First operand 1472 states and 2980 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:36,266 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:11:36,629 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:11:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:39,970 INFO L93 Difference]: Finished difference Result 1656 states and 3314 transitions. [2021-03-10 23:11:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:11:39,973 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:39,975 INFO L225 Difference]: With dead ends: 1656 [2021-03-10 23:11:39,975 INFO L226 Difference]: Without dead ends: 1568 [2021-03-10 23:11:39,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4306.5ms TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:11:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-03-10 23:11:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1494. [2021-03-10 23:11:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.024112525117214) internal successors, (3022), 1493 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3022 transitions. [2021-03-10 23:11:39,987 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3022 transitions. Word has length 33 [2021-03-10 23:11:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:39,987 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3022 transitions. [2021-03-10 23:11:39,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3022 transitions. [2021-03-10 23:11:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:11:39,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:39,989 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:40,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:40,189 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash -990457527, now seen corresponding path program 142 times [2021-03-10 23:11:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:40,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112231219] [2021-03-10 23:11:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:40,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112231219] [2021-03-10 23:11:40,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946562227] [2021-03-10 23:11:40,992 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:41,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:41,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:11:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:41,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:11:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-10 23:11:41,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:41,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:41,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:41,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-03-10 23:11:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:42,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:42,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-10 23:11:42,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349469261] [2021-03-10 23:11:42,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:11:42,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:42,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:11:42,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:11:42,162 INFO L87 Difference]: Start difference. First operand 1494 states and 3022 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:43,575 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:11:43,909 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:11:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:47,364 INFO L93 Difference]: Finished difference Result 1676 states and 3358 transitions. [2021-03-10 23:11:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:11:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:47,369 INFO L225 Difference]: With dead ends: 1676 [2021-03-10 23:11:47,369 INFO L226 Difference]: Without dead ends: 1604 [2021-03-10 23:11:47,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 4712.9ms TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:11:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-03-10 23:11:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1495. [2021-03-10 23:11:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0240963855421685) internal successors, (3024), 1494 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3024 transitions. [2021-03-10 23:11:47,382 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3024 transitions. Word has length 33 [2021-03-10 23:11:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:47,383 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3024 transitions. [2021-03-10 23:11:47,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3024 transitions. [2021-03-10 23:11:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:11:47,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:47,384 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:47,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-03-10 23:11:47,587 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash 435784839, now seen corresponding path program 143 times [2021-03-10 23:11:47,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:47,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263651353] [2021-03-10 23:11:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:48,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263651353] [2021-03-10 23:11:48,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688055973] [2021-03-10 23:11:48,487 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:48,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:11:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:11:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:49,245 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 23:11:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-03-10 23:11:49,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:49,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:49,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:49,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-03-10 23:11:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:49,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:49,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-10 23:11:49,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674701783] [2021-03-10 23:11:49,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:11:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:11:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:11:49,785 INFO L87 Difference]: Start difference. First operand 1495 states and 3024 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:51,371 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:11:51,716 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:11:52,461 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-10 23:11:53,185 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:11:53,644 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 23:11:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:56,801 INFO L93 Difference]: Finished difference Result 1714 states and 3440 transitions. [2021-03-10 23:11:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:11:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:11:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:56,806 INFO L225 Difference]: With dead ends: 1714 [2021-03-10 23:11:56,806 INFO L226 Difference]: Without dead ends: 1652 [2021-03-10 23:11:56,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 6064.2ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:11:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-03-10 23:11:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1462. [2021-03-10 23:11:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.027378507871321) internal successors, (2962), 1461 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2962 transitions. [2021-03-10 23:11:56,819 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2962 transitions. Word has length 33 [2021-03-10 23:11:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:56,819 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 2962 transitions. [2021-03-10 23:11:56,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2962 transitions. [2021-03-10 23:11:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:11:56,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:56,821 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:57,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 23:11:57,021 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1387234304, now seen corresponding path program 144 times [2021-03-10 23:11:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:57,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225442689] [2021-03-10 23:11:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:57,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225442689] [2021-03-10 23:11:57,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656972564] [2021-03-10 23:11:57,176 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:57,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:11:57,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:11:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:57,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-10 23:11:57,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:57,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:57,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:57,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-03-10 23:11:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:57,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:57,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-10 23:11:57,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403598722] [2021-03-10 23:11:57,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:11:57,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:11:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:11:57,852 INFO L87 Difference]: Start difference. First operand 1462 states and 2962 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-03-10 23:11:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:59,340 INFO L93 Difference]: Finished difference Result 1948 states and 3909 transitions. [2021-03-10 23:11:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:11:59,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 36 [2021-03-10 23:11:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:59,345 INFO L225 Difference]: With dead ends: 1948 [2021-03-10 23:11:59,345 INFO L226 Difference]: Without dead ends: 1945 [2021-03-10 23:11:59,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1149.1ms TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:11:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-03-10 23:11:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1350. [2021-03-10 23:11:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.0148257968865826) internal successors, (2718), 1349 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2718 transitions. [2021-03-10 23:11:59,358 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2718 transitions. Word has length 36 [2021-03-10 23:11:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:59,358 INFO L480 AbstractCegarLoop]: Abstraction has 1350 states and 2718 transitions. [2021-03-10 23:11:59,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-03-10 23:11:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2718 transitions. [2021-03-10 23:11:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:11:59,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:59,359 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:59,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 23:11:59,559 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash 783776818, now seen corresponding path program 145 times [2021-03-10 23:11:59,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:59,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746837729] [2021-03-10 23:11:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:59,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746837729] [2021-03-10 23:11:59,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137521400] [2021-03-10 23:11:59,632 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:59,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:11:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:59,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:59,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:11:59,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575363579] [2021-03-10 23:11:59,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:11:59,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:59,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:11:59,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:11:59,938 INFO L87 Difference]: Start difference. First operand 1350 states and 2718 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-03-10 23:12:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:00,001 INFO L93 Difference]: Finished difference Result 1454 states and 2886 transitions. [2021-03-10 23:12:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:12:00,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 37 [2021-03-10 23:12:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:00,006 INFO L225 Difference]: With dead ends: 1454 [2021-03-10 23:12:00,006 INFO L226 Difference]: Without dead ends: 1399 [2021-03-10 23:12:00,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:12:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-03-10 23:12:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1357. [2021-03-10 23:12:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.0088495575221237) internal successors, (2724), 1356 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2724 transitions. [2021-03-10 23:12:00,024 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2724 transitions. Word has length 37 [2021-03-10 23:12:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:00,024 INFO L480 AbstractCegarLoop]: Abstraction has 1357 states and 2724 transitions. [2021-03-10 23:12:00,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-03-10 23:12:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2724 