/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:49:33,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:49:33,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:49:33,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:49:33,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:49:33,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:49:33,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:49:33,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:49:33,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:49:33,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:49:33,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:49:33,377 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:49:33,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:49:33,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:49:33,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:49:33,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:49:33,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:49:33,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:49:33,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:49:33,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:49:33,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:49:33,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:49:33,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:49:33,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:49:33,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:49:33,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:49:33,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:49:33,380 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:49:33,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:49:33,380 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:49:33,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:49:33,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:49:33,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:49:33,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:49:33,661 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:49:33,662 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:49:33,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-05-22 02:49:33,663 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-05-22 02:49:33,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:49:33,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:49:33,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:33,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:49:33,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:49:33,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:33,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:49:33,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:49:33,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:49:33,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/1) ... [2021-05-22 02:49:33,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:49:33,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:49:33,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:49:33,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:49:33,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (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 [2021-05-22 02:49:33,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:49:33,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:49:33,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:49:33,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:49:33,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:49:33,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:49:33,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:49:33,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:49:33,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:49:33,838 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:49:33,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:49:33,981 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:49:33,982 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:33 BoogieIcfgContainer [2021-05-22 02:49:33,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:49:33,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:49:33,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:49:33,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:49:33,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:33" (1/2) ... [2021-05-22 02:49:33,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a121361 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:49:33, skipping insertion in model container [2021-05-22 02:49:33,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:33" (2/2) ... [2021-05-22 02:49:33,989 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-05-22 02:49:33,993 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:49:33,993 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:49:33,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:49:33,995 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:49:34,018 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:49:34,037 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:49:34,054 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:49:34,054 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:49:34,054 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:49:34,054 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:49:34,054 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:49:34,054 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:49:34,055 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:49:34,055 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:49:34,062 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-05-22 02:49:34,084 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-05-22 02:49:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-05-22 02:49:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:49:34,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:34,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:34,092 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:34,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-05-22 02:49:34,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:34,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019551146] [2021-05-22 02:49:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:34,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019551146] [2021-05-22 02:49:34,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019551146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:34,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:34,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:49:34,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721042790] [2021-05-22 02:49:34,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:49:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:49:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:34,219 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:34,238 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-05-22 02:49:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:49:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:49:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:34,247 INFO L225 Difference]: With dead ends: 57 [2021-05-22 02:49:34,247 INFO L226 Difference]: Without dead ends: 50 [2021-05-22 02:49:34,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-22 02:49:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-05-22 02:49:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-05-22 02:49:34,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-05-22 02:49:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:34,276 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-05-22 02:49:34,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-05-22 02:49:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:49:34,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:34,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:34,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:49:34,278 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:34,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-05-22 02:49:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:34,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340844909] [2021-05-22 02:49:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:34,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340844909] [2021-05-22 02:49:34,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340844909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638434634] [2021-05-22 02:49:34,353 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 [2021-05-22 02:49:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:49:34,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638434634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:34,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:34,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-22 02:49:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341304599] [2021-05-22 02:49:34,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:49:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:49:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:49:34,625 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:34,788 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-05-22 02:49:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:49:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:49:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:34,794 INFO L225 Difference]: With dead ends: 68 [2021-05-22 02:49:34,794 INFO L226 Difference]: Without dead ends: 68 [2021-05-22 02:49:34,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:49:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-22 02:49:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-05-22 02:49:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-05-22 02:49:34,815 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-05-22 02:49:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:34,816 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-05-22 02:49:34,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-05-22 02:49:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:49:34,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:34,818 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:35,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-22 02:49:35,042 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-05-22 02:49:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510676618] [2021-05-22 02:49:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:35,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510676618] [2021-05-22 02:49:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510676618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:35,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:35,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:49:35,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823783740] [2021-05-22 02:49:35,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:49:35,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:35,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:49:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:49:35,101 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:35,163 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-05-22 02:49:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:49:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:49:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:35,173 INFO L225 Difference]: With dead ends: 71 [2021-05-22 02:49:35,173 INFO L226 Difference]: Without dead ends: 66 [2021-05-22 02:49:35,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-22 02:49:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-05-22 02:49:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-05-22 02:49:35,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-05-22 02:49:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:35,185 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-05-22 02:49:35,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-05-22 02:49:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:49:35,186 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:35,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:35,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:49:35,186 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-05-22 02:49:35,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:35,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838691056] [2021-05-22 02:49:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:35,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:35,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838691056] [2021-05-22 02:49:35,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838691056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:35,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:35,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:49:35,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911651408] [2021-05-22 02:49:35,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:49:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:35,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:49:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:49:35,270 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:35,324 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-05-22 02:49:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:49:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:49:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:35,329 INFO L225 Difference]: With dead ends: 51 [2021-05-22 02:49:35,329 INFO L226 Difference]: Without dead ends: 51 [2021-05-22 02:49:35,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-22 02:49:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-05-22 02:49:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-05-22 02:49:35,341 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-05-22 02:49:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:35,342 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-05-22 02:49:35,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-05-22 02:49:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:49:35,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:35,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:35,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:49:35,344 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-05-22 02:49:35,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:35,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003612183] [2021-05-22 02:49:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:35,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:35,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003612183] [2021-05-22 02:49:35,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003612183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:35,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:35,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:49:35,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575791477] [2021-05-22 02:49:35,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:49:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:49:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:49:35,455 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:35,514 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-05-22 02:49:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:49:35,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:49:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:35,515 INFO L225 Difference]: With dead ends: 51 [2021-05-22 02:49:35,515 INFO L226 Difference]: Without dead ends: 49 [2021-05-22 02:49:35,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:49:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-22 02:49:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-05-22 02:49:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-05-22 02:49:35,523 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-05-22 02:49:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:35,523 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-05-22 02:49:35,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-05-22 02:49:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:49:35,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:35,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:35,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:49:35,525 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-05-22 02:49:35,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:35,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628066584] [2021-05-22 02:49:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:35,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:35,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628066584] [2021-05-22 02:49:35,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628066584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:35,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774122039] [2021-05-22 02:49:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:49:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:35,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:35,923 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 19 treesize of output 7 [2021-05-22 02:49:35,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:35,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:35,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:35,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-05-22 02:49:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:35,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774122039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:35,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:35,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-22 02:49:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81152109] [2021-05-22 02:49:35,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:49:35,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:49:35,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:35,980 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:36,062 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-05-22 02:49:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:49:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:49:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:36,064 INFO L225 Difference]: With dead ends: 86 [2021-05-22 02:49:36,064 INFO L226 Difference]: Without dead ends: 79 [2021-05-22 02:49:36,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-22 02:49:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-05-22 02:49:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-05-22 02:49:36,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-05-22 02:49:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:36,077 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-05-22 02:49:36,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-05-22 02:49:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:49:36,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:36,078 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:36,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:36,279 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-05-22 02:49:36,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:36,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100511358] [2021-05-22 02:49:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:36,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100511358] [2021-05-22 02:49:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100511358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956453335] [2021-05-22 02:49:36,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:36,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:36,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:49:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:36,472 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 19 treesize of output 7 [2021-05-22 02:49:36,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:36,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:36,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:36,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-05-22 02:49:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:36,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956453335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:36,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:36,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-22 02:49:36,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099186673] [2021-05-22 02:49:36,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:49:36,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:49:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:36,511 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:36,556 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-05-22 02:49:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:49:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:49:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:36,557 INFO L225 Difference]: With dead ends: 94 [2021-05-22 02:49:36,557 INFO L226 Difference]: Without dead ends: 87 [2021-05-22 02:49:36,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-22 02:49:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-05-22 02:49:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-05-22 02:49:36,561 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-05-22 02:49:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:36,562 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-05-22 02:49:36,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-05-22 02:49:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:36,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:36,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:36,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:36,785 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-05-22 02:49:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:36,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456790745] [2021-05-22 02:49:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:36,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:36,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456790745] [2021-05-22 02:49:36,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456790745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:36,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987509860] [2021-05-22 02:49:36,882 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 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 [2021-05-22 02:49:36,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:49:36,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:36,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:37,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987509860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:37,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:37,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-22 02:49:37,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706883525] [2021-05-22 02:49:37,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:49:37,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:49:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:49:37,048 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:37,373 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-05-22 02:49:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:49:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:37,376 INFO L225 Difference]: With dead ends: 176 [2021-05-22 02:49:37,376 INFO L226 Difference]: Without dead ends: 176 [2021-05-22 02:49:37,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:49:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-22 02:49:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-05-22 02:49:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-05-22 02:49:37,388 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-05-22 02:49:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:37,388 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-05-22 02:49:37,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-05-22 02:49:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:37,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:37,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:37,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:37,612 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-05-22 02:49:37,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:37,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956816502] [2021-05-22 02:49:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:37,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:37,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956816502] [2021-05-22 02:49:37,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956816502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:37,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876791110] [2021-05-22 02:49:37,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:37,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:37,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:37,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876791110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:37,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:37,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-22 02:49:37,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576028244] [2021-05-22 02:49:37,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:37,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:37,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:37,795 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:38,106 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-05-22 02:49:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:49:38,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:38,108 INFO L225 Difference]: With dead ends: 219 [2021-05-22 02:49:38,108 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:49:38,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:49:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:49:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-05-22 02:49:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-05-22 02:49:38,113 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-05-22 02:49:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:38,113 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-05-22 02:49:38,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-05-22 02:49:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:38,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:38,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:38,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:38,336 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-05-22 02:49:38,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:38,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314382933] [2021-05-22 02:49:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:38,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314382933] [2021-05-22 02:49:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314382933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625420114] [2021-05-22 02:49:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:38,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:49:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:38,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625420114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:38,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:38,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:49:38,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959820887] [2021-05-22 02:49:38,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:49:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:49:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:49:38,537 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:38,824 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-05-22 02:49:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:49:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:38,826 INFO L225 Difference]: With dead ends: 208 [2021-05-22 02:49:38,826 INFO L226 Difference]: Without dead ends: 208 [2021-05-22 02:49:38,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:49:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-22 02:49:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-05-22 02:49:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-05-22 02:49:38,831 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-05-22 02:49:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:38,831 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-05-22 02:49:38,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-05-22 02:49:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:38,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:38,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:39,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:39,054 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-05-22 02:49:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:39,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295563882] [2021-05-22 02:49:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:39,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:39,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295563882] [2021-05-22 02:49:39,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295563882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:39,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168877272] [2021-05-22 02:49:39,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:39,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:49:39,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:39,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:39,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:39,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168877272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:39,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:39,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:49:39,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796332236] [2021-05-22 02:49:39,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:49:39,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:49:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:49:39,252 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:39,547 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-05-22 02:49:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:49:39,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:39,549 INFO L225 Difference]: With dead ends: 205 [2021-05-22 02:49:39,549 INFO L226 Difference]: Without dead ends: 203 [2021-05-22 02:49:39,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:49:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-22 02:49:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-05-22 02:49:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-05-22 02:49:39,554 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-05-22 02:49:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:39,554 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-05-22 02:49:39,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-05-22 02:49:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:39,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:39,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:39,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:39,777 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-05-22 02:49:39,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:39,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341376766] [2021-05-22 02:49:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:39,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:39,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341376766] [2021-05-22 02:49:39,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341376766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:39,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353303604] [2021-05-22 02:49:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:39,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:39,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:39,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353303604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:39,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:39,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-22 02:49:39,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584393148] [2021-05-22 02:49:39,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:39,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:39,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:39,959 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:40,254 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-05-22 02:49:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:49:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:40,256 INFO L225 Difference]: With dead ends: 300 [2021-05-22 02:49:40,256 INFO L226 Difference]: Without dead ends: 300 [2021-05-22 02:49:40,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:49:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-22 02:49:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-05-22 02:49:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-05-22 02:49:40,263 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-05-22 02:49:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:40,264 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-05-22 02:49:40,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-05-22 02:49:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:40,264 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:40,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:40,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-22 02:49:40,487 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-05-22 02:49:40,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:40,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641184192] [2021-05-22 02:49:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:40,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641184192] [2021-05-22 02:49:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641184192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432900986] [2021-05-22 02:49:40,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:40,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:40,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432900986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:40,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:40,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:49:40,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231872428] [2021-05-22 02:49:40,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:49:40,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:49:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:49:40,663 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:40,888 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-05-22 02:49:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:49:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:40,890 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:49:40,890 INFO L226 Difference]: Without dead ends: 235 [2021-05-22 02:49:40,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:49:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-22 02:49:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-05-22 02:49:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-05-22 02:49:40,895 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-05-22 02:49:40,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:40,896 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-05-22 02:49:40,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-05-22 02:49:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:40,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:40,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:41,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:41,113 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-05-22 02:49:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:41,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336627977] [2021-05-22 02:49:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:41,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:41,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336627977] [2021-05-22 02:49:41,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336627977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:41,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884952136] [2021-05-22 02:49:41,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:41,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:49:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884952136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:41,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:41,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:49:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128791979] [2021-05-22 02:49:41,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:49:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:49:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:49:41,287 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:41,528 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-05-22 02:49:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:49:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:41,530 INFO L225 Difference]: With dead ends: 302 [2021-05-22 02:49:41,530 INFO L226 Difference]: Without dead ends: 300 [2021-05-22 02:49:41,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:49:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-22 02:49:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-05-22 02:49:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-05-22 02:49:41,536 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-05-22 02:49:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:41,536 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-05-22 02:49:41,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-05-22 02:49:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:49:41,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:41,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:41,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:41,738 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-05-22 02:49:41,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:41,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502679182] [2021-05-22 02:49:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:41,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502679182] [2021-05-22 02:49:41,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502679182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447375317] [2021-05-22 02:49:41,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:41,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:41,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:41,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447375317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:41,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:41,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-22 02:49:41,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114590701] [2021-05-22 02:49:41,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:41,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:41,894 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:42,173 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-05-22 02:49:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:49:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:49:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:42,175 INFO L225 Difference]: With dead ends: 302 [2021-05-22 02:49:42,175 INFO L226 Difference]: Without dead ends: 296 [2021-05-22 02:49:42,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:49:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-22 02:49:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-05-22 02:49:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-05-22 02:49:42,181 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-05-22 02:49:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:42,181 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-05-22 02:49:42,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-05-22 02:49:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:42,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:42,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:42,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:49:42,397 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-05-22 02:49:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:42,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161178588] [2021-05-22 02:49:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:42,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161178588] [2021-05-22 02:49:42,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161178588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003205062] [2021-05-22 02:49:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:42,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:49:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:42,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:42,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-05-22 02:49:42,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:42,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:42,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:42,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-05-22 02:49:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:42,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003205062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:42,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:42,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:49:42,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508555801] [2021-05-22 02:49:42,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:42,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:42,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:42,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:42,705 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-22 02:49:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:42,835 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-05-22 02:49:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:49:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 22 [2021-05-22 02:49:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:42,836 INFO L225 Difference]: With dead ends: 282 [2021-05-22 02:49:42,836 INFO L226 Difference]: Without dead ends: 257 [2021-05-22 02:49:42,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-22 02:49:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-05-22 02:49:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-05-22 02:49:42,842 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-05-22 02:49:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:42,842 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-05-22 02:49:42,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-22 02:49:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-05-22 02:49:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:42,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:42,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:43,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-22 02:49:43,044 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-05-22 02:49:43,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:43,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768379813] [2021-05-22 02:49:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:43,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768379813] [2021-05-22 02:49:43,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768379813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619701085] [2021-05-22 02:49:43,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:43,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:49:43,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:43,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:43,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-05-22 02:49:43,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:43,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:43,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:43,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-05-22 02:49:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:43,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619701085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:43,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:43,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:49:43,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533031309] [2021-05-22 02:49:43,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:43,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:43,321 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-22 02:49:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:43,440 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-05-22 02:49:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:49:43,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 [2021-05-22 02:49:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:43,442 INFO L225 Difference]: With dead ends: 256 [2021-05-22 02:49:43,442 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:49:43,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:49:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:49:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-05-22 02:49:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-05-22 02:49:43,449 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-05-22 02:49:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:43,449 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-05-22 02:49:43,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-22 02:49:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-05-22 02:49:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:43,449 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:43,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:43,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:49:43,665 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-05-22 02:49:43,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:43,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372506292] [2021-05-22 02:49:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372506292] [2021-05-22 02:49:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372506292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997816786] [2021-05-22 02:49:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:43,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:43,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:43,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-05-22 02:49:43,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:43,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:43,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:43,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-05-22 