transitions. [2021-03-10 23:12:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:12:00,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:00,025 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:00,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:00,226 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:00,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2072843805, now seen corresponding path program 146 times [2021-03-10 23:12:00,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:00,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241392625] [2021-03-10 23:12:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:01,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241392625] [2021-03-10 23:12:01,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036607462] [2021-03-10 23:12:01,661 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:01,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:01,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:01,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:12:01,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:02,654 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-10 23:12:02,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-03-10 23:12:02,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:02,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:02,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:02,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-03-10 23:12:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:03,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:03,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-03-10 23:12:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250325386] [2021-03-10 23:12:03,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:12:03,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:12:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:12:03,170 INFO L87 Difference]: Start difference. First operand 1357 states and 2724 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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) [2021-03-10 23:12:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:08,383 INFO L93 Difference]: Finished difference Result 1551 states and 3062 transitions. [2021-03-10 23:12:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:12:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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 40 [2021-03-10 23:12:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:08,388 INFO L225 Difference]: With dead ends: 1551 [2021-03-10 23:12:08,388 INFO L226 Difference]: Without dead ends: 1487 [2021-03-10 23:12:08,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 4540.9ms TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:12:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-03-10 23:12:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1374. [2021-03-10 23:12:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.0043699927166787) internal successors, (2752), 1373 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2752 transitions. [2021-03-10 23:12:08,401 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2752 transitions. Word has length 40 [2021-03-10 23:12:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:08,401 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 2752 transitions. [2021-03-10 23:12:08,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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) [2021-03-10 23:12:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2752 transitions. [2021-03-10 23:12:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:12:08,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:08,402 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:08,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:08,603 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1011750747, now seen corresponding path program 147 times [2021-03-10 23:12:08,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:08,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949772760] [2021-03-10 23:12:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:10,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949772760] [2021-03-10 23:12:10,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667073665] [2021-03-10 23:12:10,000 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:10,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:12:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:10,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 23:12:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:11,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:11,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:12:11,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:11,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:11,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:11,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:12:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:12,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:12,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-03-10 23:12:12,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301696092] [2021-03-10 23:12:12,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:12:12,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:12:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:12:12,352 INFO L87 Difference]: Start difference. First operand 1374 states and 2752 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:18,086 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 23:12:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:19,703 INFO L93 Difference]: Finished difference Result 1579 states and 3117 transitions. [2021-03-10 23:12:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:12:19,707 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:12:19,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:19,709 INFO L225 Difference]: With dead ends: 1579 [2021-03-10 23:12:19,709 INFO L226 Difference]: Without dead ends: 1515 [2021-03-10 23:12:19,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6057.6ms TimeCoverageRelationStatistics Valid=313, Invalid=3847, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:12:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-03-10 23:12:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1380. [2021-03-10 23:12:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.0065264684554025) internal successors, (2767), 1379 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2767 transitions. [2021-03-10 23:12:19,722 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2767 transitions. Word has length 40 [2021-03-10 23:12:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:19,722 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 2767 transitions. [2021-03-10 23:12:19,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2767 transitions. [2021-03-10 23:12:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:12:19,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:19,723 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:19,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-03-10 23:12:19,923 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash -666824675, now seen corresponding path program 148 times [2021-03-10 23:12:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:19,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236854304] [2021-03-10 23:12:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:21,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236854304] [2021-03-10 23:12:21,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959468308] [2021-03-10 23:12:21,316 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:21,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:21,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:21,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:12:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:22,533 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-10 23:12:22,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-03-10 23:12:22,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:22,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:22,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:22,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-03-10 23:12:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:23,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:23,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-03-10 23:12:23,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851953830] [2021-03-10 23:12:23,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:12:23,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:12:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:12:23,061 INFO L87 Difference]: Start difference. First operand 1380 states and 2767 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:29,178 INFO L93 Difference]: Finished difference Result 1604 states and 3165 transitions. [2021-03-10 23:12:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:12:29,180 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:12:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:29,183 INFO L225 Difference]: With dead ends: 1604 [2021-03-10 23:12:29,183 INFO L226 Difference]: Without dead ends: 1540 [2021-03-10 23:12:29,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 4848.1ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:12:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-03-10 23:12:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1381. [2021-03-10 23:12:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.006521739130435) internal successors, (2769), 1380 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2769 transitions. [2021-03-10 23:12:29,195 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2769 transitions. Word has length 40 [2021-03-10 23:12:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:29,195 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2769 transitions. [2021-03-10 23:12:29,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2769 transitions. [2021-03-10 23:12:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:12:29,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:29,196 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:29,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:29,396 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash -252990117, now seen corresponding path program 149 times [2021-03-10 23:12:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:29,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259077923] [2021-03-10 23:12:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259077923] [2021-03-10 23:12:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298004245] [2021-03-10 23:12:30,731 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:30,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:12:30,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:30,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:12:30,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:32,214 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-10 23:12:32,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-03-10 23:12:32,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:32,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:32,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:32,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-03-10 23:12:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:32,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:32,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 37 [2021-03-10 23:12:32,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291524772] [2021-03-10 23:12:32,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:12:32,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:12:32,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:12:32,771 INFO L87 Difference]: Start difference. First operand 1381 states and 2769 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:38,635 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:12:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:40,538 INFO L93 Difference]: Finished difference Result 1645 states and 3248 transitions. [2021-03-10 23:12:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:12:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:12:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:40,543 INFO L225 Difference]: With dead ends: 1645 [2021-03-10 23:12:40,544 INFO L226 Difference]: Without dead ends: 1581 [2021-03-10 23:12:40,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 5479.9ms TimeCoverageRelationStatistics Valid=269, Invalid=3513, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:12:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-03-10 23:12:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1385. [2021-03-10 23:12:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.0065028901734103) internal successors, (2777), 1384 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2777 transitions. [2021-03-10 23:12:40,556 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2777 transitions. Word has length 40 [2021-03-10 23:12:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:40,556 INFO L480 AbstractCegarLoop]: Abstraction has 1385 states and 2777 transitions. [2021-03-10 23:12:40,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2777 transitions. [2021-03-10 23:12:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:12:40,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:40,557 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:40,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:40,757 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash -924554723, now seen corresponding path program 150 times [2021-03-10 23:12:40,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:40,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171894171] [2021-03-10 23:12:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171894171] [2021-03-10 23:12:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776544937] [2021-03-10 23:12:42,200 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:42,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:12:42,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:42,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:12:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:43,424 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-10 23:12:43,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-03-10 23:12:43,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:43,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:43,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:43,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-03-10 23:12:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:43,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:43,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-03-10 23:12:43,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989018482] [2021-03-10 23:12:43,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:12:43,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:43,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:12:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:12:43,937 INFO L87 Difference]: Start difference. First operand 1385 states and 2777 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:50,856 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 23:12:51,824 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:12:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:52,925 INFO L93 Difference]: Finished difference Result 1660 states and 3278 transitions. [2021-03-10 23:12:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:12:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:12:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:52,930 INFO L225 Difference]: With dead ends: 1660 [2021-03-10 23:12:52,930 INFO L226 Difference]: Without dead ends: 1612 [2021-03-10 23:12:52,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 6110.5ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:12:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-03-10 23:12:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1386. [2021-03-10 23:12:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.0064981949458485) internal successors, (2779), 1385 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) [2021-03-10 23:12:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2779 transitions. [2021-03-10 23:12:52,941 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2779 transitions. Word has length 40 [2021-03-10 23:12:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:52,941 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 2779 transitions. [2021-03-10 23:12:52,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2779 transitions. [2021-03-10 23:12:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:12:52,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:52,942 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:53,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:53,143 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash 461067867, now seen corresponding path program 151 times [2021-03-10 23:12:53,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:53,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58430974] [2021-03-10 23:12:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:54,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58430974] [2021-03-10 23:12:54,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131098194] [2021-03-10 23:12:54,316 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:54,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:12:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:55,335 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-10 23:12:55,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-03-10 23:12:55,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:55,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:55,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:55,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-03-10 23:12:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:55,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:55,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-03-10 23:12:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281254921] [2021-03-10 23:12:55,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:12:55,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:12:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:12:55,840 INFO L87 Difference]: Start difference. First operand 1386 states and 2779 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:04,478 INFO L93 Difference]: Finished difference Result 1719 states and 3396 transitions. [2021-03-10 23:13:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:13:04,481 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:04,482 INFO L225 Difference]: With dead ends: 1719 [2021-03-10 23:13:04,482 INFO L226 Difference]: Without dead ends: 1659 [2021-03-10 23:13:04,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 5694.4ms TimeCoverageRelationStatistics Valid=353, Invalid=4617, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:13:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-03-10 23:13:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1393. [2021-03-10 23:13:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.0064655172413794) internal successors, (2793), 1392 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2793 transitions. [2021-03-10 23:13:04,493 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2793 transitions. Word has length 40 [2021-03-10 23:13:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:04,494 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 2793 transitions. [2021-03-10 23:13:04,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2793 transitions. [2021-03-10 23:13:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:04,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:04,495 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:04,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:04,695 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:04,695 INFO L82 PathProgramCache]: Analyzing trace with hash -180042723, now seen corresponding path program 152 times [2021-03-10 23:13:04,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:04,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21338187] [2021-03-10 23:13:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:05,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21338187] [2021-03-10 23:13:05,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207409670] [2021-03-10 23:13:05,814 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:05,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:05,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:05,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:13:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:06,767 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-10 23:13:06,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-03-10 23:13:06,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:06,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:06,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:06,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-03-10 23:13:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:07,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:07,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-03-10 23:13:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372491040] [2021-03-10 23:13:07,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:13:07,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:13:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:13:07,351 INFO L87 Difference]: Start difference. First operand 1393 states and 2793 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:15,414 INFO L93 Difference]: Finished difference Result 1712 states and 3382 transitions. [2021-03-10 23:13:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:13:15,417 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:15,418 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 23:13:15,418 INFO L226 Difference]: Without dead ends: 1680 [2021-03-10 23:13:15,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 5852.1ms TimeCoverageRelationStatistics Valid=384, Invalid=4872, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:13:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-03-10 23:13:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1394. [2021-03-10 23:13:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 2.0064608758076097) internal successors, (2795), 1393 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2795 transitions. [2021-03-10 23:13:15,429 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2795 transitions. Word has length 40 [2021-03-10 23:13:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:15,429 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 2795 transitions. [2021-03-10 23:13:15,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2795 transitions. [2021-03-10 23:13:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:15,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:15,430 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:15,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:15,635 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1246199643, now seen corresponding path program 153 times [2021-03-10 23:13:15,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:15,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967731707] [2021-03-10 23:13:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:16,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967731707] [2021-03-10 23:13:16,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280857956] [2021-03-10 23:13:16,882 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:16,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:13:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:16,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-03-10 23:13:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:17,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 23:13:17,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:17,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:17,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:17,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:25 [2021-03-10 23:13:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:19,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:19,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-03-10 23:13:19,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337533067] [2021-03-10 23:13:19,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:13:19,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:19,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:13:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:13:19,298 INFO L87 Difference]: Start difference. First operand 1394 states and 2795 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:32,041 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-10 23:13:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:32,926 INFO L93 Difference]: Finished difference Result 1780 states and 3513 transitions. [2021-03-10 23:13:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 23:13:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:32,930 INFO L225 Difference]: With dead ends: 1780 [2021-03-10 23:13:32,930 INFO L226 Difference]: Without dead ends: 1734 [2021-03-10 23:13:32,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 10379.6ms TimeCoverageRelationStatistics Valid=666, Invalid=9234, Unknown=0, NotChecked=0, Total=9900 [2021-03-10 23:13:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-03-10 23:13:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1399. [2021-03-10 23:13:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.0085836909871246) internal successors, (2808), 1398 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2808 transitions. [2021-03-10 23:13:32,943 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2808 transitions. Word has length 40 [2021-03-10 23:13:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:32,943 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 2808 transitions. [2021-03-10 23:13:32,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2808 transitions. [2021-03-10 23:13:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:32,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:32,944 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:33,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:33,144 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1566768791, now seen corresponding path program 154 times [2021-03-10 23:13:33,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:33,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889118173] [2021-03-10 23:13:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:34,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889118173] [2021-03-10 23:13:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486102711] [2021-03-10 23:13:34,314 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:34,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:34,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:34,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:13:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:35,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:35,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:35,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:13:35,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:35,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:35,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:35,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:13:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:36,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:36,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:13:36,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441846731] [2021-03-10 23:13:36,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:13:36,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:13:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:13:36,214 INFO L87 Difference]: Start difference. First operand 1399 