02:49:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:43,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997816786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:43,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:43,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:49:43,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264301273] [2021-05-22 02:49:43,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:43,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:43,965 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-22 02:49:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:44,104 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-05-22 02:49:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:49:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 22 [2021-05-22 02:49:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:44,106 INFO L225 Difference]: With dead ends: 301 [2021-05-22 02:49:44,106 INFO L226 Difference]: Without dead ends: 278 [2021-05-22 02:49:44,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-22 02:49:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-05-22 02:49:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-05-22 02:49:44,112 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-05-22 02:49:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:44,112 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-05-22 02:49:44,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-22 02:49:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-05-22 02:49:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:44,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:44,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:44,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:44,333 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-05-22 02:49:44,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:44,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452515506] [2021-05-22 02:49:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:44,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:44,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452515506] [2021-05-22 02:49:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452515506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:44,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166626448] [2021-05-22 02:49:44,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:44,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:44,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:44,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-05-22 02:49:44,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:44,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:44,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:44,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-05-22 02:49:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:44,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166626448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:44,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:44,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:49:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095856755] [2021-05-22 02:49:44,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:49:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:49:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:44,594 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-22 02:49:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:44,738 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-05-22 02:49:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:49:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 [2021-05-22 02:49:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:44,740 INFO L225 Difference]: With dead ends: 320 [2021-05-22 02:49:44,740 INFO L226 Difference]: Without dead ends: 313 [2021-05-22 02:49:44,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:49:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-22 02:49:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-05-22 02:49:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-05-22 02:49:44,747 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-05-22 02:49:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:44,747 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-05-22 02:49:44,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-22 02:49:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-05-22 02:49:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:44,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:44,748 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:44,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:44,957 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-05-22 02:49:44,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:44,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743971489] [2021-05-22 02:49:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:45,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:45,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743971489] [2021-05-22 02:49:45,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743971489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:45,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966128696] [2021-05-22 02:49:45,024 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 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 [2021-05-22 02:49:45,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:49:45,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:45,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:45,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966128696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:45,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:45,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-22 02:49:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373853433] [2021-05-22 02:49:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:49:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:49:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:49:45,192 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:45,678 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-05-22 02:49:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:49:45,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:45,680 INFO L225 Difference]: With dead ends: 495 [2021-05-22 02:49:45,680 INFO L226 Difference]: Without dead ends: 495 [2021-05-22 02:49:45,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:49:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-22 02:49:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-05-22 02:49:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-05-22 02:49:45,689 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-05-22 02:49:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:45,689 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-05-22 02:49:45,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-05-22 02:49:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:45,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:45,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:45,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:45,915 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-05-22 02:49:45,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:45,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507019333] [2021-05-22 02:49:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:45,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:45,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507019333] [2021-05-22 02:49:45,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507019333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:45,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832825065] [2021-05-22 02:49:45,985 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 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 [2021-05-22 02:49:46,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:46,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832825065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:46,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:46,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-22 02:49:46,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671586417] [2021-05-22 02:49:46,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:46,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:46,159 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:46,767 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-05-22 02:49:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:49:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:46,770 INFO L225 Difference]: With dead ends: 696 [2021-05-22 02:49:46,770 INFO L226 Difference]: Without dead ends: 652 [2021-05-22 02:49:46,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:49:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-05-22 02:49:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-05-22 02:49:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-05-22 02:49:46,780 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-05-22 02:49:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:46,780 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-05-22 02:49:46,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-05-22 02:49:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:46,781 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:46,781 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:46,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-22 02:49:46,997 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-05-22 02:49:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:46,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837500902] [2021-05-22 02:49:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:47,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:47,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837500902] [2021-05-22 02:49:47,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837500902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:47,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222723646] [2021-05-22 02:49:47,050 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 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 [2021-05-22 02:49:47,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:49:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222723646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:47,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:47,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:49:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251925945] [2021-05-22 02:49:47,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:49:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:49:47,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:49:47,201 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:47,671 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-05-22 02:49:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:49:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:47,674 INFO L225 Difference]: With dead ends: 654 [2021-05-22 02:49:47,674 INFO L226 Difference]: Without dead ends: 652 [2021-05-22 02:49:47,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:49:47,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-05-22 02:49:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-05-22 02:49:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-05-22 02:49:47,695 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-05-22 02:49:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:47,695 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-05-22 02:49:47,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-05-22 02:49:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:47,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:47,696 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:47,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-22 02:49:47,896 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-05-22 02:49:47,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:47,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884934190] [2021-05-22 02:49:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:47,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:47,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884934190] [2021-05-22 02:49:47,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884934190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:47,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695473567] [2021-05-22 02:49:47,944 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 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 [2021-05-22 02:49:47,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:49:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:48,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695473567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:48,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:48,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:49:48,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906491857] [2021-05-22 02:49:48,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:49:48,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:49:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:49:48,099 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:48,494 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-05-22 02:49:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:49:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:48,496 INFO L225 Difference]: With dead ends: 539 [2021-05-22 02:49:48,496 INFO L226 Difference]: Without dead ends: 535 [2021-05-22 02:49:48,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:49:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-22 02:49:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-05-22 02:49:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 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) [2021-05-22 02:49:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-05-22 02:49:48,506 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-05-22 02:49:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:48,506 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-05-22 02:49:48,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-05-22 02:49:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:48,507 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:48,507 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:48,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-22 02:49:48,721 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-05-22 02:49:48,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:48,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676133562] [2021-05-22 02:49:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:48,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:48,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676133562] [2021-05-22 02:49:48,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676133562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:48,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549920930] [2021-05-22 02:49:48,761 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 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 [2021-05-22 02:49:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:48,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549920930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:48,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:48,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:49:48,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332444610] [2021-05-22 02:49:48,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:49:48,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:49:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:49:48,944 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:49,281 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-05-22 02:49:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:49:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:49,284 INFO L225 Difference]: With dead ends: 593 [2021-05-22 02:49:49,284 INFO L226 Difference]: Without dead ends: 584 [2021-05-22 02:49:49,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:49:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-22 02:49:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-05-22 02:49:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-05-22 02:49:49,294 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-05-22 02:49:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:49,294 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-05-22 02:49:49,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-05-22 02:49:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:49,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:49,296 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:49,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-22 02:49:49,520 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-05-22 02:49:49,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:49,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559891528] [2021-05-22 02:49:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:49,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:49,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559891528] [2021-05-22 02:49:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559891528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:49,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413274894] [2021-05-22 02:49:49,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:49,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:49,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:49,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413274894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:49,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:49,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-22 02:49:49,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434124845] [2021-05-22 02:49:49,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:49:49,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:49,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:49:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:49:49,710 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:50,150 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-05-22 02:49:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:49:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:50,153 INFO L225 Difference]: With dead ends: 701 [2021-05-22 02:49:50,153 INFO L226 Difference]: Without dead ends: 687 [2021-05-22 02:49:50,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:49:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-05-22 02:49:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-05-22 02:49:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-05-22 02:49:50,163 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-05-22 02:49:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:50,164 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-05-22 02:49:50,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-05-22 02:49:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:50,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:50,165 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:50,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-22 02:49:50,387 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:50,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-05-22 02:49:50,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:50,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924197475] [2021-05-22 02:49:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:50,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:50,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924197475] [2021-05-22 02:49:50,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924197475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:50,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642398623] [2021-05-22 02:49:50,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:50,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:49:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:50,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642398623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:50,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:50,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-22 02:49:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576004580] [2021-05-22 02:49:50,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:50,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:50,600 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-05-22 02:49:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:51,093 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-05-22 02:49:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:49:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:51,097 INFO L225 Difference]: With dead ends: 817 [2021-05-22 02:49:51,097 INFO L226 Difference]: Without dead ends: 817 [2021-05-22 02:49:51,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 449.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:49:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-05-22 02:49:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-05-22 02:49:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-05-22 02:49:51,109 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-05-22 02:49:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:51,109 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-05-22 02:49:51,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-05-22 02:49:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-05-22 02:49:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:51,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:51,110 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:51,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:51,332 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-05-22 02:49:51,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:51,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125706331] [2021-05-22 02:49:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:51,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:51,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125706331] [2021-05-22 02:49:51,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125706331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:51,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755121677] [2021-05-22 02:49:51,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:51,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:51,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755121677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:51,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:51,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-22 02:49:51,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769762041] [2021-05-22 02:49:51,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:49:51,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:49:51,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:49:51,543 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:51,919 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-05-22 02:49:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:49:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:51,921 INFO L225 Difference]: With dead ends: 578 [2021-05-22 02:49:51,921 INFO L226 Difference]: Without dead ends: 560 [2021-05-22 02:49:51,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:49:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-22 02:49:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-05-22 02:49:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 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) [2021-05-22 02:49:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-05-22 02:49:51,931 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-05-22 02:49:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:51,931 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-05-22 02:49:51,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-05-22 02:49:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:51,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:51,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:52,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-22 02:49:52,149 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-05-22 02:49:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:52,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309528057] [2021-05-22 02:49:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:52,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:52,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309528057] [2021-05-22 02:49:52,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309528057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:52,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931702158] [2021-05-22 02:49:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:52,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:49:52,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:52,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931702158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:52,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:52,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-22 02:49:52,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242071420] [2021-05-22 02:49:52,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:49:52,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:49:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:49:52,360 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:52,847 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-05-22 02:49:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:49:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:52,850 INFO L225 Difference]: With dead ends: 943 [2021-05-22 02:49:52,850 INFO L226 Difference]: Without dead ends: 943 [2021-05-22 02:49:52,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:49:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-05-22 02:49:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-05-22 02:49:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-05-22 02:49:52,864 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-05-22 02:49:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:52,864 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-05-22 02:49:52,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-05-22 02:49:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:52,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:52,865 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:53,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:53,085 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-05-22 02:49:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499872404] [2021-05-22 02:49:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:53,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:53,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499872404] [2021-05-22 02:49:53,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499872404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:53,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938947298] [2021-05-22 02:49:53,128 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 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 [2021-05-22 02:49:53,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:49:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:53,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938947298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:53,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:53,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:49:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518575295] [2021-05-22 02:49:53,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:49:53,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:49:53,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:49:53,280 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:53,635 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-05-22 02:49:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:49:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:53,637 INFO L225 Difference]: With dead ends: 910 [2021-05-22 02:49:53,637 INFO L226 Difference]: Without dead ends: 906 [2021-05-22 02:49:53,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:49:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-05-22 02:49:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-05-22 02:49:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-05-22 02:49:53,652 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-05-22 02:49:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:53,652 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-05-22 02:49:53,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-05-22 02:49:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:53,653 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:53,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:53,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-22 02:49:53,876 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:53,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-05-22 02:49:53,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:53,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043817827] [2021-05-22 02:49:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043817827] [2021-05-22 02:49:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043817827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907363707] [2021-05-22 02:49:53,918 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 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 [2021-05-22 02:49:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:54,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907363707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:54,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:54,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-22 02:49:54,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591474496] [2021-05-22 02:49:54,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:49:54,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:49:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:49:54,053 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:54,430 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-05-22 02:49:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:49:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:54,433 INFO L225 Difference]: With dead ends: 997 [2021-05-22 02:49:54,433 INFO L226 Difference]: Without dead ends: 985 [2021-05-22 02:49:54,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:49:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-05-22 02:49:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-05-22 02:49:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-05-22 02:49:54,447 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-05-22 02:49:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:54,447 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-05-22 02:49:54,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-05-22 02:49:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:54,449 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:54,449 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:54,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:54,661 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-05-22 02:49:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:54,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949997642] [2021-05-22 02:49:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:54,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:54,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949997642] [2021-05-22 02:49:54,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949997642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:54,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675708369] [2021-05-22 02:49:54,715 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 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 [2021-05-22 02:49:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:54,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:54,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675708369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:54,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:54,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-22 02:49:54,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837319943] [2021-05-22 02:49:54,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:54,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:54,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:54,858 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:55,311 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-05-22 02:49:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:49:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-22 02:49:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:55,315 INFO L225 Difference]: With dead ends: 1028 [2021-05-22 02:49:55,315 INFO L226 Difference]: Without dead ends: 1008 [2021-05-22 02:49:55,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:49:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-05-22 02:49:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-05-22 02:49:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-05-22 02:49:55,329 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-05-22 02:49:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:55,329 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-05-22 02:49:55,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-05-22 02:49:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:49:55,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:55,331 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:55,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-22 02:49:55,553 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-05-22 02:49:55,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:55,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812487542] [2021-05-22 02:49:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:55,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:55,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812487542] [2021-05-22 02:49:55,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812487542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:55,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436704486] [2021-05-22 02:49:55,851 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 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 [2021-05-22 02:49:55,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:49:55,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:55,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:49:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:56,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:56,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:56,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-05-22 02:49:56,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-22 02:49:56,512 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-05-22 02:49:56,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-22 02:49:56,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-05-22 02:49:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:56,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436704486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:56,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:56,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-05-22 02:49:56,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503009403] [2021-05-22 02:49:56,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:49:56,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:49:56,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:49:56,592 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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) [2021-05-22 02:49:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:57,809 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-05-22 02:49:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:49:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 26 [2021-05-22 02:49:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:57,812 INFO L225 Difference]: With dead ends: 1044 [2021-05-22 02:49:57,812 INFO L226 Difference]: Without dead ends: 1030 [2021-05-22 02:49:57,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:49:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-05-22 02:49:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-05-22 02:49:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-05-22 02:49:57,826 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-05-22 02:49:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:57,826 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-05-22 02:49:57,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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) [2021-05-22 02:49:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-05-22 02:49:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:49:57,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:57,828 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:58,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:58,049 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-05-22 02:49:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:58,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8317209] [2021-05-22 02:49:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:58,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:58,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8317209] [2021-05-22 02:49:58,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8317209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:58,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410728313] [2021-05-22 02:49:58,314 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 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 [2021-05-22 02:49:58,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:58,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:49:58,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:58,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:49:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:49:58,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:49:58,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:49:58,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:49:58,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:49:58,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:49:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:58,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410728313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:58,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:58,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-22 02:49:58,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752154367] [2021-05-22 02:49:58,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:49:58,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:58,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:49:58,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:49:58,619 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-22 02:49:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:59,648 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-05-22 02:49:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:49:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 26 [2021-05-22 02:49:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:59,651 INFO L225 Difference]: With dead ends: 1114 [2021-05-22 02:49:59,651 INFO L226 Difference]: Without dead ends: 1066 [2021-05-22 02:49:59,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1056.3ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:49:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-05-22 02:49:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-05-22 02:49:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-05-22 02:49:59,665 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-05-22 02:49:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:59,665 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-05-22 02:49:59,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-22 02:49:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-05-22 02:49:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:49:59,667 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:59,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:59,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-22 02:49:59,889 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-05-22 02:49:59,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:59,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496095893] [2021-05-22 02:49:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:00,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:00,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496095893] [2021-05-22 02:50:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496095893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:00,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293790294] [2021-05-22 02:50:00,150 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 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 [2021-05-22 02:50:00,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:00,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:00,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:00,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:00,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:00,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:00,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:00,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293790294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:00,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:00,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-22 02:50:00,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266938373] [2021-05-22 02:50:00,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:50:00,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:00,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:50:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:50:00,401 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-22 02:50:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:01,686 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-05-22 02:50:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:50:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 26 [2021-05-22 02:50:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:01,690 INFO L225 Difference]: With dead ends: 1322 [2021-05-22 02:50:01,690 INFO L226 Difference]: Without dead ends: 1313 [2021-05-22 02:50:01,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1281.1ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:50:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-05-22 02:50:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-05-22 02:50:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-05-22 02:50:01,705 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-05-22 02:50:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:01,705 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-05-22 02:50:01,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-22 02:50:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-05-22 02:50:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:01,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:01,707 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:01,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:01,921 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-05-22 02:50:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:01,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851677161] [2021-05-22 02:50:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:02,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851677161] [2021-05-22 02:50:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851677161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968893300] [2021-05-22 02:50:02,172 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:02,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:50:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:02,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:50:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:02,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:02,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:02,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 7 [2021-05-22 02:50:02,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:02,585 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-05-22 02:50:02,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:02,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-05-22 02:50:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968893300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:02,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:02,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-22 02:50:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786167870] [2021-05-22 02:50:02,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:50:02,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:50:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:50:02,606 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:03,522 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-05-22 02:50:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:50:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-22 02:50:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:03,526 INFO L225 Difference]: With dead ends: 1058 [2021-05-22 02:50:03,526 INFO L226 Difference]: Without dead ends: 1026 [2021-05-22 02:50:03,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:50:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-05-22 02:50:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-05-22 02:50:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.5068965517241377) internal successors, (2181), 870 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-05-22 02:50:03,543 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-05-22 02:50:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:03,543 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-05-22 02:50:03,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-05-22 02:50:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:03,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:03,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:03,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:03,761 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-05-22 02:50:03,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:03,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481077901] [2021-05-22 02:50:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:03,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:03,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481077901] [2021-05-22 02:50:03,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481077901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:03,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889377] [2021-05-22 02:50:03,997 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 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 [2021-05-22 02:50:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:04,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:04,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:04,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:04,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:04,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:04,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:04,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:04,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:04,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:04,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:04,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:04,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:04,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-22 02:50:04,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248465482] [2021-05-22 02:50:04,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:04,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:04,283 INFO L87 Difference]: Start difference. First operand 871 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:05,256 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-05-22 02:50:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:50:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-22 02:50:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:05,260 INFO L225 Difference]: With dead ends: 1083 [2021-05-22 02:50:05,260 INFO L226 Difference]: Without dead ends: 1052 [2021-05-22 02:50:05,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 935.5ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:50:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-05-22 02:50:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-05-22 02:50:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.50055617352614) internal successors, (2248), 899 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-05-22 02:50:05,278 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-05-22 02:50:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:05,278 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-05-22 02:50:05,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-05-22 02:50:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:05,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:05,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:05,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-22 02:50:05,480 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:05,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-05-22 02:50:05,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:05,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587287887] [2021-05-22 02:50:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:05,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:05,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587287887] [2021-05-22 02:50:05,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587287887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:05,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772590756] [2021-05-22 02:50:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:05,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:05,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:06,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:06,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:06,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:06,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:06,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:06,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:06,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:06,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:06,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772590756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:06,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:06,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-22 02:50:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510109610] [2021-05-22 02:50:06,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:06,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:06,130 INFO L87 Difference]: Start difference. First operand 900 states and 2248 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-05-22 02:50:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:07,394 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-05-22 02:50:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:50:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-05-22 02:50:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:07,410 INFO L225 Difference]: With dead ends: 1238 [2021-05-22 02:50:07,411 INFO L226 Difference]: Without dead ends: 1186 [2021-05-22 02:50:07,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1262.