states and 2808 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:41,307 INFO L93 Difference]: Finished difference Result 1516 states and 3019 transitions. [2021-03-10 23:13:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:13:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:41,312 INFO L225 Difference]: With dead ends: 1516 [2021-03-10 23:13:41,312 INFO L226 Difference]: Without dead ends: 1475 [2021-03-10 23:13:41,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 4424.7ms TimeCoverageRelationStatistics Valid=221, Invalid=2859, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:13:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-03-10 23:13:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1396. [2021-03-10 23:13:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.0064516129032257) internal successors, (2799), 1395 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2799 transitions. [2021-03-10 23:13:41,327 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2799 transitions. Word has length 40 [2021-03-10 23:13:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:41,327 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 2799 transitions. [2021-03-10 23:13:41,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2799 transitions. [2021-03-10 23:13:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:41,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:41,328 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:41,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:41,529 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:41,529 INFO L82 PathProgramCache]: Analyzing trace with hash 925658201, now seen corresponding path program 155 times [2021-03-10 23:13:41,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:41,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345938985] [2021-03-10 23:13:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345938985] [2021-03-10 23:13:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050404069] [2021-03-10 23:13:42,790 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:42,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:13:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:13:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:44,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-03-10 23:13:44,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:44,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:44,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:44,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-03-10 23:13:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:44,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:44,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:13:44,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670800186] [2021-03-10 23:13:44,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:13:44,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:44,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:13:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:13:44,647 INFO L87 Difference]: Start difference. First operand 1396 states and 2799 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:49,174 INFO L93 Difference]: Finished difference Result 1523 states and 3034 transitions. [2021-03-10 23:13:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:13:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:49,177 INFO L225 Difference]: With dead ends: 1523 [2021-03-10 23:13:49,177 INFO L226 Difference]: Without dead ends: 1494 [2021-03-10 23:13:49,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 4399.5ms TimeCoverageRelationStatistics Valid=240, Invalid=2840, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:13:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-03-10 23:13:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1393. [2021-03-10 23:13:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.0064655172413794) internal successors, (2793), 1392 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2793 transitions. [2021-03-10 23:13:49,187 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2793 transitions. Word has length 40 [2021-03-10 23:13:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:49,187 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 2793 transitions. [2021-03-10 23:13:49,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2793 transitions. [2021-03-10 23:13:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:49,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:49,188 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:49,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:49,389 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -214369713, now seen corresponding path program 156 times [2021-03-10 23:13:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:49,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296190605] [2021-03-10 23:13:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:50,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296190605] [2021-03-10 23:13:50,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474133627] [2021-03-10 23:13:50,503 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:50,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:13:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:50,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:13:50,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:51,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:13:51,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:51,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:51,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:51,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-03-10 23:13:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:52,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:52,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:13:52,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284669345] [2021-03-10 23:13:52,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:13:52,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:13:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:13:52,178 INFO L87 Difference]: Start difference. First operand 1393 states and 2793 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:56,681 INFO L93 Difference]: Finished difference Result 1521 states and 3030 transitions. [2021-03-10 23:13:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:13:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:56,685 INFO L225 Difference]: With dead ends: 1521 [2021-03-10 23:13:56,685 INFO L226 Difference]: Without dead ends: 1492 [2021-03-10 23:13:56,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 3921.6ms TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:13:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-10 23:13:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1391. [2021-03-10 23:13:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.0064748201438847) internal successors, (2789), 1390 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2789 transitions. [2021-03-10 23:13:56,695 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2789 transitions. Word has length 40 [2021-03-10 23:13:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:56,695 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2789 transitions. [2021-03-10 23:13:56,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2789 transitions. [2021-03-10 23:13:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:56,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:56,696 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:56,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-03-10 23:13:56,897 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2047913347, now seen corresponding path program 157 times [2021-03-10 23:13:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:56,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787988943] [2021-03-10 23:13:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:58,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787988943] [2021-03-10 23:13:58,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647696179] [2021-03-10 23:13:58,034 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:58,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:13:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:13:59,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:59,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:59,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:59,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-03-10 23:13:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:59,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:59,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:13:59,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053209256] [2021-03-10 23:13:59,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:13:59,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:13:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:13:59,727 INFO L87 Difference]: Start difference. First operand 1391 states and 2789 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:05,178 INFO L93 Difference]: Finished difference Result 1521 states and 3030 transitions. [2021-03-10 23:14:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:14:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:14:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:05,182 INFO L225 Difference]: With dead ends: 1521 [2021-03-10 23:14:05,182 INFO L226 Difference]: Without dead ends: 1493 [2021-03-10 23:14:05,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 4296.9ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:14:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-03-10 23:14:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1384. [2021-03-10 23:14:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.0065075921908893) internal successors, (2775), 1383 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2775 transitions. [2021-03-10 23:14:05,193 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2775 transitions. Word has length 40 [2021-03-10 23:14:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:05,193 INFO L480 AbstractCegarLoop]: Abstraction has 1384 states and 2775 transitions. [2021-03-10 23:14:05,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2775 transitions. [2021-03-10 23:14:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:14:05,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:05,194 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:05,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:05,394 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1924564705, now seen corresponding path program 158 times [2021-03-10 23:14:05,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:05,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136896076] [2021-03-10 23:14:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136896076] [2021-03-10 23:14:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176793598] [2021-03-10 23:14:06,560 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:06,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:06,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:06,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:14:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:14:07,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:07,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:07,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:07,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:14:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:08,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:08,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:14:08,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333046740] [2021-03-10 23:14:08,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:14:08,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:14:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:14:08,344 INFO L87 Difference]: Start difference. First operand 1384 states and 2775 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:13,652 INFO L93 Difference]: Finished difference Result 1574 states and 3112 transitions. [2021-03-10 23:14:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:14:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:14:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:13,656 INFO L225 Difference]: With dead ends: 1574 [2021-03-10 23:14:13,656 INFO L226 Difference]: Without dead ends: 1510 [2021-03-10 23:14:13,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4226.0ms TimeCoverageRelationStatistics Valid=233, Invalid=2959, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:14:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-03-10 23:14:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1393. [2021-03-10 23:14:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.0086206896551726) internal successors, (2796), 1392 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) [2021-03-10 23:14:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2796 transitions. [2021-03-10 23:14:13,666 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2796 transitions. Word has length 40 [2021-03-10 23:14:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:13,666 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 2796 transitions. [2021-03-10 23:14:13,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2796 transitions. [2021-03-10 23:14:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:14:13,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:13,667 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:13,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:13,867 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash 691827169, now seen corresponding path program 159 times [2021-03-10 23:14:13,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:13,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722644927] [2021-03-10 23:14:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:15,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722644927] [2021-03-10 23:14:15,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246868064] [2021-03-10 23:14:15,056 