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:50:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-05-22 02:50:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-05-22 02:50:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.5) internal successors, (2390), 956 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-05-22 02:50:07,431 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-05-22 02:50:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:07,431 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-05-22 02:50:07,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-05-22 02:50:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-05-22 02:50:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:07,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:07,433 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:07,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:07,655 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-05-22 02:50:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:07,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281804633] [2021-05-22 02:50:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:07,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281804633] [2021-05-22 02:50:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281804633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039517863] [2021-05-22 02:50:07,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:08,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:50:08,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:08,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-22 02:50:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:08,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:08,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 47 [2021-05-22 02:50:08,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-22 02:50:08,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:08,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-22 02:50:08,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-05-22 02:50:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:08,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039517863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:08,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:08,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-22 02:50:08,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151900148] [2021-05-22 02:50:08,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:50:08,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:08,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:50:08,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:50:08,435 INFO L87 Difference]: Start difference. First operand 957 states and 2390 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2021-05-22 02:50:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:10,146 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-05-22 02:50:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:50:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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 26 [2021-05-22 02:50:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:10,148 INFO L225 Difference]: With dead ends: 1077 [2021-05-22 02:50:10,148 INFO L226 Difference]: Without dead ends: 1042 [2021-05-22 02:50:10,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1676.7ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:50:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-05-22 02:50:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-05-22 02:50:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.4942886812045693) internal successors, (2402), 963 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-05-22 02:50:10,160 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-05-22 02:50:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:10,160 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-05-22 02:50:10,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2021-05-22 02:50:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-05-22 02:50:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:10,161 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:10,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:10,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-22 02:50:10,383 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-05-22 02:50:10,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:10,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302113135] [2021-05-22 02:50:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:10,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302113135] [2021-05-22 02:50:10,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302113135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291577800] [2021-05-22 02:50:10,620 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 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 [2021-05-22 02:50:10,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:10,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:10,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:10,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:10,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:10,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:10,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:10,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:10,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291577800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:10,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:10,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-22 02:50:10,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749686669] [2021-05-22 02:50:10,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:50:10,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:50:10,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:50:10,882 INFO L87 Difference]: Start difference. First operand 964 states and 2402 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-22 02:50:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:11,866 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-05-22 02:50:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:50:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 26 [2021-05-22 02:50:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:11,869 INFO L225 Difference]: With dead ends: 1320 [2021-05-22 02:50:11,869 INFO L226 Difference]: Without dead ends: 1283 [2021-05-22 02:50:11,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 928.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:50:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-05-22 02:50:11,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-05-22 02:50:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4989939637826963) internal successors, (2484), 994 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-05-22 02:50:11,884 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-05-22 02:50:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:11,884 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-05-22 02:50:11,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-22 02:50:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-05-22 02:50:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:11,885 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:11,885 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:12,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:12,092 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-05-22 02:50:12,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:12,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193219319] [2021-05-22 02:50:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:12,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193219319] [2021-05-22 02:50:12,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193219319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541648905] [2021-05-22 02:50:12,315 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 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 [2021-05-22 02:50:12,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:50:12,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:12,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:12,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:12,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:12,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:12,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:12,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:12,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:12,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541648905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:12,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:12,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-22 02:50:12,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487067897] [2021-05-22 02:50:12,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:12,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:12,564 INFO L87 Difference]: Start difference. First operand 995 states and 2484 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:13,365 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-05-22 02:50:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:50:13,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-22 02:50:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:13,367 INFO L225 Difference]: With dead ends: 1297 [2021-05-22 02:50:13,367 INFO L226 Difference]: Without dead ends: 1263 [2021-05-22 02:50:13,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:50:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-05-22 02:50:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-05-22 02:50:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.513435700575816) internal successors, (2619), 1042 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-05-22 02:50:13,380 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-05-22 02:50:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:13,380 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-05-22 02:50:13,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-05-22 02:50:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:13,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:13,382 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:13,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-22 02:50:13,582 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-05-22 02:50:13,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:13,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827023591] [2021-05-22 02:50:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:13,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:13,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827023591] [2021-05-22 02:50:13,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827023591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:13,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344651183] [2021-05-22 02:50:13,813 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 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 [2021-05-22 02:50:13,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:50:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:13,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:50:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:14,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:14,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:14,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:14,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:14,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-05-22 02:50:14,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-22 02:50:14,227 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-05-22 02:50:14,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:14,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-05-22 02:50:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:14,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344651183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:14,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:14,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-05-22 02:50:14,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983695359] [2021-05-22 02:50:14,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:50:14,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:50:14,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:50:14,357 INFO L87 Difference]: Start difference. First operand 1043 states and 2619 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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) [2021-05-22 02:50:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:16,306 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-05-22 02:50:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:50:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 26 [2021-05-22 02:50:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:16,308 INFO L225 Difference]: With dead ends: 1498 [2021-05-22 02:50:16,308 INFO L226 Difference]: Without dead ends: 1436 [2021-05-22 02:50:16,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2003.8ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:50:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-05-22 02:50:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-05-22 02:50:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.511520737327189) internal successors, (2725), 1085 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-05-22 02:50:16,323 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-05-22 02:50:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:16,323 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-05-22 02:50:16,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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) [2021-05-22 02:50:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-05-22 02:50:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:16,325 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:16,325 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:16,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-22 02:50:16,525 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-05-22 02:50:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:16,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586269919] [2021-05-22 02:50:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:16,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:16,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586269919] [2021-05-22 02:50:16,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586269919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:16,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383188557] [2021-05-22 02:50:16,781 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 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 [2021-05-22 02:50:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:16,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:16,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:16,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:16,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:16,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:16,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:16,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:16,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:17,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383188557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:17,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:17,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-22 02:50:17,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237867357] [2021-05-22 02:50:17,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:17,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:17,024 INFO L87 Difference]: Start difference. First operand 1086 states and 2725 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-05-22 02:50:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:18,173 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-05-22 02:50:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:50:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-05-22 02:50:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:18,175 INFO L225 Difference]: With dead ends: 1318 [2021-05-22 02:50:18,175 INFO L226 Difference]: Without dead ends: 1276 [2021-05-22 02:50:18,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1125.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:50:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-05-22 02:50:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-05-22 02:50:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.5013501350135012) internal successors, (2779), 1111 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) [2021-05-22 02:50:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-05-22 02:50:18,186 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-05-22 02:50:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:18,186 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-05-22 02:50:18,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-05-22 02:50:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-05-22 02:50:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:50:18,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:18,187 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:18,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:18,388 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-05-22 02:50:18,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:18,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147814277] [2021-05-22 02:50:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:18,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:18,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147814277] [2021-05-22 02:50:18,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147814277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:18,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062361532] [2021-05-22 02:50:18,603 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 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 [2021-05-22 02:50:18,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:50:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:18,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:18,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-05-22 02:50:18,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:18,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:18,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:18,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-05-22 02:50:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062361532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:18,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:18,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-22 02:50:18,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099753380] [2021-05-22 02:50:18,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:18,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:18,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:18,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:18,816 INFO L87 Difference]: Start difference. First operand 1112 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-05-22 02:50:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:19,918 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-05-22 02:50:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:50:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-05-22 02:50:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:19,920 INFO L225 Difference]: With dead ends: 1252 [2021-05-22 02:50:19,920 INFO L226 Difference]: Without dead ends: 1245 [2021-05-22 02:50:19,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1053.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:50:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-05-22 02:50:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-05-22 02:50:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.500892857142857) internal successors, (2801), 1120 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) [2021-05-22 02:50:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-05-22 02:50:19,933 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-05-22 02:50:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:19,933 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-05-22 02:50:19,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-05-22 02:50:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-05-22 02:50:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:19,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:19,935 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:20,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:20,140 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-05-22 02:50:20,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:20,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455565971] [2021-05-22 02:50:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:20,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:20,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455565971] [2021-05-22 02:50:20,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455565971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:20,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558231458] [2021-05-22 02:50:20,228 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 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 [2021-05-22 02:50:20,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:50:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:20,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558231458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:20,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:20,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:50:20,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426548901] [2021-05-22 02:50:20,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:50:20,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:50:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:50:20,440 INFO L87 Difference]: Start difference. First operand 1121 states and 2801 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:21,123 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-05-22 02:50:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:50:21,124 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:21,126 INFO L225 Difference]: With dead ends: 1649 [2021-05-22 02:50:21,126 INFO L226 Difference]: Without dead ends: 1649 [2021-05-22 02:50:21,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:50:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-05-22 02:50:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-05-22 02:50:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.503249767873723) internal successors, (2696), 1077 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-05-22 02:50:21,139 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-05-22 02:50:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:21,139 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-05-22 02:50:21,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-05-22 02:50:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:21,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:21,141 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:21,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:21,363 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-05-22 02:50:21,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:21,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235275933] [2021-05-22 02:50:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:21,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235275933] [2021-05-22 02:50:21,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235275933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130969202] [2021-05-22 02:50:21,434 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 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 [2021-05-22 02:50:21,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:21,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:21,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130969202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:21,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:21,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:50:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730291141] [2021-05-22 02:50:21,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:50:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:50:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:50:21,621 INFO L87 Difference]: Start difference. First operand 1078 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-05-22 02:50:22,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:22,545 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-05-22 02:50:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:50:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 28 [2021-05-22 02:50:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:22,547 INFO L225 Difference]: With dead ends: 2079 [2021-05-22 02:50:22,547 INFO L226 Difference]: Without dead ends: 2008 [2021-05-22 02:50:22,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 866.3ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:50:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-05-22 02:50:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-05-22 02:50:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.519904458598726) internal successors, (3165), 1256 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-05-22 02:50:22,571 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-05-22 02:50:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:22,571 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-05-22 02:50:22,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-05-22 02:50:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-05-22 02:50:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:22,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:22,573 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:22,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-22 02:50:22,795 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-05-22 02:50:22,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:22,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336072662] [2021-05-22 02:50:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:22,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336072662] [2021-05-22 02:50:22,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336072662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737066806] [2021-05-22 02:50:22,843 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 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 [2021-05-22 02:50:22,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:22,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:23,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737066806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:23,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:23,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-22 02:50:23,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306537297] [2021-05-22 02:50:23,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:50:23,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:50:23,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:50:23,066 INFO L87 Difference]: Start difference. First operand 1257 states and 3165 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:23,914 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-05-22 02:50:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:50:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:23,918 INFO L225 Difference]: With dead ends: 2322 [2021-05-22 02:50:23,918 INFO L226 Difference]: Without dead ends: 2316 [2021-05-22 02:50:23,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:50:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-05-22 02:50:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-05-22 02:50:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.5372168284789645) internal successors, (3920), 1545 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-05-22 02:50:23,945 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-05-22 02:50:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:23,945 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-05-22 02:50:23,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-05-22 02:50:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:23,947 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:23,948 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:24,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:24,169 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-05-22 02:50:24,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:24,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156199006] [2021-05-22 02:50:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:24,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:24,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156199006] [2021-05-22 02:50:24,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156199006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:24,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713123202] [2021-05-22 02:50:24,215 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:24,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:50:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:24,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713123202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:24,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:24,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-22 02:50:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149871480] [2021-05-22 02:50:24,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:50:24,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:50:24,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:50:24,374 INFO L87 Difference]: Start difference. First operand 1546 states and 3920 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:25,016 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-05-22 02:50:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:50:25,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:25,019 INFO L225 Difference]: With dead ends: 1833 [2021-05-22 02:50:25,019 INFO L226 Difference]: Without dead ends: 1829 [2021-05-22 02:50:25,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:50:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-05-22 02:50:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-05-22 02:50:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 2.5392221489782467) internal successors, (3852), 1517 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-05-22 02:50:25,041 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-05-22 02:50:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:25,041 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-05-22 02:50:25,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-05-22 02:50:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:25,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:25,043 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:25,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:25,266 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-05-22 02:50:25,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:25,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398244503] [2021-05-22 02:50:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:25,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398244503] [2021-05-22 02:50:25,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398244503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715643974] [2021-05-22 02:50:25,314 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 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 [2021-05-22 02:50:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:25,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:25,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715643974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:25,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:25,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-22 02:50:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176353478] [2021-05-22 02:50:25,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:50:25,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:50:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:50:25,520 INFO L87 Difference]: Start difference. First operand 1518 states and 3852 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-05-22 02:50:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:26,022 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-05-22 02:50:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:50:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 28 [2021-05-22 02:50:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:26,032 INFO L225 Difference]: With dead ends: 2126 [2021-05-22 02:50:26,032 INFO L226 Difference]: Without dead ends: 2117 [2021-05-22 02:50:26,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:50:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-05-22 02:50:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-05-22 02:50:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.553020961775586) internal successors, (4141), 1622 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-05-22 02:50:26,060 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-05-22 02:50:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:26,060 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-05-22 02:50:26,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-05-22 02:50:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-05-22 02:50:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:26,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:26,063 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:26,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-22 02:50:26,277 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:26,277 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-05-22 02:50:26,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:26,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293818387] [2021-05-22 02:50:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:26,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:26,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293818387] [2021-05-22 02:50:26,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293818387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:26,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854499631] [2021-05-22 02:50:26,332 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 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 [2021-05-22 02:50:26,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:26,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854499631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:26,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:26,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-05-22 02:50:26,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128710471] [2021-05-22 02:50:26,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:50:26,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:26,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:50:26,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:50:26,522 INFO L87 Difference]: Start difference. First operand 1623 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:27,185 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-05-22 02:50:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:50:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:27,188 INFO L225 Difference]: With dead ends: 2217 [2021-05-22 02:50:27,188 INFO L226 Difference]: Without dead ends: 2207 [2021-05-22 02:50:27,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:50:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-05-22 02:50:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-05-22 02:50:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 2.5635820895522388) internal successors, (4294), 1675 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-05-22 02:50:27,216 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-05-22 02:50:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:27,216 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-05-22 02:50:27,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-05-22 02:50:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:27,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:27,218 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:27,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-22 02:50:27,440 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-05-22 02:50:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:27,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818956489] [2021-05-22 02:50:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:27,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:27,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818956489] [2021-05-22 02:50:27,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818956489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:27,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788189011] [2021-05-22 02:50:27,503 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 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 [2021-05-22 02:50:27,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:50:27,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:27,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788189011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:27,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:27,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-22 02:50:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62280869] [2021-05-22 02:50:27,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:27,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:27,673 INFO L87 Difference]: Start difference. First operand 1676 states and 4294 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:28,330 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-05-22 02:50:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:50:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:28,332 INFO L225 Difference]: With dead ends: 2439 [2021-05-22 02:50:28,332 INFO L226 Difference]: Without dead ends: 2417 [2021-05-22 02:50:28,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:50:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-05-22 02:50:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-05-22 02:50:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.5510331872260488) internal successors, (4074), 1597 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-05-22 02:50:28,359 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-05-22 02:50:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:28,360 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-05-22 02:50:28,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-05-22 02:50:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:28,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:28,362 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:28,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-22 02:50:28,577 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:28,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-05-22 02:50:28,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:28,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954415166] [2021-05-22 02:50:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:28,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:28,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954415166] [2021-05-22 02:50:28,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954415166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:28,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381103959] [2021-05-22 02:50:28,649 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 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 [2021-05-22 02:50:28,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:28,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:28,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:28,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:28,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381103959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:28,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:28,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:50:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214320118] [2021-05-22 02:50:28,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:50:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:50:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:50:28,849 INFO L87 Difference]: Start difference. First operand 1598 states and 4074 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-05-22 02:50:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:29,608 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-05-22 02:50:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:50:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 28 [2021-05-22 02:50:29,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:29,611 INFO L225 Difference]: With dead ends: 2405 [2021-05-22 02:50:29,611 INFO L226 Difference]: Without dead ends: 2405 [2021-05-22 02:50:29,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:50:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-05-22 02:50:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-05-22 02:50:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.5097332372025956) internal successors, (3481), 1387 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-05-22 02:50:29,628 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-05-22 02:50:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:29,629 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-05-22 02:50:29,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-05-22 02:50:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-05-22 02:50:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:29,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:29,630 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:29,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:29,831 