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:15,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:14:15,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:15,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:14:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:16,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:14:16,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:16,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:16,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:16,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:14:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:16,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:16,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:14:16,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497006492] [2021-03-10 23:14:16,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:14:16,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:14:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:14:16,917 INFO L87 Difference]: Start difference. First operand 1393 states and 2796 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:21,817 INFO L93 Difference]: Finished difference Result 1615 states and 3188 transitions. [2021-03-10 23:14:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:14:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:14:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:21,822 INFO L225 Difference]: With dead ends: 1615 [2021-03-10 23:14:21,822 INFO L226 Difference]: Without dead ends: 1551 [2021-03-10 23:14:21,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4416.8ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:14:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2021-03-10 23:14:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1394. [2021-03-10 23:14:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 2.0086145010768126) internal successors, (2798), 1393 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2798 transitions. [2021-03-10 23:14:21,832 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2798 transitions. Word has length 40 [2021-03-10 23:14:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:21,832 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 2798 transitions. [2021-03-10 23:14:21,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2798 transitions. [2021-03-10 23:14:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:14:21,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:21,833 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:22,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:22,033 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:22,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1105661727, now seen corresponding path program 160 times [2021-03-10 23:14:22,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:22,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765701530] [2021-03-10 23:14:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:23,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765701530] [2021-03-10 23:14:23,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946950749] [2021-03-10 23:14:23,274 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:23,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:23,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:14:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:24,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:14:24,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:24,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:24,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:24,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:14:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:25,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:25,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:14:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025722533] [2021-03-10 23:14:25,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:14:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:14:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:14:25,170 INFO L87 Difference]: Start difference. First operand 1394 states and 2798 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:31,809 INFO L93 Difference]: Finished difference Result 1652 states and 3262 transitions. [2021-03-10 23:14:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:14:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:14:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:31,813 INFO L225 Difference]: With dead ends: 1652 [2021-03-10 23:14:31,813 INFO L226 Difference]: Without dead ends: 1588 [2021-03-10 23:14:31,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 4790.6ms TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:14:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-03-10 23:14:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1398. [2021-03-10 23:14:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.008589835361489) internal successors, (2806), 1397 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2806 transitions. [2021-03-10 23:14:31,824 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2806 transitions. Word has length 40 [2021-03-10 23:14:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:31,824 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 2806 transitions. [2021-03-10 23:14:31,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2806 transitions. [2021-03-10 23:14:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:14:31,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:31,825 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:32,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:32,031 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 434097121, now seen corresponding path program 161 times [2021-03-10 23:14:32,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:32,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888725326] [2021-03-10 23:14:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:33,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888725326] [2021-03-10 23:14:33,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196955139] [2021-03-10 23:14:33,237 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:33,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:14:33,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:33,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:14:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:34,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:34,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:14:34,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:34,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:34,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:34,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:14:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:35,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:35,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:14:35,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578241477] [2021-03-10 23:14:35,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:14:35,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:35,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:14:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:14:35,076 INFO L87 Difference]: Start difference. First operand 1398 states and 2806 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:39,830 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:14:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:41,524 INFO L93 Difference]: Finished difference Result 1660 states and 3278 transitions. [2021-03-10 23:14:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:14:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:14:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:41,528 INFO L225 Difference]: With dead ends: 1660 [2021-03-10 23:14:41,528 INFO L226 Difference]: Without dead ends: 1612 [2021-03-10 23:14:41,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 4930.5ms TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:14:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-03-10 23:14:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1399. [2021-03-10 23:14:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.0085836909871246) internal successors, (2808), 1398 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2808 transitions. [2021-03-10 23:14:41,538 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2808 transitions. Word has length 40 [2021-03-10 23:14:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:41,538 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 2808 transitions. [2021-03-10 23:14:41,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2808 transitions. [2021-03-10 23:14:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:14:41,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:41,539 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:41,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-03-10 23:14:41,747 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1819719711, now seen corresponding path program 162 times [2021-03-10 23:14:41,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:41,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312730084] [2021-03-10 23:14:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312730084] [2021-03-10 23:14:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863757769] [2021-03-10 23:14:42,948 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:42,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:14:42,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:42,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:14:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:44,528 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:14:44,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:14:44,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:44,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:44,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:44,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:14:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:45,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:45,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-03-10 23:14:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041992516] [2021-03-10 23:14:45,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 23:14:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 23:14:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:14:45,203 INFO L87 Difference]: Start difference. First operand 1399 states and 2808 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:49,788 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-10 23:14:50,929 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:14:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:54,511 INFO L93 Difference]: Finished difference Result 1716 states and 3395 transitions. [2021-03-10 23:14:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:14:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:14:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:54,516 INFO L225 Difference]: With dead ends: 1716 [2021-03-10 23:14:54,516 INFO L226 Difference]: Without dead ends: 1672 [2021-03-10 23:14:54,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 7356.5ms TimeCoverageRelationStatistics Valid=439, Invalid=5723, Unknown=0, NotChecked=0, Total=6162 [2021-03-10 23:14:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-03-10 23:14:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1414. [2021-03-10 23:14:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 2.010615711252654) internal successors, (2841), 1413 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2841 transitions. [2021-03-10 23:14:54,526 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2841 transitions. Word has length 40 [2021-03-10 23:14:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:54,527 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 2841 transitions. [2021-03-10 23:14:54,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2841 transitions. [2021-03-10 23:14:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:14:54,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:54,528 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:54,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 23:14:54,728 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1178609121, now seen corresponding path program 163 times [2021-03-10 23:14:54,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:54,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790250911] [2021-03-10 23:14:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790250911] [2021-03-10 23:14:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705513490] [2021-03-10 23:14:56,071 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:56,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:14:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:57,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:57,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:57,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:14:57,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:57,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:57,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:57,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:14:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:57,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:57,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:14:57,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818560561] [2021-03-10 23:14:57,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:14:57,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:14:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:14:57,939 INFO L87 Difference]: Start difference. First operand 1414 states and 2841 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:01,577 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-10 23:15:02,214 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:15:05,092 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 23:15:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:06,281 INFO L93 Difference]: Finished difference