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-05-22 02:50:29,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:29,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820281179] [2021-05-22 02:50:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:29,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820281179] [2021-05-22 02:50:29,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820281179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903216250] [2021-05-22 02:50:29,897 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 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 [2021-05-22 02:50:29,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:50:29,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903216250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:30,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:30,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-22 02:50:30,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211524864] [2021-05-22 02:50:30,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:30,113 INFO L87 Difference]: Start difference. First operand 1388 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:30,918 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-05-22 02:50:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:50:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:30,920 INFO L225 Difference]: With dead ends: 1806 [2021-05-22 02:50:30,920 INFO L226 Difference]: Without dead ends: 1767 [2021-05-22 02:50:30,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:50:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-05-22 02:50:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-05-22 02:50:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.495873968492123) internal successors, (3327), 1333 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-05-22 02:50:30,934 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-05-22 02:50:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:30,934 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-05-22 02:50:30,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-05-22 02:50:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:30,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:30,935 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:31,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:31,136 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:31,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-05-22 02:50:31,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:31,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795647612] [2021-05-22 02:50:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:31,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:31,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795647612] [2021-05-22 02:50:31,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795647612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:31,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634099575] [2021-05-22 02:50:31,201 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 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 [2021-05-22 02:50:31,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:50:31,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:31,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634099575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:31,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:31,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-22 02:50:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714534276] [2021-05-22 02:50:31,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:31,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:31,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:31,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:31,409 INFO L87 Difference]: Start difference. First operand 1334 states and 3327 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-22 02:50:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:32,296 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-05-22 02:50:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:50:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 28 [2021-05-22 02:50:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:32,298 INFO L225 Difference]: With dead ends: 2351 [2021-05-22 02:50:32,298 INFO L226 Difference]: Without dead ends: 2351 [2021-05-22 02:50:32,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:50:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-22 02:50:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-05-22 02:50:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4714881780250346) internal successors, (3554), 1438 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-05-22 02:50:32,316 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-05-22 02:50:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:32,316 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-05-22 02:50:32,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-22 02:50:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-05-22 02:50:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:32,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:32,318 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:32,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:32,518 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-05-22 02:50:32,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:32,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559682055] [2021-05-22 02:50:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:32,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:32,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559682055] [2021-05-22 02:50:32,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559682055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:32,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901954736] [2021-05-22 02:50:32,574 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 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 [2021-05-22 02:50:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901954736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:32,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:32,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-05-22 02:50:32,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520869825] [2021-05-22 02:50:32,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:50:32,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:50:32,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:50:32,748 INFO L87 Difference]: Start difference. First operand 1439 states and 3554 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:33,354 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-05-22 02:50:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:50:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:33,356 INFO L225 Difference]: With dead ends: 1783 [2021-05-22 02:50:33,356 INFO L226 Difference]: Without dead ends: 1765 [2021-05-22 02:50:33,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:50:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-05-22 02:50:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-05-22 02:50:33,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.4751531654186523) internal successors, (3636), 1469 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-05-22 02:50:33,371 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-05-22 02:50:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:33,372 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-05-22 02:50:33,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-05-22 02:50:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:33,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:33,373 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:33,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:33,574 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-05-22 02:50:33,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:33,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890585916] [2021-05-22 02:50:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:33,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:33,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890585916] [2021-05-22 02:50:33,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890585916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:33,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365880023] [2021-05-22 02:50:33,654 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:33,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:33,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:33,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:33,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365880023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:33,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:33,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-05-22 02:50:33,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836736956] [2021-05-22 02:50:33,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:50:33,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:50:33,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:50:33,834 INFO L87 Difference]: Start difference. First operand 1470 states and 3636 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:34,668 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-05-22 02:50:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:50:34,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:34,670 INFO L225 Difference]: With dead ends: 2870 [2021-05-22 02:50:34,670 INFO L226 Difference]: Without dead ends: 2870 [2021-05-22 02:50:34,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:50:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-05-22 02:50:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-05-22 02:50:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 2.5527593818984546) internal successors, (5782), 2265 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-05-22 02:50:34,699 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-05-22 02:50:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:34,699 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-05-22 02:50:34,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-05-22 02:50:34,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:34,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:34,701 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:34,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-22 02:50:34,903 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-05-22 02:50:34,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:34,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334243260] [2021-05-22 02:50:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:34,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:34,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334243260] [2021-05-22 02:50:34,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334243260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:34,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50624761] [2021-05-22 02:50:34,949 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:34,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:50:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:34,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:34,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50624761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:35,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:35,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-22 02:50:35,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662363735] [2021-05-22 02:50:35,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:50:35,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:50:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:50:35,126 INFO L87 Difference]: Start difference. First operand 2266 states and 5782 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:35,678 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-05-22 02:50:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:50:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:35,681 INFO L225 Difference]: With dead ends: 2793 [2021-05-22 02:50:35,681 INFO L226 Difference]: Without dead ends: 2789 [2021-05-22 02:50:35,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:50:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-05-22 02:50:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-05-22 02:50:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5502456453774007) internal successors, (5710), 2239 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-05-22 02:50:35,705 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-05-22 02:50:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:35,705 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-05-22 02:50:35,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-05-22 02:50:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:35,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:35,708 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:35,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:35,914 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-05-22 02:50:35,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:35,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492007858] [2021-05-22 02:50:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:35,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492007858] [2021-05-22 02:50:35,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492007858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100171975] [2021-05-22 02:50:35,994 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 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 [2021-05-22 02:50:36,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:36,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100171975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:36,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:36,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-05-22 02:50:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036231020] [2021-05-22 02:50:36,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:50:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:50:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:50:36,162 INFO L87 Difference]: Start difference. First operand 2240 states and 5710 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:36,715 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-05-22 02:50:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:50:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:36,717 INFO L225 Difference]: With dead ends: 2987 [2021-05-22 02:50:36,717 INFO L226 Difference]: Without dead ends: 2975 [2021-05-22 02:50:36,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:50:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-05-22 02:50:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-05-22 02:50:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.5652355147978323) internal successors, (6154), 2399 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-05-22 02:50:36,745 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-05-22 02:50:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:36,745 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-05-22 02:50:36,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-05-22 02:50:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:36,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:36,748 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:36,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-22 02:50:36,964 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-05-22 02:50:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:36,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765702319] [2021-05-22 02:50:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:37,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:37,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765702319] [2021-05-22 02:50:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765702319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:37,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797538784] [2021-05-22 02:50:37,057 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 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 [2021-05-22 02:50:37,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:37,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:37,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797538784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:37,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:37,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-22 02:50:37,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976953131] [2021-05-22 02:50:37,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:50:37,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:50:37,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:50:37,265 INFO L87 Difference]: Start difference. First operand 2400 states and 6154 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:38,014 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-05-22 02:50:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:50:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:38,017 INFO L225 Difference]: With dead ends: 3282 [2021-05-22 02:50:38,017 INFO L226 Difference]: Without dead ends: 3262 [2021-05-22 02:50:38,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:50:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-05-22 02:50:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-05-22 02:50:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.5788271134805787) internal successors, (6772), 2626 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-05-22 02:50:38,058 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-05-22 02:50:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:38,058 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-05-22 02:50:38,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-05-22 02:50:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:50:38,061 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:38,061 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:38,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-22 02:50:38,263 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-05-22 02:50:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:38,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697977530] [2021-05-22 02:50:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:38,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:38,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697977530] [2021-05-22 02:50:38,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697977530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:38,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548477850] [2021-05-22 02:50:38,333 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 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 [2021-05-22 02:50:38,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:50:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:50:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548477850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:38,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:38,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:50:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114237252] [2021-05-22 02:50:38,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:50:38,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:50:38,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:50:38,533 INFO L87 Difference]: Start difference. First operand 2627 states and 6772 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:39,215 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-05-22 02:50:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:50:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:50:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:39,220 INFO L225 Difference]: With dead ends: 3390 [2021-05-22 02:50:39,221 INFO L226 Difference]: Without dead ends: 3362 [2021-05-22 02:50:39,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 658.1ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:50:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-05-22 02:50:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-05-22 02:50:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.5862808145766345) internal successors, (7239), 2799 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-05-22 02:50:39,256 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-05-22 02:50:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:39,256 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-05-22 02:50:39,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-05-22 02:50:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:39,259 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:39,259 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:39,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:39,459 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-05-22 02:50:39,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:39,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052515628] [2021-05-22 02:50:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:39,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:39,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052515628] [2021-05-22 02:50:39,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052515628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:39,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714836939] [2021-05-22 02:50:39,767 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 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 [2021-05-22 02:50:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:39,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:40,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:40,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:40,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:40,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:40,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:40,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:40,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:40,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714836939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:40,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:40,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:50:40,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838652102] [2021-05-22 02:50:40,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:50:40,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:50:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:50:40,133 INFO L87 Difference]: Start difference. First operand 2800 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:41,908 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-05-22 02:50:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:50:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:41,913 INFO L225 Difference]: With dead ends: 3814 [2021-05-22 02:50:41,913 INFO L226 Difference]: Without dead ends: 3807 [2021-05-22 02:50:41,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1619.0ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:50:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-05-22 02:50:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-05-22 02:50:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.5878236529041287) internal successors, (7396), 2858 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-05-22 02:50:41,945 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-05-22 02:50:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:41,945 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-05-22 02:50:41,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-05-22 02:50:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:41,949 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:41,949 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:42,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-22 02:50:42,165 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-05-22 02:50:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:42,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667979318] [2021-05-22 02:50:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:42,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:42,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667979318] [2021-05-22 02:50:42,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667979318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:42,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468458494] [2021-05-22 02:50:42,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:42,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:42,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:42,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:42,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:42,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:42,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:42,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:42,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:42,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:42,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468458494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:42,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:42,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:50:42,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413097199] [2021-05-22 02:50:42,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:50:42,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:50:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:50:42,810 INFO L87 Difference]: Start difference. First operand 2859 states and 7396 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:44,157 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-05-22 02:50:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:50:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:44,161 INFO L225 Difference]: With dead ends: 3790 [2021-05-22 02:50:44,161 INFO L226 Difference]: Without dead ends: 3739 [2021-05-22 02:50:44,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1372.2ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:50:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-05-22 02:50:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-05-22 02:50:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.5774647887323945) internal successors, (7503), 2911 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-05-22 02:50:44,191 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-05-22 02:50:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:44,191 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-05-22 02:50:44,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-05-22 02:50:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:44,193 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:44,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:44,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:44,394 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-05-22 02:50:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786469806] [2021-05-22 02:50:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:44,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:44,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786469806] [2021-05-22 02:50:44,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786469806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:44,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527162713] [2021-05-22 02:50:44,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:44,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:50:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:44,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:50:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:45,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:45,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:45,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:45,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:45,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-05-22 02:50:45,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-05-22 02:50:45,838 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-05-22 02:50:45,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-22 02:50:45,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-05-22 02:50:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:45,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527162713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:45,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:45,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-05-22 02:50:45,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905783801] [2021-05-22 02:50:45,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:50:45,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:50:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:50:45,917 INFO L87 Difference]: Start difference. First operand 2912 states and 7503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:47,726 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-05-22 02:50:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:50:47,727 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:47,730 INFO L225 Difference]: With dead ends: 3918 [2021-05-22 02:50:47,730 INFO L226 Difference]: Without dead ends: 3872 [2021-05-22 02:50:47,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1771.6ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:50:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-05-22 02:50:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-05-22 02:50:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.572250423011844) internal successors, (7601), 2955 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-05-22 02:50:47,762 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-05-22 02:50:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:47,762 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-05-22 02:50:47,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-05-22 02:50:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:47,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:47,765 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:47,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-05-22 02:50:47,965 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-05-22 02:50:47,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:47,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842997258] [2021-05-22 02:50:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:48,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842997258] [2021-05-22 02:50:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842997258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780618088] [2021-05-22 02:50:48,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:48,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:48,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:48,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:48,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:48,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:48,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:48,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:48,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:48,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:48,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:48,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:48,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:48,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780618088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:48,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:48,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:50:48,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811686084] [2021-05-22 02:50:48,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:50:48,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:50:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:50:48,607 INFO L87 Difference]: Start difference. First operand 2956 states and 7601 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:50,096 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-05-22 02:50:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:50:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:50,100 INFO L225 Difference]: With dead ends: 4132 [2021-05-22 02:50:50,100 INFO L226 Difference]: Without dead ends: 4099 [2021-05-22 02:50:50,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1463.6ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:50:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-05-22 02:50:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-05-22 02:50:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 2.5626026947091685) internal successors, (7798), 3043 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-05-22 02:50:50,133 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-05-22 02:50:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:50,133 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-05-22 02:50:50,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-05-22 02:50:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:50,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:50,136 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:50,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:50,336 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-05-22 02:50:50,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:50,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956581503] [2021-05-22 02:50:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:50,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:50,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956581503] [2021-05-22 02:50:50,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956581503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:50,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507510763] [2021-05-22 02:50:50,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:50,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:50:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:50,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:51,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:51,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:51,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:51,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:51,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:51,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:51,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:51,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507510763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:51,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:51,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:50:51,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906764472] [2021-05-22 02:50:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:50:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:50:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:50:51,052 INFO L87 Difference]: Start difference. First operand 3044 states and 7798 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:52,990 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-05-22 02:50:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:50:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:52,994 INFO L225 Difference]: With dead ends: 4375 [2021-05-22 02:50:52,994 INFO L226 Difference]: Without dead ends: 4366 [2021-05-22 02:50:52,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1955.6ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:50:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-05-22 02:50:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-05-22 02:50:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5682114882506526) internal successors, (7869), 3064 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-05-22 02:50:53,031 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-05-22 02:50:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:53,031 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-05-22 02:50:53,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-05-22 02:50:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:53,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:53,035 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:53,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:53,235 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-05-22 02:50:53,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:53,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465149413] [2021-05-22 02:50:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:53,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465149413] [2021-05-22 02:50:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465149413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151521740] [2021-05-22 02:50:53,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:53,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:50:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:53,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:53,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:53,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:53,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:53,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:53,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:53,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:53,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:53,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:53,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:53,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:53,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151521740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:53,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:53,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:50:53,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829949094] [2021-05-22 02:50:53,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:50:53,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:50:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:50:53,818 INFO L87 Difference]: Start difference. First operand 3065 states and 7869 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:55,500 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-05-22 02:50:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:50:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:55,504 INFO L225 Difference]: With dead ends: 4391 [2021-05-22 02:50:55,504 INFO L226 Difference]: Without dead ends: 4352 [2021-05-22 02:50:55,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1505.1ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:50:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-05-22 02:50:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-05-22 02:50:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 2.5580815945188413) internal successors, (8214), 3211 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-05-22 02:50:55,538 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-05-22 02:50:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:55,538 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-05-22 02:50:55,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-05-22 02:50:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:55,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:55,541 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:55,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:55,742 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:55,742 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-05-22 02:50:55,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:55,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284195335] [2021-05-22 02:50:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:50:56,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:56,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284195335] [2021-05-22 02:50:56,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284195335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:56,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825459258] [2021-05-22 02:50:56,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:56,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:56,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:56,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:56,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:56,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:56,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:56,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825459258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:50:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450667797] [2021-05-22 02:50:56,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:50:56,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:50:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:50:56,343 INFO L87 Difference]: Start difference. First operand 3212 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:50:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:57,836 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-05-22 02:50:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:50:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 30 [2021-05-22 02:50:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:57,840 INFO L225 Difference]: With dead ends: 3557 [2021-05-22 02:50:57,840 INFO L226 Difference]: Without dead ends: 3530 [2021-05-22 02:50:57,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1461.1ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:50:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-05-22 02:50:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-05-22 02:50:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.5523721503388788) internal successors, (8285), 3246 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-05-22 02:50:57,869 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-05-22 02:50:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:57,869 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-05-22 02:50:57,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:50:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-05-22 02:50:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:57,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:57,873 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:58,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:58,074 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-05-22 02:50:58,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:58,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255118465] [2021-05-22 02:50:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:58,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:58,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255118465] [2021-05-22 02:50:58,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255118465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:58,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183577081] [2021-05-22 02:50:58,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:58,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:58,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:58,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:50:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:58,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:50:58,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:50:58,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:50:58,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:50:58,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:50:58,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:50:58,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:50:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:58,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183577081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:58,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:58,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:50:58,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523120351] [2021-05-22 02:50:58,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:50:58,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:58,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:50:58,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:50:58,605 INFO L87 Difference]: Start difference. First operand 3247 states and 8285 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:59,951 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-05-22 02:50:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:50:59,951 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:50:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:59,955 INFO L225 Difference]: With dead ends: 4594 [2021-05-22 02:50:59,955 INFO L226 Difference]: Without dead ends: 4561 [2021-05-22 02:50:59,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1374.4ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:50:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-05-22 02:50:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-05-22 02:50:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.5477140227063515) internal successors, (8303), 3259 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-05-22 02:50:59,991 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-05-22 02:50:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:59,992 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-05-22 02:50:59,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-05-22 02:50:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:50:59,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:59,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:00,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:00,195 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-05-22 02:51:00,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:00,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149961676] [2021-05-22 02:51:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:51:00,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:00,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149961676] [2021-05-22 02:51:00,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149961676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:00,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034279707] [2021-05-22 02:51:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:00,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:51:00,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:00,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:51:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:00,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:00,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 151 [2021-05-22 02:51:01,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-22 02:51:01,087 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-05-22 02:51:01,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:01,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-05-22 02:51:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:01,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034279707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:01,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:01,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-05-22 02:51:01,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261170848] [2021-05-22 02:51:01,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:51:01,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:51:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:51:01,222 INFO L87 Difference]: Start difference. First operand 3260 states and 8303 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:04,351 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-05-22 02:51:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:51:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:04,355 INFO L225 Difference]: With dead ends: 4752 [2021-05-22 02:51:04,355 INFO L226 Difference]: Without dead ends: 4721 [2021-05-22 02:51:04,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 2916.3ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-05-22 02:51:04,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-05-22 02:51:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-05-22 02:51:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.5467032967032965) internal successors, (8343), 3276 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-05-22 02:51:04,390 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-05-22 02:51:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:04,390 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-05-22 02:51:04,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-05-22 02:51:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:04,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:04,393 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:04,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-22 02:51:04,593 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-05-22 02:51:04,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:04,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976546665] [2021-05-22 02:51:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:51:04,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:04,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976546665] [2021-05-22 02:51:04,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976546665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:04,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256952360] [2021-05-22 02:51:04,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:04,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:04,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:04,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:04,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:05,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:05,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:05,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:05,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:05,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:05,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256952360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:05,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:05,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:51:05,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88157276] [2021-05-22 02:51:05,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:51:05,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:51:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:51:05,201 INFO L87 Difference]: Start difference. First operand 3277 states and 8343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:06,733 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-05-22 02:51:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:51:06,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:06,737 INFO L225 Difference]: With dead ends: 3751 [2021-05-22 02:51:06,737 INFO L226 Difference]: Without dead ends: 3733 [2021-05-22 02:51:06,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1530.9ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:51:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-05-22 02:51:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-05-22 02:51:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 2.5457326399510554) internal successors, (8322), 3269 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-05-22 02:51:06,782 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-05-22 02:51:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:06,782 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-05-22 02:51:06,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-05-22 02:51:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:06,785 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:06,785 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:07,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-22 02:51:07,008 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-05-22 02:51:07,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:07,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324661678] [2021-05-22 02:51:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:07,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:07,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324661678] [2021-05-22 02:51:07,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324661678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:07,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678661508] [2021-05-22 02:51:07,232 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 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 [2021-05-22 02:51:07,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:51:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:07,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:07,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:07,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:07,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:07,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:07,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:07,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:07,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:07,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:07,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678661508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:07,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:07,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:51:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232988478] [2021-05-22 02:51:07,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:51:07,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:51:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:51:07,616 INFO L87 Difference]: Start difference. First operand 3270 states and 8322 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:08,398 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-05-22 02:51:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:51:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:08,401 INFO L225 Difference]: With dead ends: 3590 [2021-05-22 02:51:08,401 INFO L226 Difference]: Without dead ends: 3563 [2021-05-22 02:51:08,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:51:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-05-22 02:51:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-05-22 02:51:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.5403422982885084) internal successors, (8312), 3272 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-05-22 02:51:08,437 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-05-22 02:51:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:08,438 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-05-22 02:51:08,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-05-22 02:51:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:08,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:08,440 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:08,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:08,641 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-05-22 02:51:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094943189] [2021-05-22 02:51:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:08,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:08,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094943189] [2021-05-22 02:51:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094943189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:08,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663637921] [2021-05-22 02:51:08,951 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 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 [2021-05-22 02:51:08,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:51:08,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:08,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:51:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:09,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:09,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:09,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:09,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-05-22 02:51:09,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-22 02:51:09,495 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-05-22 02:51:09,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:09,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-05-22 02:51:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:09,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663637921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:09,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:09,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-05-22 02:51:09,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916952406] [2021-05-22 02:51:09,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:51:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:09,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:51:09,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:51:09,593 INFO L87 Difference]: Start difference. First operand 3273 states and 8312 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:12,125 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-05-22 02:51:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:51:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:12,129 INFO L225 Difference]: With dead ends: 4934 [2021-05-22 02:51:12,129 INFO L226 Difference]: Without dead ends: 4898 [2021-05-22 02:51:12,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2536.6ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:51:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-05-22 02:51:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-05-22 02:51:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.557738814993954) internal successors, (8461), 3308 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-05-22 02:51:12,189 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-05-22 02:51:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:12,189 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-05-22 02:51:12,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-05-22 02:51:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:12,193 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:12,193 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:12,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:12,406 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:12,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-05-22 02:51:12,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:12,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292913480] [2021-05-22 02:51:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:12,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292913480] [2021-05-22 02:51:12,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292913480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:12,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375035937] [2021-05-22 02:51:12,628 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 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 [2021-05-22 02:51:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:12,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:12,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:12,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:12,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:12,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:12,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:12,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375035937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:12,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:12,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:51:12,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518210389] [2021-05-22 02:51:12,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:51:12,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:51:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:51:12,914 INFO L87 Difference]: Start difference. First operand 3309 states and 8461 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:14,405 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-05-22 02:51:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:51:14,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-05-22 02:51:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:14,409 INFO L225 Difference]: With dead ends: 3897 [2021-05-22 02:51:14,409 INFO L226 Difference]: Without dead ends: 3871 [2021-05-22 02:51:14,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1355.7ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:51:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-05-22 02:51:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-05-22 02:51:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.537699680511182) internal successors, (7943), 3130 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-05-22 02:51:14,442 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-05-22 02:51:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:14,442 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-05-22 02:51:14,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-05-22 02:51:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:14,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:14,444 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:14,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:14,645 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-05-22 02:51:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:14,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462395228] [2021-05-22 02:51:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:14,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462395228] [2021-05-22 02:51:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462395228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217635743] [2021-05-22 02:51:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:14,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:51:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:14,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:15,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:15,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:15,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:15,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:15,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:15,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:15,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:15,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217635743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:15,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:15,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:51:15,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97268964] [2021-05-22 02:51:15,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:51:15,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:15,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:51:15,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:51:15,172 INFO L87 Difference]: Start difference. First operand 3131 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:16,987 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-05-22 02:51:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:51:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-05-22 02:51:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:16,991 INFO L225 Difference]: With dead ends: 3917 [2021-05-22 02:51:16,991 INFO L226 Difference]: Without dead ends: 3891 [2021-05-22 02:51:16,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1533.1ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:51:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-05-22 02:51:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-05-22 02:51:17,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.537174721189591) internal successors, (8190), 3228 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-05-22 02:51:17,024 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-05-22 02:51:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:17,025 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-05-22 02:51:17,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-05-22 02:51:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:17,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:17,027 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:17,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:17,227 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-05-22 02:51:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:17,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953913069] [2021-05-22 02:51:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:17,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953913069] [2021-05-22 02:51:17,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953913069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183650482] [2021-05-22 02:51:17,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:17,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:51:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:17,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:51:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:18,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:18,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:18,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:18,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:18,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:18,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-05-22 02:51:18,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-22 02:51:18,681 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-05-22 02:51:18,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:18,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-05-22 02:51:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183650482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:18,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:18,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-05-22 02:51:18,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703776463] [2021-05-22 02:51:18,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:51:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:51:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:51:18,825 INFO L87 Difference]: Start difference. First operand 3229 states and 8190 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:21,521 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-22 02:51:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:22,202 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-05-22 02:51:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:51:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:22,207 INFO L225 Difference]: With dead ends: 4685 [2021-05-22 02:51:22,208 INFO L226 Difference]: Without dead ends: 4633 [2021-05-22 02:51:22,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3266.1ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:51:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-05-22 02:51:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-05-22 02:51:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 2.553873552983081) internal successors, (8604), 3369 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-05-22 02:51:22,249 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-05-22 02:51:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:22,249 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-05-22 02:51:22,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-05-22 02:51:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:22,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:22,252 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:22,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-05-22 02:51:22,452 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-05-22 02:51:22,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:22,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70845261] [2021-05-22 02:51:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:22,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:22,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70845261] [2021-05-22 02:51:22,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70845261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:22,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400307096] [2021-05-22 02:51:22,698 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 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 [2021-05-22 02:51:22,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:22,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:22,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:22,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:22,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:22,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:22,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:22,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:22,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:22,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400307096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:22,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:22,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:51:22,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974527861] [2021-05-22 02:51:22,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:51:22,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:51:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:51:22,986 INFO L87 Difference]: Start difference. First operand 3370 states and 8604 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:24,162 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-05-22 02:51:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:51:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:24,166 INFO L225 Difference]: With dead ends: 3767 [2021-05-22 02:51:24,166 INFO L226 Difference]: Without dead ends: 3736 [2021-05-22 02:51:24,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1192.5ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:51:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-05-22 02:51:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-05-22 02:51:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.53731778425656) internal successors, (8703), 3430 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-05-22 02:51:24,202 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-05-22 02:51:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:24,202 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-05-22 02:51:24,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-05-22 02:51:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:24,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:24,205 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:24,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-05-22 02:51:24,409 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-05-22 02:51:24,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:24,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893774036] [2021-05-22 02:51:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:24,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893774036] [2021-05-22 02:51:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893774036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477105632] [2021-05-22 02:51:24,708 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 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 [2021-05-22 02:51:24,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:51:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:24,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:25,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:25,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:25,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:25,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:25,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:25,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477105632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:25,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:25,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:51:25,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920585806] [2021-05-22 02:51:25,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:51:25,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:25,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:51:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:51:25,108 INFO L87 Difference]: Start difference. First operand 3431 states and 8703 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:26,543 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-05-22 02:51:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:51:26,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:26,547 INFO L225 Difference]: With dead ends: 4784 [2021-05-22 02:51:26,547 INFO L226 Difference]: Without dead ends: 4733 [2021-05-22 02:51:26,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1424.9ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:51:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-05-22 02:51:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-05-22 02:51:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.5367132867132867) internal successors, (8706), 3432 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-05-22 02:51:26,597 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-05-22 02:51:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:26,597 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-05-22 02:51:26,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-05-22 02:51:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:26,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:26,600 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:26,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:26,800 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-05-22 02:51:26,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:26,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312304685] [2021-05-22 02:51:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:27,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:27,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312304685] [2021-05-22 02:51:27,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312304685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:27,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284826662] [2021-05-22 02:51:27,075 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 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 [2021-05-22 02:51:27,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:51:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:27,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:51:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:27,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:27,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:27,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:27,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:27,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:27,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-05-22 02:51:27,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-22 02:51:27,550 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-05-22 02:51:27,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:27,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-05-22 02:51:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:27,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284826662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:27,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:27,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-05-22 02:51:27,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364985341] [2021-05-22 02:51:27,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:51:27,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:51:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:51:27,652 INFO L87 Difference]: Start difference. First operand 3433 states and 8706 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:30,318 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-05-22 02:51:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 02:51:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:30,322 INFO L225 Difference]: With dead ends: 4909 [2021-05-22 02:51:30,322 INFO L226 Difference]: Without dead ends: 4866 [2021-05-22 02:51:30,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2673.6ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:51:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-05-22 02:51:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-05-22 02:51:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 2.528030930682132) internal successors, (9154), 3621 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-05-22 02:51:30,372 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-05-22 02:51:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:30,372 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-05-22 02:51:30,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-05-22 02:51:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:30,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:30,376 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:30,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:30,578 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-05-22 02:51:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:30,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880340909] [2021-05-22 02:51:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:30,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:30,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880340909] [2021-05-22 02:51:30,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880340909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:30,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183529033] [2021-05-22 02:51:30,794 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 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 [2021-05-22 02:51:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:30,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:31,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:31,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:31,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:31,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:31,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:31,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:31,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:31,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183529033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:31,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:31,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:51:31,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100477757] [2021-05-22 02:51:31,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:51:31,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:51:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:51:31,074 INFO L87 Difference]: Start difference. First operand 3622 states and 9154 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:32,350 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-05-22 02:51:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:51:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:32,354 INFO L225 Difference]: With dead ends: 3927 [2021-05-22 02:51:32,354 INFO L226 Difference]: Without dead ends: 3899 [2021-05-22 02:51:32,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1270.4ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:51:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-05-22 02:51:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-05-22 02:51:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 2.5263445263445266) internal successors, (9254), 3663 states have internal predecessors, (9254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-05-22 02:51:32,387 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-05-22 02:51:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:32,387 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-05-22 02:51:32,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-05-22 02:51:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:32,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:32,390 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:32,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:32,591 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-05-22 02:51:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:32,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015344469] [2021-05-22 02:51:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:32,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:32,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015344469] [2021-05-22 02:51:32,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015344469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:32,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066504550] [2021-05-22 02:51:32,833 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 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 [2021-05-22 02:51:32,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:51:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:32,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:33,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:33,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:33,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:33,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:33,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:33,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:33,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:33,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:33,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066504550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:33,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:33,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:51:33,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434970101] [2021-05-22 02:51:33,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:51:33,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:33,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:51:33,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:51:33,201 INFO L87 Difference]: Start difference. First operand 3664 states and 9254 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:34,101 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-05-22 02:51:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:51:34,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:34,105 INFO L225 Difference]: With dead ends: 4402 [2021-05-22 02:51:34,105 INFO L226 Difference]: Without dead ends: 4365 [2021-05-22 02:51:34,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 921.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:51:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-05-22 02:51:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-05-22 02:51:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.5322997416020674) internal successors, (9800), 3870 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-05-22 02:51:34,152 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-05-22 02:51:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:34,152 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-05-22 02:51:34,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-05-22 02:51:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:34,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:34,156 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:34,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:34,359 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:34,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-05-22 02:51:34,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:34,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431228515] [2021-05-22 02:51:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:34,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:34,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431228515] [2021-05-22 02:51:34,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431228515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:34,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970233359] [2021-05-22 02:51:34,661 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 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 [2021-05-22 02:51:34,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:51:34,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:34,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:51:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:35,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:35,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:35,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 157 [2021-05-22 02:51:35,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-22 02:51:35,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:35,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:35,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-05-22 02:51:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:35,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970233359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:35,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:35,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-05-22 02:51:35,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737767994] [2021-05-22 02:51:35,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:51:35,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:51:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:51:35,344 INFO L87 Difference]: Start difference. First operand 3871 states and 9800 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:37,767 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-05-22 02:51:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:51:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:37,771 INFO L225 Difference]: With dead ends: 4724 [2021-05-22 02:51:37,771 INFO L226 Difference]: Without dead ends: 4685 [2021-05-22 02:51:37,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2387.5ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:51:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-05-22 02:51:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-05-22 02:51:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.524805447470817) internal successors, (10382), 4112 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-05-22 02:51:37,812 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-05-22 02:51:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:37,812 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-05-22 02:51:37,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-05-22 02:51:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:37,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:37,817 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:38,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-05-22 02:51:38,033 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-05-22 02:51:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:38,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966634008] [2021-05-22 02:51:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:38,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966634008] [2021-05-22 02:51:38,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966634008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:38,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011773455] [2021-05-22 02:51:38,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:38,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:38,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:38,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:38,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:38,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:38,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:38,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:38,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:38,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:38,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011773455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:38,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:38,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:51:38,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529875350] [2021-05-22 02:51:38,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:51:38,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:38,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:51:38,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:51:38,607 INFO L87 Difference]: Start difference. First operand 4113 states and 10382 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:51:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:40,487 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-05-22 02:51:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:51:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 30 [2021-05-22 02:51:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:40,492 INFO L225 Difference]: With dead ends: 4964 [2021-05-22 02:51:40,492 INFO L226 Difference]: Without dead ends: 4899 [2021-05-22 02:51:40,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1743.7ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:51:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-05-22 02:51:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-05-22 02:51:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.5202092249167856) internal successors, (10600), 4206 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-05-22 02:51:40,533 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-05-22 02:51:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:40,533 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-05-22 02:51:40,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:51:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-05-22 02:51:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:40,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:40,537 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:40,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-05-22 02:51:40,737 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-05-22 02:51:40,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:40,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696158211] [2021-05-22 02:51:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:41,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696158211] [2021-05-22 02:51:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696158211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055107010] [2021-05-22 02:51:41,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:41,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:51:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:41,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:41,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:41,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:41,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:41,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:41,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:41,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:41,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:41,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:41,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055107010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:41,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:41,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:51:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363766323] [2021-05-22 02:51:41,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:51:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:51:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:51:41,382 INFO L87 Difference]: Start difference. First operand 4207 states and 10600 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:51:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:43,123 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-05-22 02:51:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:51:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 30 [2021-05-22 02:51:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:43,128 INFO L225 Difference]: With dead ends: 4760 [2021-05-22 02:51:43,128 INFO L226 Difference]: Without dead ends: 4720 [2021-05-22 02:51:43,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1618.3ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:51:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-05-22 02:51:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-05-22 02:51:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 2.5155513666352496) internal successors, (10676), 4244 states have internal predecessors, (10676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-05-22 02:51:43,180 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-05-22 02:51:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:43,180 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-05-22 02:51:43,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:51:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-05-22 02:51:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:43,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:43,185 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:43,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-05-22 02:51:43,401 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-05-22 02:51:43,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:43,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044715583] [2021-05-22 02:51:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:43,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:43,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044715583] [2021-05-22 02:51:43,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044715583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:43,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987544131] [2021-05-22 