Result 1741 states and 3436 transitions. [2021-03-10 23:15:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:15:06,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:15:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:06,285 INFO L225 Difference]: With dead ends: 1741 [2021-03-10 23:15:06,285 INFO L226 Difference]: Without dead ends: 1684 [2021-03-10 23:15:06,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 5974.1ms TimeCoverageRelationStatistics Valid=332, Invalid=4090, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:15:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-03-10 23:15:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1407. [2021-03-10 23:15:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 2.008534850640114) internal successors, (2824), 1406 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2824 transitions. [2021-03-10 23:15:06,297 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2824 transitions. Word has length 40 [2021-03-10 23:15:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:06,297 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 2824 transitions. [2021-03-10 23:15:06,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2824 transitions. [2021-03-10 23:15:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:15:06,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:06,298 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:06,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:06,507 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1690115809, now seen corresponding path program 164 times [2021-03-10 23:15:06,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:06,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701263247] [2021-03-10 23:15:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:07,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701263247] [2021-03-10 23:15:07,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063769138] [2021-03-10 23:15:07,807 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:07,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:15:07,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:07,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:15:07,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:09,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:09,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:09,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:15:09,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:09,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:09,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:09,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:15:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:09,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:09,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:15:09,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429687271] [2021-03-10 23:15:09,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:09,834 INFO L87 Difference]: Start difference. First operand 1407 states and 2824 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:17,629 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:15:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:19,642 INFO L93 Difference]: Finished difference Result 1776 states and 3505 transitions. [2021-03-10 23:15:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:15:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:15:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:19,647 INFO L225 Difference]: With dead ends: 1776 [2021-03-10 23:15:19,647 INFO L226 Difference]: Without dead ends: 1732 [2021-03-10 23:15:19,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 6867.0ms TimeCoverageRelationStatistics Valid=380, Invalid=4876, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:15:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-03-10 23:15:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1399. [2021-03-10 23:15:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.0064377682403434) internal successors, (2805), 1398 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2805 transitions. [2021-03-10 23:15:19,658 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2805 transitions. Word has length 40 [2021-03-10 23:15:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:19,658 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 2805 transitions. [2021-03-10 23:15:19,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2805 transitions. [2021-03-10 23:15:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:15:19,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:19,659 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:19,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 23:15:19,859 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1743439621, now seen corresponding path program 165 times [2021-03-10 23:15:19,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:19,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553014621] [2021-03-10 23:15:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:21,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553014621] [2021-03-10 23:15:21,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202987574] [2021-03-10 23:15:21,297 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:21,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:15:21,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:21,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-03-10 23:15:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:22,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:22,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 23:15:22,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:22,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:22,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:22,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-03-10 23:15:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:24,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:24,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-03-10 23:15:24,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165848429] [2021-03-10 23:15:24,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:15:24,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:15:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:15:24,405 INFO L87 Difference]: Start difference. First operand 1399 states and 2805 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:28,613 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:15:28,953 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-10 23:15:29,357 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:15:30,151 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 23:15:30,445 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:15:31,526 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:15:31,743 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-03-10 23:15:31,984 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-10 23:15:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:33,364 INFO L93 Difference]: Finished difference Result 1542 states and 3067 transitions. [2021-03-10 23:15:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:15:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:15:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:33,368 INFO L225 Difference]: With dead ends: 1542 [2021-03-10 23:15:33,368 INFO L226 Difference]: Without dead ends: 1500 [2021-03-10 23:15:33,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 7923.5ms TimeCoverageRelationStatistics Valid=358, Invalid=4198, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 23:15:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-03-10 23:15:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1387. [2021-03-10 23:15:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 2.0064935064935066) internal successors, (2781), 1386 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2781 transitions. [2021-03-10 23:15:33,379 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2781 transitions. Word has length 40 [2021-03-10 23:15:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:33,379 INFO L480 AbstractCegarLoop]: Abstraction has 1387 states and 2781 transitions. [2021-03-10 23:15:33,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2781 transitions. [2021-03-10 23:15:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:15:33,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:33,380 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:33,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-03-10 23:15:33,580 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -956912675, now seen corresponding path program 166 times [2021-03-10 23:15:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:33,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248481202] [2021-03-10 23:15:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:35,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248481202] [2021-03-10 23:15:35,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801396555] [2021-03-10 23:15:35,064 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:35,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:35,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:15:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:36,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:36,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:15:36,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:36,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:36,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:36,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:15:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:37,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:37,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:15:37,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144844682] [2021-03-10 23:15:37,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:37,162 INFO L87 Difference]: Start difference. First operand 1387 states and 2781 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:41,137 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:15:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:42,630 INFO L93 Difference]: Finished difference Result 1526 states and 3032 transitions. [2021-03-10 23:15:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:15:42,633 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:15:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:42,634 INFO L225 Difference]: With dead ends: 1526 [2021-03-10 23:15:42,634 INFO L226 Difference]: Without dead ends: 1462 [2021-03-10 23:15:42,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 5150.9ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:15:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-03-10 23:15:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1390. [2021-03-10 23:15:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 2.0064794816414686) internal successors, (2787), 1389 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2787 transitions. [2021-03-10 23:15:42,644 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2787 transitions. Word has length 40 [2021-03-10 23:15:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:42,645 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 2787 transitions. [2021-03-10 23:15:42,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2787 transitions. [2021-03-10 23:15:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:15:42,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:42,646 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:42,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-03-10 23:15:42,846 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash -543078117, now seen corresponding path program 167 times [2021-03-10 23:15:42,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:42,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439661908] [2021-03-10 23:15:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439661908] [2021-03-10 23:15:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282804420] [2021-03-10 23:15:44,328 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:44,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:15:44,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:44,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:15:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:45,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:45,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-03-10 23:15:45,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:45,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:45,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:45,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-03-10 23:15:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:46,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:46,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:15:46,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673236766] [2021-03-10 23:15:46,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:46,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:46,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:46,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:46,538 INFO L87 Difference]: Start difference. First operand 1390 states and 2787 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:50,116 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:15:50,596 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-10 23:15:51,268 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:15:52,091 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:15:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:53,117 INFO L93 Difference]: Finished difference Result 1531 states and 3045 transitions. [2021-03-10 23:15:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:15:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:15:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:53,122 INFO L225 Difference]: With dead ends: 1531 [2021-03-10 23:15:53,122 INFO L226 Difference]: Without dead ends: 1471 [2021-03-10 23:15:53,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 5438.7ms TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:15:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-03-10 23:15:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1396. [2021-03-10 23:15:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.0064516129032257) internal successors, (2799), 1395 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2799 transitions. [2021-03-10 23:15:53,132 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2799 transitions. Word has length 40 [2021-03-10 23:15:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:53,133 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 2799 transitions. [2021-03-10 23:15:53,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2799 transitions. [2021-03-10 23:15:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:15:53,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:53,134 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:53,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-03-10 23:15:53,334 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1214642723, now seen corresponding path program 168 times [2021-03-10 23:15:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:53,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768712968] [2021-03-10 23:15:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:54,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768712968] [2021-03-10 23:15:54,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536035922] [2021-03-10 23:15:54,894 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:54,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:15:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:54,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:15:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:15:56,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:56,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:56,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:56,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:15:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:15:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643681492] [2021-03-10 23:15:57,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:57,143 INFO L87 Difference]: Start difference. First operand 1396 states and 2799 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:01,233 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 23:16:01,822 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-10 23:16:02,131 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-10 23:16:03,330 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:16:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:04,330 INFO L93 Difference]: Finished difference Result 1547 states and 3078 transitions. [2021-03-10 23:16:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:16:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:16:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:04,335 INFO L225 Difference]: With dead ends: 1547 [2021-03-10 23:16:04,335 INFO L226 Difference]: Without dead ends: 1499 [2021-03-10 23:16:04,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 5950.6ms TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:16:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-03-10 23:16:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1397. [2021-03-10 23:16:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.0064469914040113) internal successors, (2801), 1396 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 2801 transitions. [2021-03-10 23:16:04,346 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 2801 transitions. Word has length 40 [2021-03-10 23:16:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:04,346 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 2801 transitions. [2021-03-10 23:16:04,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 2801 transitions. [2021-03-10 23:16:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:16:04,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:04,347 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:04,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-03-10 23:16:04,548 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash 170979867, now seen corresponding path program 169 times [2021-03-10 23:16:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510775501] [2021-03-10 23:16:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:06,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510775501] [2021-03-10 23:16:06,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177832123] [2021-03-10 23:16:06,191 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:06,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:16:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:07,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:07,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:07,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:16:07,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:07,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:07,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:07,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:16:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:08,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:08,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:16:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794768138] [2021-03-10 23:16:08,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:16:08,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:16:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:08,536 INFO L87 Difference]: Start difference. First operand 1397 states and 2801 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:12,068 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:16:12,489 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:16:13,306 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 23:16:15,101 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 23:16:15,501 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 23:16:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:16,803 INFO L93 Difference]: Finished difference Result 1590 states and 3167 transitions. [2021-03-10 23:16:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:16:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:16:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:16,809 INFO L225 Difference]: With dead ends: 1590 [2021-03-10 23:16:16,809 INFO L226 Difference]: Without dead ends: 1542 [2021-03-10 23:16:16,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 6850.3ms TimeCoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:16:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-03-10 23:16:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1401. [2021-03-10 23:16:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.0064285714285712) internal successors, (2809), 1400 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 2809 transitions. [2021-03-10 23:16:16,839 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 2809 transitions. Word has length 40 [2021-03-10 23:16:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:16,839 INFO L480 AbstractCegarLoop]: Abstraction has 1401 states and 2809 transitions. [2021-03-10 23:16:16,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 2809 transitions. [2021-03-10 23:16:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:16:16,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:16,840 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:17,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:17,055 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash -470130723, now seen corresponding path program 170 times [2021-03-10 23:16:17,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:17,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334809023] [2021-03-10 23:16:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:18,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334809023] [2021-03-10 23:16:18,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617209939] [2021-03-10 23:16:18,660 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:18,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:16:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:18,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:16:18,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:20,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:20,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:20,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:16:20,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:20,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:20,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:20,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:16:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:21,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:21,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:16:21,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675941441] [2021-03-10 23:16:21,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:16:21,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:16:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:21,063 INFO L87 Difference]: Start difference. First operand 1401 states and 2809 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:24,333 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:16:26,046 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:16:26,873 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 23:16:27,338 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 23:16:28,873 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:16:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:30,526 INFO L93 Difference]: Finished difference Result 1590 states and 3168 transitions. [2021-03-10 23:16:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:16:30,530 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:16:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:30,531 INFO L225 Difference]: With dead ends: 1590 [2021-03-10 23:16:30,531 INFO L226 Difference]: Without dead ends: 1558 [2021-03-10 23:16:30,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 6623.2ms TimeCoverageRelationStatistics Valid=318, Invalid=3588, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:16:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-03-10 23:16:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1402. [2021-03-10 23:16:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.006423982869379) internal successors, (2811), 1401 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2811 transitions. [2021-03-10 23:16:30,542 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2811 transitions. Word has length 40 [2021-03-10 23:16:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:30,542 INFO L480 AbstractCegarLoop]: Abstraction has 1402 states and 2811 transitions. [2021-03-10 23:16:30,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2811 transitions. [2021-03-10 23:16:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:16:30,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:30,543 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:30,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:30,743 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash 956111643, now seen corresponding path program 171 times [2021-03-10 23:16:30,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:30,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057188939] [2021-03-10 23:16:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:32,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057188939] [2021-03-10 23:16:32,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502464981] [2021-03-10 23:16:32,399 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:32,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:16:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:16:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:33,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:33,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:33,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:33,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:33,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-03-10 23:16:33,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:33,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:33,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:33,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-03-10 23:16:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:34,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:34,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:16:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065868429] [2021-03-10 23:16:34,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:16:34,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:16:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:34,684 INFO L87 Difference]: Start difference. First operand 1402 states and 2811 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:38,970 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:16:39,450 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:16:40,328 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 23:16:41,673 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:16:42,430 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:16:42,896 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:16:43,468 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:16:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:46,251 INFO L93 Difference]: Finished difference Result 1634 states and 3255 transitions. [2021-03-10 23:16:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:16:46,255 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:16:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:46,257 INFO L225 Difference]: With dead ends: 1634 [2021-03-10 23:16:46,257 INFO L226 Difference]: Without dead ends: 1590 [2021-03-10 23:16:46,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 7840.9ms TimeCoverageRelationStatistics Valid=382, Invalid=4448, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:16:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-03-10 23:16:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1397. [2021-03-10 