02:51:43,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:43,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:51:43,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:43,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:43,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:43,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:43,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:43,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:43,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:43,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:43,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:43,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987544131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:43,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:43,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:51:43,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546194566] [2021-05-22 02:51:43,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:51:43,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:43,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:51:43,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:51:43,957 INFO L87 Difference]: Start difference. First operand 4245 states and 10676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:45,934 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-05-22 02:51:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:51:45,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-05-22 02:51:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:45,938 INFO L225 Difference]: With dead ends: 4832 [2021-05-22 02:51:45,938 INFO L226 Difference]: Without dead ends: 4777 [2021-05-22 02:51:45,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1785.6ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:51:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-05-22 02:51:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-05-22 02:51:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.5127491886879927) internal successors, (10840), 4314 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-05-22 02:51:45,980 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-05-22 02:51:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:45,980 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-05-22 02:51:45,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-05-22 02:51:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:45,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:45,983 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:46,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:46,184 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:46,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-05-22 02:51:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:46,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483414275] [2021-05-22 02:51:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:46,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483414275] [2021-05-22 02:51:46,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483414275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697033341] [2021-05-22 02:51:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:46,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:46,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:46,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:46,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:46,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:46,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:46,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:46,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:46,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:46,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:46,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697033341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:46,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:46,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:51:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852006305] [2021-05-22 02:51:46,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:51:46,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:46,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:51:46,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:51:46,839 INFO L87 Difference]: Start difference. First operand 4315 states and 10840 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:48,449 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-05-22 02:51:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:51:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:48,455 INFO L225 Difference]: With dead ends: 5809 [2021-05-22 02:51:48,455 INFO L226 Difference]: Without dead ends: 5760 [2021-05-22 02:51:48,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1489.8ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:51:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-05-22 02:51:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-05-22 02:51:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 2.5130002260908886) internal successors, (11115), 4423 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-05-22 02:51:48,501 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-05-22 02:51:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:48,501 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-05-22 02:51:48,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-05-22 02:51:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:48,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:48,505 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:48,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-05-22 02:51:48,705 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-05-22 02:51:48,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:48,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845907531] [2021-05-22 02:51:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:48,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845907531] [2021-05-22 02:51:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845907531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663991679] [2021-05-22 02:51:48,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:51:49,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:51:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:49,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:49,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:49,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:49,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:49,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:49,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:49,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:49,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:49,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663991679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:49,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:49,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:51:49,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129947253] [2021-05-22 02:51:49,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:51:49,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:51:49,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:51:49,323 INFO L87 Difference]: Start difference. First operand 4424 states and 11115 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:50,625 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-05-22 02:51:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:51:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:50,630 INFO L225 Difference]: With dead ends: 5600 [2021-05-22 02:51:50,630 INFO L226 Difference]: Without dead ends: 5549 [2021-05-22 02:51:50,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1328.0ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:51:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-05-22 02:51:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-05-22 02:51:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 2.507372654155496) internal successors, (11223), 4476 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-05-22 02:51:50,676 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-05-22 02:51:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:50,676 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-05-22 02:51:50,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-05-22 02:51:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:50,680 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:50,680 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:50,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:50,881 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-05-22 02:51:50,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:50,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136512618] [2021-05-22 02:51:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:51,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:51,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136512618] [2021-05-22 02:51:51,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136512618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:51,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414898158] [2021-05-22 02:51:51,137 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 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 [2021-05-22 02:51:51,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:51:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:51,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:51:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:51,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:51,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:51,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:51,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:51,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-05-22 02:51:52,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-05-22 02:51:52,337 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-05-22 02:51:52,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:52,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-05-22 02:51:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414898158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:52,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:52,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-05-22 02:51:52,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750028863] [2021-05-22 02:51:52,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:51:52,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:51:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:51:52,456 INFO L87 Difference]: Start difference. First operand 4477 states and 11223 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:55,259 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-05-22 02:51:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:51:55,259 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:51:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:55,264 INFO L225 Difference]: With dead ends: 5628 [2021-05-22 02:51:55,264 INFO L226 Difference]: Without dead ends: 5604 [2021-05-22 02:51:55,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2554.7ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:51:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-05-22 02:51:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-05-22 02:51:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.5064674397859052) internal successors, (11239), 4484 states have internal predecessors, (11239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-05-22 02:51:55,310 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-05-22 02:51:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:55,311 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-05-22 02:51:55,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-05-22 02:51:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:55,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:55,316 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:55,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-05-22 02:51:55,529 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:55,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-05-22 02:51:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:55,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469542199] [2021-05-22 02:51:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:55,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:55,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469542199] [2021-05-22 02:51:55,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469542199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:55,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874184129] [2021-05-22 02:51:55,792 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 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 [2021-05-22 02:51:55,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:55,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:55,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:56,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:56,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:56,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:56,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:56,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:56,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:56,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:56,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874184129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:56,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:56,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:51:56,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205530016] [2021-05-22 02:51:56,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:51:56,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:51:56,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:51:56,061 INFO L87 Difference]: Start difference. First operand 4485 states and 11239 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:57,858 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-05-22 02:51:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:51:57,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-05-22 02:51:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:57,863 INFO L225 Difference]: With dead ends: 5013 [2021-05-22 02:51:57,863 INFO L226 Difference]: Without dead ends: 4984 [2021-05-22 02:51:57,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1689.6ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:51:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-05-22 02:51:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-05-22 02:51:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.4972862957937583) internal successors, (11043), 4422 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-05-22 02:51:57,905 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-05-22 02:51:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:57,905 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-05-22 02:51:57,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:51:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-05-22 02:51:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:51:57,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:57,909 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:58,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:58,114 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:58,114 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-05-22 02:51:58,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:58,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143090322] [2021-05-22 02:51:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:58,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143090322] [2021-05-22 02:51:58,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143090322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188617489] [2021-05-22 02:51:58,377 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 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 [2021-05-22 02:51:58,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:51:58,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:58,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:51:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:58,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:51:58,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:51:58,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:51:58,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:51:58,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:51:58,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:51:58,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:51:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:58,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188617489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:58,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:58,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:51:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489883526] [2021-05-22 02:51:58,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:51:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:51:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:51:58,720 INFO L87 Difference]: Start difference. First operand 4423 states and 11043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:00,034 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-05-22 02:52:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:52:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:52:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:00,039 INFO L225 Difference]: With dead ends: 4995 [2021-05-22 02:52:00,039 INFO L226 Difference]: Without dead ends: 4959 [2021-05-22 02:52:00,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1232.2ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:52:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-05-22 02:52:00,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-05-22 02:52:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.503015941404567) internal successors, (11619), 4642 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-05-22 02:52:00,081 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-05-22 02:52:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:00,081 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-05-22 02:52:00,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-05-22 02:52:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:00,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:00,085 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:00,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-05-22 02:52:00,285 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-05-22 02:52:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:00,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873105101] [2021-05-22 02:52:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:00,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:00,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873105101] [2021-05-22 02:52:00,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873105101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:00,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925369215] [2021-05-22 02:52:00,570 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 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 [2021-05-22 02:52:00,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:52:00,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:00,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:52:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:01,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:01,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-05-22 02:52:01,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-22 02:52:01,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:01,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:01,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-05-22 02:52:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925369215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-05-22 02:52:01,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128276096] [2021-05-22 02:52:01,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:52:01,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:52:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:52:01,250 INFO L87 Difference]: Start difference. First operand 4643 states and 11619 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:03,247 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-05-22 02:52:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:52:03,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:52:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:03,253 INFO L225 Difference]: With dead ends: 5869 [2021-05-22 02:52:03,253 INFO L226 Difference]: Without dead ends: 5852 [2021-05-22 02:52:03,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1772.6ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:52:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-05-22 02:52:03,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-05-22 02:52:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.5053694158075603) internal successors, (11665), 4656 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-05-22 02:52:03,305 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-05-22 02:52:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:03,305 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-05-22 02:52:03,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-05-22 02:52:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:03,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:03,309 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:03,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-05-22 02:52:03,510 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:03,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-05-22 02:52:03,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:03,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143982417] [2021-05-22 02:52:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:03,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143982417] [2021-05-22 02:52:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143982417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:03,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349590733] [2021-05-22 02:52:03,814 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 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 [2021-05-22 02:52:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:03,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:52:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:04,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:04,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:52:04,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:04,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:04,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:04,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:52:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:04,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349590733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:04,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:04,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-22 02:52:04,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403663186] [2021-05-22 02:52:04,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:52:04,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:52:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:52:04,109 INFO L87 Difference]: Start difference. First operand 4657 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:05,342 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-05-22 02:52:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:52:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:52:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:05,348 INFO L225 Difference]: With dead ends: 5656 [2021-05-22 02:52:05,348 INFO L226 Difference]: Without dead ends: 5619 [2021-05-22 02:52:05,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1261.9ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:52:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-05-22 02:52:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-05-22 02:52:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.5057621222004784) internal successors, (11524), 4599 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-05-22 02:52:05,395 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-05-22 02:52:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:05,395 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-05-22 02:52:05,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-05-22 02:52:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:05,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:05,399 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:05,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:05,600 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-05-22 02:52:05,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:05,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061076443] [2021-05-22 02:52:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:05,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061076443] [2021-05-22 02:52:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061076443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100617390] [2021-05-22 02:52:05,854 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 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 [2021-05-22 02:52:05,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:05,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:52:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:06,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:52:06,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:06,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:06,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:06,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:52:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:06,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100617390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:06,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:06,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:52:06,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105848286] [2021-05-22 02:52:06,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:06,143 INFO L87 Difference]: Start difference. First operand 4600 states and 11524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:52:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:07,563 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-05-22 02:52:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:52:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 30 [2021-05-22 02:52:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:07,569 INFO L225 Difference]: With dead ends: 5225 [2021-05-22 02:52:07,569 INFO L226 Difference]: Without dead ends: 5199 [2021-05-22 02:52:07,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1367.6ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:52:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-05-22 02:52:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-05-22 02:52:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5053579082726105) internal successors, (11690), 4666 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-05-22 02:52:07,615 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-05-22 02:52:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:07,615 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-05-22 02:52:07,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:52:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-05-22 02:52:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:07,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:07,619 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:07,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-05-22 02:52:07,819 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:07,819 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-05-22 02:52:07,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:07,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973470977] [2021-05-22 02:52:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:08,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973470977] [2021-05-22 02:52:08,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973470977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45831178] [2021-05-22 02:52:08,093 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 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 [2021-05-22 02:52:08,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:52:08,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:08,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:52:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:08,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:08,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:08,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:08,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 141 [2021-05-22 02:52:08,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-05-22 02:52:08,759 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-05-22 02:52:08,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:08,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-05-22 02:52:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45831178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:08,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:08,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-05-22 02:52:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504158204] [2021-05-22 02:52:08,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:52:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:52:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:52:08,851 INFO L87 Difference]: Start difference. First operand 4667 states and 11690 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:10,806 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-05-22 02:52:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:52:10,807 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:52:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:10,811 INFO L225 Difference]: With dead ends: 5151 [2021-05-22 02:52:10,811 INFO L226 Difference]: Without dead ends: 5117 [2021-05-22 02:52:10,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1996.2ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:52:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-05-22 02:52:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-05-22 02:52:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.507494646680942) internal successors, (11710), 4670 states have internal predecessors, (11710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-05-22 02:52:10,853 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-05-22 02:52:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:10,853 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-05-22 02:52:10,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-05-22 02:52:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:10,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:10,857 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:11,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:11,058 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-05-22 02:52:11,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:11,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574228692] [2021-05-22 02:52:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:11,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:11,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574228692] [2021-05-22 02:52:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574228692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:11,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58044443] [2021-05-22 02:52:11,244 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 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 [2021-05-22 02:52:11,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:11,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:11,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:52:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:11,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:11,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:52:11,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:11,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:11,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:11,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:52:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:11,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58044443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:11,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:11,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:52:11,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148582102] [2021-05-22 02:52:11,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:11,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:11,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:11,542 INFO L87 Difference]: Start difference. First operand 4671 states and 11710 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:12,544 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-05-22 02:52:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:52:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:52:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:12,549 INFO L225 Difference]: With dead ends: 5215 [2021-05-22 02:52:12,549 INFO L226 Difference]: Without dead ends: 5184 [2021-05-22 02:52:12,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 885.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:52:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-05-22 02:52:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-05-22 02:52:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 2.5177349097697572) internal successors, (12138), 4821 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-05-22 02:52:12,594 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-05-22 02:52:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:12,594 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-05-22 02:52:12,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-05-22 02:52:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:12,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:12,598 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:12,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:12,799 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:12,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-05-22 02:52:12,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:12,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83477767] [2021-05-22 02:52:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:12,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:12,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83477767] [2021-05-22 02:52:12,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83477767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:12,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714030528] [2021-05-22 02:52:12,991 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 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 [2021-05-22 02:52:13,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:52:13,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:13,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:52:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:13,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:13,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:13,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:13,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:13,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:13,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:52:13,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:13,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:13,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:13,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:52:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:13,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714030528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:13,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:13,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-22 02:52:13,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235527375] [2021-05-22 02:52:13,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:13,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:13,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:13,265 INFO L87 Difference]: Start difference. First operand 4822 states and 12138 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:52:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:14,962 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-05-22 02:52:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:52:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 30 [2021-05-22 02:52:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:14,968 INFO L225 Difference]: With dead ends: 5370 [2021-05-22 02:52:14,968 INFO L226 Difference]: Without dead ends: 5304 [2021-05-22 02:52:14,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1521.6ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:52:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-05-22 02:52:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-05-22 02:52:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.5141981613891726) internal successors, (12307), 4895 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-05-22 02:52:15,015 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-05-22 02:52:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:15,015 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-05-22 02:52:15,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-05-22 02:52:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-05-22 02:52:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:15,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:15,019 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:15,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:15,219 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-05-22 02:52:15,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:15,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88779828] [2021-05-22 02:52:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:15,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:15,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88779828] [2021-05-22 02:52:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88779828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659402950] [2021-05-22 02:52:15,444 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 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 [2021-05-22 02:52:15,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:52:15,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:15,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:52:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:15,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:15,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:15,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2021-05-22 02:52:15,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-22 02:52:15,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:15,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:15,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-05-22 02:52:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659402950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:16,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:16,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-05-22 02:52:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279453480] [2021-05-22 02:52:16,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:52:16,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:52:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:52:16,088 INFO L87 Difference]: Start difference. First operand 4896 states and 12307 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:17,871 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-05-22 02:52:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:52:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:52:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:17,876 INFO L225 Difference]: With dead ends: 5271 [2021-05-22 02:52:17,876 INFO L226 Difference]: Without dead ends: 5223 [2021-05-22 02:52:17,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1656.3ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:52:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-05-22 02:52:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-05-22 02:52:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.5122000813338756) internal successors, (12355), 4918 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-05-22 02:52:17,921 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-05-22 02:52:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:17,921 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-05-22 02:52:17,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-05-22 02:52:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:52:17,925 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:17,925 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:18,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-05-22 02:52:18,126 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-05-22 02:52:18,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:18,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968447353] [2021-05-22 02:52:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:18,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968447353] [2021-05-22 02:52:18,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968447353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120159053] [2021-05-22 02:52:18,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:52:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:18,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:52:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:18,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-05-22 02:52:18,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:18,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:18,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:18,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-05-22 02:52:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120159053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:18,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:18,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-05-22 02:52:18,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313011055] [2021-05-22 02:52:18,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:52:18,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:52:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:52:18,665 INFO L87 Difference]: Start difference. First operand 4919 states and 12355 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:52:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:20,412 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-05-22 02:52:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:52:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-05-22 02:52:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:20,417 INFO L225 Difference]: With dead ends: 5304 [2021-05-22 02:52:20,418 INFO L226 Difference]: Without dead ends: 5284 [2021-05-22 02:52:20,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1638.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:52:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-05-22 02:52:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-05-22 02:52:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.51401492236338) internal successors, (12467), 4959 states have internal predecessors, (12467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-05-22 02:52:20,466 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-05-22 02:52:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:20,466 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-05-22 02:52:20,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-05-22 02:52:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-05-22 02:52:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:20,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:20,470 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:20,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-05-22 02:52:20,670 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-05-22 02:52:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:20,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696189742] [2021-05-22 02:52:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:20,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:20,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696189742] [2021-05-22 02:52:20,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696189742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:20,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391958146] [2021-05-22 02:52:20,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:20,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:20,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391958146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:20,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:20,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-22 02:52:20,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368962956] [2021-05-22 02:52:20,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:52:20,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:20,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:52:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:52:20,972 INFO L87 Difference]: Start difference. First operand 4960 states and 12467 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:22,021 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-05-22 02:52:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:52:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:22,026 INFO L225 Difference]: With dead ends: 6004 [2021-05-22 02:52:22,027 INFO L226 Difference]: Without dead ends: 6004 [2021-05-22 02:52:22,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 962.3ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:52:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-05-22 02:52:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-05-22 02:52:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.511406844106464) internal successors, (11889), 4734 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-05-22 02:52:22,078 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-05-22 02:52:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:22,078 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-05-22 02:52:22,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-05-22 02:52:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:22,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:22,082 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:22,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-05-22 02:52:22,284 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-05-22 02:52:22,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:22,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597668710] [2021-05-22 02:52:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:22,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:22,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597668710] [2021-05-22 02:52:22,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597668710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:22,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807919032] [2021-05-22 02:52:22,361 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 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 [2021-05-22 02:52:22,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:52:22,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:22,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807919032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:22,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:22,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-22 02:52:22,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134720559] [2021-05-22 02:52:22,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:52:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:52:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:52:22,671 INFO L87 Difference]: Start difference. First operand 4735 states and 11889 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:24,164 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-05-22 02:52:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:52:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:24,170 INFO L225 Difference]: With dead ends: 7971 [2021-05-22 02:52:24,171 INFO L226 Difference]: Without dead ends: 7867 [2021-05-22 02:52:24,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1389.5ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-05-22 02:52:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-05-22 02:52:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-05-22 02:52:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.5299424184261037) internal successors, (13181), 5210 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-05-22 02:52:24,241 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-05-22 02:52:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:24,241 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-05-22 02:52:24,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-05-22 02:52:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:24,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:24,245 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:24,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:24,446 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-05-22 02:52:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691592507] [2021-05-22 02:52:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:24,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:24,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691592507] [2021-05-22 02:52:24,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691592507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:24,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274193307] [2021-05-22 02:52:24,497 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 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 [2021-05-22 02:52:24,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:24,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274193307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:24,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:24,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-05-22 02:52:24,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586190525] [2021-05-22 02:52:24,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:52:24,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:52:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:52:24,733 INFO L87 Difference]: Start difference. First operand 5211 states and 13181 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:25,971 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-05-22 02:52:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:52:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:25,979 INFO L225 Difference]: With dead ends: 9415 [2021-05-22 02:52:25,980 INFO L226 Difference]: Without dead ends: 9411 [2021-05-22 02:52:25,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1083.0ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:52:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-05-22 02:52:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-05-22 02:52:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 2.5451089340546864) internal successors, (17406), 6839 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-05-22 02:52:26,071 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-05-22 02:52:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:26,071 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-05-22 02:52:26,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-05-22 02:52:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:26,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:26,076 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:26,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:26,278 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-05-22 02:52:26,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:26,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071092684] [2021-05-22 02:52:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:26,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:26,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071092684] [2021-05-22 02:52:26,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071092684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:26,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663847515] [2021-05-22 02:52:26,331 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 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 [2021-05-22 02:52:26,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-22 02:52:26,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:26,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663847515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:26,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:26,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-05-22 02:52:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270719462] [2021-05-22 02:52:26,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:52:26,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:52:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:52:26,528 INFO L87 Difference]: Start difference. First operand 6840 states and 17406 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:27,477 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-05-22 02:52:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:52:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:27,484 INFO L225 Difference]: With dead ends: 7287 [2021-05-22 02:52:27,484 INFO L226 Difference]: Without dead ends: 7283 [2021-05-22 02:52:27,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 863.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:52:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-05-22 02:52:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-05-22 02:52:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 2.5457362053703156) internal successors, (17255), 6778 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-05-22 02:52:27,554 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-05-22 02:52:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:27,555 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-05-22 02:52:27,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-05-22 02:52:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:27,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:27,559 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:27,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-05-22 02:52:27,760 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-05-22 02:52:27,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:27,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827351417] [2021-05-22 02:52:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:27,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827351417] [2021-05-22 02:52:27,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827351417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255471611] [2021-05-22 02:52:27,812 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 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 [2021-05-22 02:52:27,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:52:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:28,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255471611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:28,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:28,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-05-22 02:52:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661889564] [2021-05-22 02:52:28,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:52:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:52:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:52:28,035 INFO L87 Difference]: Start difference. First operand 6779 states and 17255 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:28,775 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-05-22 02:52:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:52:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:28,783 INFO L225 Difference]: With dead ends: 8864 [2021-05-22 02:52:28,784 INFO L226 Difference]: Without dead ends: 8852 [2021-05-22 02:52:28,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:52:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-05-22 02:52:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-05-22 02:52:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 7048 states have (on average 2.555192962542565) internal successors, (18009), 7048 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-05-22 02:52:28,874 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-05-22 02:52:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:28,874 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-05-22 02:52:28,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-05-22 02:52:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:28,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:28,879 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:29,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:29,080 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-05-22 02:52:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:29,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138702241] [2021-05-22 02:52:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:29,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138702241] [2021-05-22 02:52:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138702241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861910106] [2021-05-22 02:52:29,139 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 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 [2021-05-22 02:52:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:29,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:29,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861910106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:29,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:29,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-22 02:52:29,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99422513] [2021-05-22 02:52:29,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:52:29,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:29,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:52:29,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:52:29,377 INFO L87 Difference]: Start difference. First operand 7049 states and 18009 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:30,435 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-05-22 02:52:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:52:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:30,443 INFO L225 Difference]: With dead ends: 8195 [2021-05-22 02:52:30,443 INFO L226 Difference]: Without dead ends: 8183 [2021-05-22 02:52:30,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 966.9ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:52:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-05-22 02:52:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-05-22 02:52:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 2.56353591160221) internal successors, (18560), 7240 states have internal predecessors, (18560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-05-22 02:52:30,522 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-05-22 02:52:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:30,523 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-05-22 02:52:30,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-05-22 02:52:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:30,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:30,528 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:30,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:30,728 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:30,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-05-22 02:52:30,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:30,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884387397] [2021-05-22 02:52:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:30,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:30,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884387397] [2021-05-22 02:52:30,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884387397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986412644] [2021-05-22 02:52:30,789 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 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 [2021-05-22 02:52:30,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:30,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:30,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986412644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:30,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:30,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-22 02:52:30,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644594312] [2021-05-22 02:52:30,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:30,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:30,993 INFO L87 Difference]: Start difference. First operand 7241 states and 18560 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:31,978 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-05-22 02:52:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:52:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:31,986 INFO L225 Difference]: With dead ends: 8748 [2021-05-22 02:52:31,986 INFO L226 Difference]: Without dead ends: 8722 [2021-05-22 02:52:31,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 886.8ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:52:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-05-22 02:52:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-05-22 02:52:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.5699115044247787) internal successors, (18876), 7345 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-05-22 02:52:32,069 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-05-22 02:52:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:32,069 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-05-22 02:52:32,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-05-22 02:52:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:32,074 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:32,074 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:32,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-05-22 02:52:32,275 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-05-22 02:52:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:32,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976904789] [2021-05-22 02:52:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:32,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976904789] [2021-05-22 02:52:32,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976904789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990337063] [2021-05-22 02:52:32,342 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 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 [2021-05-22 02:52:32,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-22 02:52:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:32,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990337063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:32,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:32,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-22 02:52:32,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329732398] [2021-05-22 02:52:32,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:52:32,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:52:32,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:52:32,584 INFO L87 Difference]: Start difference. First operand 7346 states and 18876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:33,553 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-05-22 02:52:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:52:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:33,563 INFO L225 Difference]: With dead ends: 9131 [2021-05-22 02:52:33,563 INFO L226 Difference]: Without dead ends: 9101 [2021-05-22 02:52:33,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 905.5ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:52:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-05-22 02:52:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-05-22 02:52:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.5696751983236044) internal successors, (17168), 6681 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-05-22 02:52:33,686 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-05-22 02:52:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:33,686 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-05-22 02:52:33,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-05-22 02:52:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:33,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:33,690 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:33,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:33,891 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-05-22 02:52:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:33,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626544573] [2021-05-22 02:52:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:33,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:33,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626544573] [2021-05-22 02:52:33,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626544573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:33,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162426795] [2021-05-22 02:52:33,982 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 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 [2021-05-22 02:52:34,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:34,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162426795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:34,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:34,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-22 02:52:34,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337542871] [2021-05-22 02:52:34,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:52:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:52:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:52:34,188 INFO L87 Difference]: Start difference. First operand 6682 states and 17168 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-05-22 02:52:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:35,264 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-05-22 02:52:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:52:35,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:35,272 INFO L225 Difference]: With dead ends: 8276 [2021-05-22 02:52:35,272 INFO L226 Difference]: Without dead ends: 8276 [2021-05-22 02:52:35,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 947.4ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:52:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-05-22 02:52:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-05-22 02:52:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 2.554284767114205) internal successors, (15410), 6033 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-05-22 02:52:35,357 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-05-22 02:52:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:35,357 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-05-22 02:52:35,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-05-22 02:52:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-05-22 02:52:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:35,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:35,362 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:35,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-05-22 02:52:35,563 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-05-22 02:52:35,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:35,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409050741] [2021-05-22 02:52:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:35,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:35,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409050741] [2021-05-22 02:52:35,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409050741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:35,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57094631] [2021-05-22 02:52:35,644 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 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 [2021-05-22 02:52:35,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:52:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:35,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57094631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:35,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:35,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-22 02:52:35,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257974298] [2021-05-22 02:52:35,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:52:35,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:52:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:52:35,875 INFO L87 Difference]: Start difference. First operand 6034 states and 15410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:36,931 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-05-22 02:52:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:52:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:36,937 INFO L225 Difference]: With dead ends: 7180 [2021-05-22 02:52:36,937 INFO L226 Difference]: Without dead ends: 7114 [2021-05-22 02:52:36,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 990.0ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:52:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-05-22 02:52:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-05-22 02:52:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.553177368508379) internal successors, (15388), 6027 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-05-22 02:52:37,010 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-05-22 02:52:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:37,010 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-05-22 02:52:37,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-05-22 02:52:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:37,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:37,015 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:37,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-05-22 02:52:37,228 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-05-22 02:52:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:37,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386800859] [2021-05-22 02:52:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:37,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:37,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386800859] [2021-05-22 02:52:37,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386800859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:37,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062917111] [2021-05-22 02:52:37,344 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 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 [2021-05-22 02:52:37,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-22 02:52:37,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:37,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062917111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:37,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:37,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-22 02:52:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013009194] [2021-05-22 02:52:37,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:52:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:52:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:52:37,609 INFO L87 Difference]: Start difference. First operand 6028 states and 15388 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-05-22 02:52:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:38,811 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-05-22 02:52:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:52:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:38,818 INFO L225 Difference]: With dead ends: 8027 [2021-05-22 02:52:38,818 INFO L226 Difference]: Without dead ends: 8027 [2021-05-22 02:52:38,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1126.1ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:52:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-05-22 02:52:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-05-22 02:52:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.526865945351183) internal successors, (13779), 5453 states have internal predecessors, (13779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-05-22 02:52:38,883 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-05-22 02:52:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:38,883 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-05-22 02:52:38,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-05-22 02:52:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-05-22 02:52:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:38,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:38,887 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:39,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-22 02:52:39,088 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:39,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-05-22 02:52:39,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:39,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149720711] [2021-05-22 02:52:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:39,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:39,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149720711] [2021-05-22 02:52:39,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149720711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:39,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729331870] [2021-05-22 02:52:39,162 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 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 [2021-05-22 02:52:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729331870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:39,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:39,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-22 02:52:39,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853307872] [2021-05-22 02:52:39,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:39,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:39,359 INFO L87 Difference]: Start difference. First operand 5454 states and 13779 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:40,341 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-05-22 02:52:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:52:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:40,346 INFO L225 Difference]: With dead ends: 6472 [2021-05-22 02:52:40,347 INFO L226 Difference]: Without dead ends: 6433 [2021-05-22 02:52:40,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:52:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-05-22 02:52:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-05-22 02:52:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5241151659636896) internal successors, (13764), 5453 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-05-22 02:52:40,406 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-05-22 02:52:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:40,406 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-05-22 02:52:40,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-05-22 02:52:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:40,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:40,410 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:40,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-05-22 02:52:40,611 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-05-22 02:52:40,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:40,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442672410] [2021-05-22 02:52:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:40,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442672410] [2021-05-22 02:52:40,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442672410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024890799] [2021-05-22 02:52:40,673 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 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 [2021-05-22 02:52:40,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:40,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:40,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024890799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:40,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:40,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-22 02:52:40,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925957268] [2021-05-22 02:52:40,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:40,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:40,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:40,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:40,870 INFO L87 Difference]: Start difference. First operand 5454 states and 13764 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-05-22 02:52:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:42,133 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-05-22 02:52:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 02:52:42,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:42,139 INFO L225 Difference]: With dead ends: 8061 [2021-05-22 02:52:42,140 INFO L226 Difference]: Without dead ends: 8061 [2021-05-22 02:52:42,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1078.8ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:52:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-05-22 02:52:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-05-22 02:52:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 2.5155217965653898) internal successors, (15234), 6056 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-05-22 02:52:42,212 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-05-22 02:52:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:42,212 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-05-22 02:52:42,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-05-22 02:52:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-05-22 02:52:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:42,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:42,217 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:42,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:42,417 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-05-22 02:52:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:42,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310336891] [2021-05-22 02:52:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:42,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310336891] [2021-05-22 02:52:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310336891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373763078] [2021-05-22 02:52:42,473 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 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 [2021-05-22 02:52:42,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:52:42,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:42,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373763078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:42,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:42,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-22 02:52:42,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909361586] [2021-05-22 02:52:42,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:52:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:52:42,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:52:42,667 INFO L87 Difference]: Start difference. First operand 6057 states and 15234 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:43,563 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-05-22 02:52:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:52:43,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:43,569 INFO L225 Difference]: With dead ends: 6889 [2021-05-22 02:52:43,569 INFO L226 Difference]: Without dead ends: 6871 [2021-05-22 02:52:43,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:52:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-05-22 02:52:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-05-22 02:52:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 2.517774851876234) internal successors, (15298), 6076 states have internal predecessors, (15298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-05-22 02:52:43,635 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-05-22 02:52:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:43,635 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-05-22 02:52:43,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-05-22 02:52:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:43,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:43,639 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:43,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:43,840 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-05-22 02:52:43,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:43,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787465842] [2021-05-22 02:52:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:43,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:43,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787465842] [2021-05-22 02:52:43,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787465842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:43,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097645309] [2021-05-22 02:52:43,908 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 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 [2021-05-22 02:52:43,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:43,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:43,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:44,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097645309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:44,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:44,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-22 02:52:44,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674151650] [2021-05-22 02:52:44,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:52:44,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:52:44,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:52:44,131 INFO L87 Difference]: Start difference. First operand 6077 states and 15298 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:45,431 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-05-22 02:52:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:52:45,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:45,441 INFO L225 Difference]: With dead ends: 10330 [2021-05-22 02:52:45,441 INFO L226 Difference]: Without dead ends: 10330 [2021-05-22 02:52:45,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1170.6ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:52:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-05-22 02:52:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-05-22 02:52:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9090 states have (on average 2.5674367436743672) internal successors, (23338), 9090 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-05-22 02:52:45,558 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-05-22 02:52:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:45,559 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-05-22 02:52:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-05-22 02:52:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:45,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:45,565 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:45,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-05-22 02:52:45,766 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-05-22 02:52:45,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:45,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778387051] [2021-05-22 02:52:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:45,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:45,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778387051] [2021-05-22 02:52:45,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778387051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:45,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477571710] [2021-05-22 02:52:45,816 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 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 [2021-05-22 02:52:45,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:52:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:46,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477571710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:46,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:46,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-05-22 02:52:46,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327261436] [2021-05-22 02:52:46,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:52:46,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:52:46,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:52:46,053 INFO L87 Difference]: Start difference. First operand 9091 states and 23338 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:46,953 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-05-22 02:52:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:52:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:46,964 INFO L225 Difference]: With dead ends: 10140 [2021-05-22 02:52:46,964 INFO L226 Difference]: Without dead ends: 10136 [2021-05-22 02:52:46,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 807.9ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:52:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-05-22 02:52:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-05-22 02:52:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 8994 states have (on average 2.5654881031798977) internal successors, (23074), 8994 states have internal predecessors, (23074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-05-22 02:52:47,079 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-05-22 02:52:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:47,079 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-05-22 02:52:47,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-05-22 02:52:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:47,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:47,085 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:47,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:47,286 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:47,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-05-22 02:52:47,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:47,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710468501] [2021-05-22 02:52:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:47,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:47,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710468501] [2021-05-22 02:52:47,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710468501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:47,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510150479] [2021-05-22 02:52:47,341 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 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 [2021-05-22 02:52:47,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:52:47,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:47,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510150479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:47,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:47,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-22 02:52:47,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841392617] [2021-05-22 02:52:47,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:52:47,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:52:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:52:47,537 INFO L87 Difference]: Start difference. First operand 8995 states and 23074 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:48,410 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-05-22 02:52:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:52:48,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:48,422 INFO L225 Difference]: With dead ends: 10548 [2021-05-22 02:52:48,422 INFO L226 Difference]: Without dead ends: 10536 [2021-05-22 02:52:48,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 757.0ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:52:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-05-22 02:52:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-05-22 02:52:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9183 states, 9182 states have (on average 2.5686125027227185) internal successors, (23585), 9182 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-05-22 02:52:48,546 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-05-22 02:52:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:48,546 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-05-22 02:52:48,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-05-22 02:52:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:48,553 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:48,553 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:48,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:48,766 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-05-22 02:52:48,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:48,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710906414] [2021-05-22 02:52:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:48,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:48,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710906414] [2021-05-22 02:52:48,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710906414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:48,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987203224] [2021-05-22 02:52:48,828 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 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 [2021-05-22 02:52:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:49,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987203224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:49,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:49,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-22 02:52:49,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620808986] [2021-05-22 02:52:49,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:52:49,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:52:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:52:49,027 INFO L87 Difference]: Start difference. First operand 9183 states and 23585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:49,908 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-05-22 02:52:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:52:49,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:49,919 INFO L225 Difference]: With dead ends: 11364 [2021-05-22 02:52:49,919 INFO L226 Difference]: Without dead ends: 11344 [2021-05-22 02:52:49,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:52:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-05-22 02:52:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-05-22 02:52:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.574075899457861) internal successors, (26114), 10145 states have internal predecessors, (26114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-05-22 02:52:50,052 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-05-22 02:52:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:50,053 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-05-22 02:52:50,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-05-22 02:52:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:50,060 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:50,060 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:50,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:50,260 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-05-22 02:52:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:50,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249936789] [2021-05-22 02:52:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:50,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249936789] [2021-05-22 02:52:50,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249936789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175590871] [2021-05-22 02:52:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:50,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:50,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:50,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175590871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:50,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:50,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-22 02:52:50,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503661159] [2021-05-22 02:52:50,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:52:50,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:50,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:52:50,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:52:50,623 INFO L87 Difference]: Start