23:16:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.0064469914040113) internal successors, (2801), 1396 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 2801 transitions. [2021-03-10 23:16:46,269 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 2801 transitions. Word has length 40 [2021-03-10 23:16:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:46,269 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 2801 transitions. [2021-03-10 23:16:46,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 2801 transitions. [2021-03-10 23:16:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:16:46,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:46,270 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:46,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:46,470 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash 931216087, now seen corresponding path program 172 times [2021-03-10 23:16:46,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596084889] [2021-03-10 23:16:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:48,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596084889] [2021-03-10 23:16:48,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777760399] [2021-03-10 23:16:48,240 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:48,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:16:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:48,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:16:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:49,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:16:49,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:49,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:49,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:49,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-03-10 23:16:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:50,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:50,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:16:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407539978] [2021-03-10 23:16:50,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:16:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:16:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:50,820 INFO L87 Difference]: Start difference. First operand 1397 states and 2801 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:53,715 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:16:54,765 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:16:55,102 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 23:16:55,656 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:16:56,323 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:16:56,642 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 23:16:57,273 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:16:57,509 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:16:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:58,884 INFO L93 Difference]: Finished difference Result 1533 states and 3054 transitions. [2021-03-10 23:16:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:16:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:16:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:58,890 INFO L225 Difference]: With dead ends: 1533 [2021-03-10 23:16:58,890 INFO L226 Difference]: Without dead ends: 1505 [2021-03-10 23:16:58,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 6822.8ms TimeCoverageRelationStatistics Valid=257, Invalid=3165, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:16:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-03-10 23:16:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1388. [2021-03-10 23:16:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.0064888248017305) internal successors, (2783), 1387 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2783 transitions. [2021-03-10 23:16:58,901 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2783 transitions. Word has length 40 [2021-03-10 23:16:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:58,901 INFO L480 AbstractCegarLoop]: Abstraction has 1388 states and 2783 transitions. [2021-03-10 23:16:58,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2783 transitions. [2021-03-10 23:16:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:16:58,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:58,902 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:59,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-10 23:16:59,102 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1074502817, now seen corresponding path program 173 times [2021-03-10 23:16:59,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:59,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776959495] [2021-03-10 23:16:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:01,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776959495] [2021-03-10 23:17:01,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611657803] [2021-03-10 23:17:01,069 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:01,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:17:01,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:17:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:03,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:03,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:03,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:03,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:03,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:03,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-03-10 23:17:03,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:03,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:03,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:03,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-03-10 23:17:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:03,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:03,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:17:03,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190707099] [2021-03-10 23:17:03,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:17:03,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:03,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:17:03,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:17:03,926 INFO L87 Difference]: Start difference. First operand 1388 states and 2783 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:09,387 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:17:09,666 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:17:10,100 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:17:10,396 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 23:17:11,098 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 23:17:11,738 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:17:13,293 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:17:13,685 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:17:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:15,218 INFO L93 Difference]: Finished difference Result 1553 states and 3089 transitions. [2021-03-10 23:17:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:17:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:17:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:15,225 INFO L225 Difference]: With dead ends: 1553 [2021-03-10 23:17:15,225 INFO L226 Difference]: Without dead ends: 1493 [2021-03-10 23:17:15,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 7722.3ms TimeCoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:17:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-03-10 23:17:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1397. [2021-03-10 23:17:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.0064469914040113) internal successors, (2801), 1396 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 2801 transitions. [2021-03-10 23:17:15,236 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 2801 transitions. Word has length 40 [2021-03-10 23:17:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:15,237 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 2801 transitions. [2021-03-10 23:17:15,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 2801 transitions. [2021-03-10 23:17:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:17:15,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:15,238 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:15,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-03-10 23:17:15,438 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1746067423, now seen corresponding path program 174 times [2021-03-10 23:17:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:15,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984206161] [2021-03-10 23:17:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:17,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984206161] [2021-03-10 23:17:17,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524529869] [2021-03-10 23:17:17,391 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:17,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:17:17,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:17,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:17:17,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-03-10 23:17:19,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:19,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:19,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:19,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-03-10 23:17:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:20,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:20,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-03-10 23:17:20,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419113925] [2021-03-10 23:17:20,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:17:20,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:20,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:17:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:17:20,338 INFO L87 Difference]: Start difference. First operand 1397 states and 2801 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:25,625 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:17:26,177 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:17:26,450 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:17:26,967 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:17:27,256 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:17:27,983 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 Received shutdown request... [2021-03-10 23:17:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:17:28,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 23:17:28,723 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:17:28,727 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:17:28,727 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:17:28 BasicIcfg [2021-03-10 23:17:28,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:17:28,727 INFO L168 Benchmark]: Toolchain (without parser) took 837040.86 ms. Allocated memory was 255.9 MB in the beginning and 453.0 MB in the end (delta: 197.1 MB). Free memory was 236.7 MB in the beginning and 200.9 MB in the end (delta: 35.8 MB). Peak memory consumption was 232.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:17:28,727 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:17:28,727 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.68 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:17:28,727 INFO L168 Benchmark]: Boogie Preprocessor took 10.26 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 975.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:17:28,728 INFO L168 Benchmark]: RCFGBuilder took 191.58 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 237.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.0 GB. [2021-03-10 23:17:28,728 INFO L168 Benchmark]: TraceAbstraction took 836813.70 ms. Allocated memory was 255.9 MB in the beginning and 453.0 MB in the end (delta: 197.1 MB). Free memory was 237.0 MB in the beginning and 200.9 MB in the end (delta: 36.0 MB). Peak memory consumption was 231.7 MB. Max. memory is 16.0 GB. [2021-03-10 23:17:28,728 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.68 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.26 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 975.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 191.58 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 237.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 836813.70 ms. Allocated memory was 255.9 MB in the beginning and 453.0 MB in the end (delta: 197.1 MB). Free memory was 237.0 MB in the beginning and 200.9 MB in the end (delta: 36.0 MB). Peak memory consumption was 231.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 60). Cancelled while BasicCegarLoop was constructing difference of abstraction (1397states) and FLOYD_HOARE automaton (currently 29 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 836698.8ms, OverallIterations: 178, TraceHistogramMax: 4, EmptinessCheckTime: 175.7ms, AutomataDifference: 563676.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9090 SDtfs, 26974 SDslu, 123723 SDs, 0 SdLazy, 262035 SolverSat, 12237 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118649.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13954 GetRequests, 3492 SyntacticMatches, 489 SemanticMatches, 9973 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174044 ImplicationChecksByTransitivity, 456681.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1988occurred in iteration=136, InterpolantAutomatonStates: 7265, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1734.4ms AutomataMinimizationTime, 177 MinimizatonAttempts, 28189 StatesRemovedByMinimization, 176 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 555.0ms SsaConstructionTime, 1796.7ms SatisfiabilityAnalysisTime, 230063.4ms InterpolantComputationTime, 11719 NumberOfCodeBlocks, 11719 NumberOfCodeBlocksAsserted, 572 NumberOfCheckSat, 11365 ConstructedInterpolants, 748 QuantifiedInterpolants, 189058 SizeOfPredicates, 1528 NumberOfNonLiveVariables, 12919 ConjunctsInSsa, 5946 ConjunctsInUnsatCore, 354 InterpolantComputations, 2 PerfectInterpolantSequences, 100/7629 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