difference. First operand 10146 states and 26114 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:51,597 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-05-22 02:52:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:52:51,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:51,610 INFO L225 Difference]: With dead ends: 12734 [2021-05-22 02:52:51,611 INFO L226 Difference]: Without dead ends: 12706 [2021-05-22 02:52:51,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:52:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-05-22 02:52:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-05-22 02:52:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 2.579330294530154) internal successors, (29425), 11408 states have internal predecessors, (29425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-05-22 02:52:51,779 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-05-22 02:52:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:51,779 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-05-22 02:52:51,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-05-22 02:52:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:52:51,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:51,787 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:52,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-05-22 02:52:52,009 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-05-22 02:52:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:52,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031815800] [2021-05-22 02:52:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:52,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:52,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031815800] [2021-05-22 02:52:52,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031815800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:52,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298770561] [2021-05-22 02:52:52,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:52,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:52:52,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:52:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:52,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298770561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:52,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:52,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-22 02:52:52,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113689527] [2021-05-22 02:52:52,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:52:52,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:52:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:52:52,319 INFO L87 Difference]: Start difference. First operand 11409 states and 29425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:53,375 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-05-22 02:52:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:52:53,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:52:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:53,389 INFO L225 Difference]: With dead ends: 12970 [2021-05-22 02:52:53,389 INFO L226 Difference]: Without dead ends: 12934 [2021-05-22 02:52:53,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:52:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-05-22 02:52:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-05-22 02:52:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.5852185745875147) internal successors, (30397), 11758 states have internal predecessors, (30397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-05-22 02:52:53,548 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-05-22 02:52:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:53,548 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-05-22 02:52:53,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-05-22 02:52:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:52:53,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:53,557 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:53,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-05-22 02:52:53,758 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-05-22 02:52:53,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:53,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140934810] [2021-05-22 02:52:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:54,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140934810] [2021-05-22 02:52:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140934810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742919161] [2021-05-22 02:52:54,121 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 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 [2021-05-22 02:52:54,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:54,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:52:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:54,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:54,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:54,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:54,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:52:54,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:54,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:54,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:54,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:52:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:54,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742919161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:54,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:54,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-05-22 02:52:54,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390204219] [2021-05-22 02:52:54,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:52:54,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:52:54,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:52:54,596 INFO L87 Difference]: Start difference. First operand 11759 states and 30397 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:52:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:57,247 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-05-22 02:52:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:52:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 34 [2021-05-22 02:52:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:57,264 INFO L225 Difference]: With dead ends: 14875 [2021-05-22 02:52:57,264 INFO L226 Difference]: Without dead ends: 14868 [2021-05-22 02:52:57,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2412.0ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:52:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-05-22 02:52:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-05-22 02:52:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.5852596314907874) internal successors, (30868), 11940 states have internal predecessors, (30868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-05-22 02:52:57,421 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-05-22 02:52:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:57,421 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-05-22 02:52:57,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:52:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-05-22 02:52:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:52:57,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:57,430 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:57,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-05-22 02:52:57,631 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-05-22 02:52:57,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:57,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22816162] [2021-05-22 02:52:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:57,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:57,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22816162] [2021-05-22 02:52:57,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22816162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:57,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357160495] [2021-05-22 02:52:57,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:52:57,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:52:57,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:57,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:52:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:52:58,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:58,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:52:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:52:58,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:52:58,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:52:58,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:52:58,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:52:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357160495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:58,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:58,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-05-22 02:52:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302028169] [2021-05-22 02:52:58,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:52:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:52:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:52:58,422 INFO L87 Difference]: Start difference. First operand 11941 states and 30868 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:53:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:00,461 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-05-22 02:53:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:53:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 34 [2021-05-22 02:53:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:00,476 INFO L225 Difference]: With dead ends: 14838 [2021-05-22 02:53:00,477 INFO L226 Difference]: Without dead ends: 14775 [2021-05-22 02:53:00,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1854.4ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:53:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-05-22 02:53:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-05-22 02:53:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 2.5838265944143393) internal successors, (30993), 11995 states have internal predecessors, (30993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-05-22 02:53:00,621 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-05-22 02:53:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:00,621 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-05-22 02:53:00,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:53:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-05-22 02:53:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:00,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:00,629 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:00,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:00,830 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-05-22 02:53:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524899509] [2021-05-22 02:53:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:01,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524899509] [2021-05-22 02:53:01,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524899509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044847067] [2021-05-22 02:53:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:53:01,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:53:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:01,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:53:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:01,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:01,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-05-22 02:53:02,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-22 02:53:02,037 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-05-22 02:53:02,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-22 02:53:02,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-05-22 02:53:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:02,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044847067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:02,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:02,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-05-22 02:53:02,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688585807] [2021-05-22 02:53:02,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:53:02,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:02,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:53:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:53:02,114 INFO L87 Difference]: Start difference. First operand 11996 states and 30993 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) [2021-05-22 02:53:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:04,482 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-05-22 02:53:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:53:04,483 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 34 [2021-05-22 02:53:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:04,503 INFO L225 Difference]: With dead ends: 15015 [2021-05-22 02:53:04,503 INFO L226 Difference]: Without dead ends: 14957 [2021-05-22 02:53:04,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2328.2ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:53:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-05-22 02:53:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-05-22 02:53:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5794431132776996) internal successors, (31219), 12103 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-05-22 02:53:04,686 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-05-22 02:53:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:04,686 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-05-22 02:53:04,686 INFO L483 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) [2021-05-22 02:53:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-05-22 02:53:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:04,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:04,695 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-22 02:53:04,896 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-05-22 02:53:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:04,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685912019] [2021-05-22 02:53:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:05,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:05,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685912019] [2021-05-22 02:53:05,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685912019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:05,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812429118] [2021-05-22 02:53:05,240 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 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 [2021-05-22 02:53:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:05,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:05,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:05,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:05,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:05,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:05,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:05,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812429118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:05,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:05,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-05-22 02:53:05,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018277305] [2021-05-22 02:53:05,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:05,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:05,649 INFO L87 Difference]: Start difference. First operand 12104 states and 31219 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:53:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:08,002 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-05-22 02:53:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:53:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 34 [2021-05-22 02:53:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:08,018 INFO L225 Difference]: With dead ends: 15455 [2021-05-22 02:53:08,018 INFO L226 Difference]: Without dead ends: 15407 [2021-05-22 02:53:08,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2079.4ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:53:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-05-22 02:53:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-05-22 02:53:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12292 states, 12291 states have (on average 2.5755430803026607) internal successors, (31656), 12291 states have internal predecessors, (31656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-05-22 02:53:08,213 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-05-22 02:53:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:08,213 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-05-22 02:53:08,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:53:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-05-22 02:53:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:08,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:08,222 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:08,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:08,423 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-05-22 02:53:08,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:08,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329032588] [2021-05-22 02:53:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:08,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:08,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329032588] [2021-05-22 02:53:08,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329032588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:08,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064444455] [2021-05-22 02:53:08,801 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 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 [2021-05-22 02:53:08,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:08,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:08,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:09,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:09,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:09,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:09,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:09,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:09,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:09,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:09,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064444455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:09,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:09,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-05-22 02:53:09,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325560029] [2021-05-22 02:53:09,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:09,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:09,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:09,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:09,196 INFO L87 Difference]: Start difference. First operand 12292 states and 31656 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:53:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:11,690 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-05-22 02:53:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:53:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 34 [2021-05-22 02:53:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:11,707 INFO L225 Difference]: With dead ends: 16292 [2021-05-22 02:53:11,707 INFO L226 Difference]: Without dead ends: 16283 [2021-05-22 02:53:11,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2423.2ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:53:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-05-22 02:53:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-05-22 02:53:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 12440 states have (on average 2.5761254019292603) internal successors, (32047), 12440 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-05-22 02:53:11,900 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-05-22 02:53:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:11,900 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-05-22 02:53:11,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-05-22 02:53:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-05-22 02:53:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:11,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:11,909 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:12,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:12,110 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-05-22 02:53:12,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:12,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549827776] [2021-05-22 02:53:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:53:12,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:12,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549827776] [2021-05-22 02:53:12,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549827776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:12,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327935700] [2021-05-22 02:53:12,356 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 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 [2021-05-22 02:53:12,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:53:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:12,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:53:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:13,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:13,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:13,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:13,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:13,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-05-22 02:53:13,878 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-05-22 02:53:13,992 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-05-22 02:53:14,312 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-05-22 02:53:14,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-22 02:53:14,754 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-05-22 02:53:14,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-22 02:53:14,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-05-22 02:53:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:14,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327935700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:14,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:14,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-05-22 02:53:14,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533074191] [2021-05-22 02:53:14,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 02:53:14,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:14,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 02:53:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:53:14,809 INFO L87 Difference]: Start difference. First operand 12441 states and 32047 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) [2021-05-22 02:53:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:23,612 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-05-22 02:53:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:53:23,612 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 34 [2021-05-22 02:53:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:23,629 INFO L225 Difference]: With dead ends: 16489 [2021-05-22 02:53:23,629 INFO L226 Difference]: Without dead ends: 16467 [2021-05-22 02:53:23,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 4281.6ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:53:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-05-22 02:53:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-05-22 02:53:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.575421686746988) internal successors, (32064), 12450 states have internal predecessors, (32064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-05-22 02:53:23,796 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-05-22 02:53:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:23,796 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-05-22 02:53:23,796 INFO L483 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) [2021-05-22 02:53:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-05-22 02:53:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:23,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:23,805 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:24,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-05-22 02:53:24,006 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-05-22 02:53:24,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:24,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841677490] [2021-05-22 02:53:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:53:24,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:24,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841677490] [2021-05-22 02:53:24,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841677490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:24,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328982373] [2021-05-22 02:53:24,292 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 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 [2021-05-22 02:53:24,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:24,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:24,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:24,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:24,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:24,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:24,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:24,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:24,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:24,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:24,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:24,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:24,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328982373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:24,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:24,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-05-22 02:53:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486288386] [2021-05-22 02:53:24,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:53:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:53:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:53:24,815 INFO L87 Difference]: Start difference. First operand 12451 states and 32064 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-05-22 02:53:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:26,975 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-05-22 02:53:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:53:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-05-22 02:53:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:26,994 INFO L225 Difference]: With dead ends: 16411 [2021-05-22 02:53:26,994 INFO L226 Difference]: Without dead ends: 16378 [2021-05-22 02:53:26,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2057.8ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:53:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-05-22 02:53:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-05-22 02:53:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.572110792741165) internal successors, (32316), 12564 states have internal predecessors, (32316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-05-22 02:53:27,199 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-05-22 02:53:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:27,199 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-05-22 02:53:27,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-05-22 02:53:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-05-22 02:53:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:27,208 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:27,208 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:27,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable864,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:27,409 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:27,409 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-05-22 02:53:27,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:27,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151928586] [2021-05-22 02:53:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:53:27,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:27,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151928586] [2021-05-22 02:53:27,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151928586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:27,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260843584] [2021-05-22 02:53:27,634 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 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 [2021-05-22 02:53:27,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:53:27,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:27,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:27,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:27,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:28,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:28,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:28,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:28,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:28,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260843584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:28,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:28,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-05-22 02:53:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124521604] [2021-05-22 02:53:28,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:53:28,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:53:28,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:53:28,031 INFO L87 Difference]: Start difference. First operand 12565 states and 32316 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-05-22 02:53:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:30,901 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-05-22 02:53:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 02:53:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-05-22 02:53:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:30,919 INFO L225 Difference]: With dead ends: 16814 [2021-05-22 02:53:30,919 INFO L226 Difference]: Without dead ends: 16795 [2021-05-22 02:53:30,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2502.2ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:53:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-05-22 02:53:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-05-22 02:53:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12569 states, 12568 states have (on average 2.5725652450668366) internal successors, (32332), 12568 states have internal predecessors, (32332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-05-22 02:53:31,122 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-05-22 02:53:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:31,122 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-05-22 02:53:31,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-05-22 02:53:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-05-22 02:53:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:31,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:31,131 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:31,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:31,331 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:31,332 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-05-22 02:53:31,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:31,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179902409] [2021-05-22 02:53:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:53:31,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:31,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179902409] [2021-05-22 02:53:31,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179902409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:31,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450359046] [2021-05-22 02:53:31,648 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 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 [2021-05-22 02:53:31,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:53:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:31,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:53:31,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:32,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:32,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:32,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:32,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-05-22 02:53:32,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-22 02:53:32,405 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-05-22 02:53:32,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-22 02:53:32,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-05-22 02:53:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450359046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:32,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:32,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-05-22 02:53:32,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640317981] [2021-05-22 02:53:32,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:53:32,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:32,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:53:32,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:53:32,466 INFO L87 Difference]: Start difference. First operand 12569 states and 32332 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) [2021-05-22 02:53:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:34,884 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-05-22 02:53:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:53:34,885 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 34 [2021-05-22 02:53:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:34,902 INFO L225 Difference]: With dead ends: 15950 [2021-05-22 02:53:34,902 INFO L226 Difference]: Without dead ends: 15904 [2021-05-22 02:53:34,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2320.9ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:53:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-05-22 02:53:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-05-22 02:53:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12573 states, 12572 states have (on average 2.5706331530384983) internal successors, (32318), 12572 states have internal predecessors, (32318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-05-22 02:53:35,103 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-05-22 02:53:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:35,103 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-05-22 02:53:35,103 INFO L483 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) [2021-05-22 02:53:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-05-22 02:53:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:35,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:35,115 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:35,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-05-22 02:53:35,334 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-05-22 02:53:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:35,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935375373] [2021-05-22 02:53:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:53:35,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935375373] [2021-05-22 02:53:35,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935375373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299501055] [2021-05-22 02:53:35,549 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 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 [2021-05-22 02:53:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:35,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:35,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:35,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:35,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:35,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:35,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:35,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:35,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299501055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:35,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:35,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-22 02:53:35,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100166121] [2021-05-22 02:53:35,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:35,943 INFO L87 Difference]: Start difference. First operand 12573 states and 32318 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:38,075 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-05-22 02:53:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:53:38,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:53:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:38,091 INFO L225 Difference]: With dead ends: 13633 [2021-05-22 02:53:38,091 INFO L226 Difference]: Without dead ends: 13606 [2021-05-22 02:53:38,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1940.2ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:53:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-05-22 02:53:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-05-22 02:53:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 2.5693430656934306) internal successors, (32384), 12604 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-05-22 02:53:38,245 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-05-22 02:53:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:38,245 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-05-22 02:53:38,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-05-22 02:53:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:38,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:38,255 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:38,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:38,456 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-05-22 02:53:38,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:38,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041444718] [2021-05-22 02:53:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:53:38,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041444718] [2021-05-22 02:53:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041444718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365767748] [2021-05-22 02:53:38,782 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 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 [2021-05-22 02:53:38,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:38,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:39,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:39,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:39,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:39,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:39,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365767748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:39,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:39,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-05-22 02:53:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335244882] [2021-05-22 02:53:39,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:53:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:53:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:53:39,206 INFO L87 Difference]: Start difference. First operand 12605 states and 32384 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-05-22 02:53:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:41,267 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-05-22 02:53:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:53:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-05-22 02:53:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:41,285 INFO L225 Difference]: With dead ends: 16746 [2021-05-22 02:53:41,285 INFO L226 Difference]: Without dead ends: 16713 [2021-05-22 02:53:41,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2013.5ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:53:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-05-22 02:53:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-05-22 02:53:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5682610072853977) internal successors, (32432), 12628 states have internal predecessors, (32432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-05-22 02:53:41,450 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-05-22 02:53:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:41,450 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-05-22 02:53:41,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-05-22 02:53:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-05-22 02:53:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:41,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:41,459 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:41,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:41,661 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-05-22 02:53:41,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:41,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055491105] [2021-05-22 02:53:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:53:41,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:41,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055491105] [2021-05-22 02:53:41,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055491105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:41,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706246675] [2021-05-22 02:53:41,948 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 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 [2021-05-22 02:53:41,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:53:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:41,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:53:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:42,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:42,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:42,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 97 treesize of output 247 [2021-05-22 02:53:43,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-22 02:53:43,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:43,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:43,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-05-22 02:53:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706246675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-05-22 02:53:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397986980] [2021-05-22 02:53:43,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:53:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:53:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:53:43,524 INFO L87 Difference]: Start difference. First operand 12629 states and 32432 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) [2021-05-22 02:53:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:47,976 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-05-22 02:53:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-22 02:53:47,976 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 34 [2021-05-22 02:53:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:47,995 INFO L225 Difference]: With dead ends: 16941 [2021-05-22 02:53:47,995 INFO L226 Difference]: Without dead ends: 16910 [2021-05-22 02:53:47,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 3956.6ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:53:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-05-22 02:53:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-05-22 02:53:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5688945201140325) internal successors, (32440), 12628 states have internal predecessors, (32440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-05-22 02:53:48,168 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-05-22 02:53:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:48,169 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-05-22 02:53:48,169 INFO L483 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) [2021-05-22 02:53:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-05-22 02:53:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:48,178 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:48,178 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:48,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:48,381 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-05-22 02:53:48,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:48,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188964736] [2021-05-22 02:53:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:53:48,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:48,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188964736] [2021-05-22 02:53:48,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188964736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:48,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260044089] [2021-05-22 02:53:48,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:48,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:48,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:48,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:49,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:49,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:49,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:49,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:49,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:49,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:49,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:49,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:49,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260044089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:49,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:49,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-05-22 02:53:49,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084232378] [2021-05-22 02:53:49,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:53:49,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:53:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:53:49,085 INFO L87 Difference]: Start difference. First operand 12629 states and 32440 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-05-22 02:53:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:51,396 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-05-22 02:53:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:53:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-05-22 02:53:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:51,410 INFO L225 Difference]: With dead ends: 13890 [2021-05-22 02:53:51,410 INFO L226 Difference]: Without dead ends: 13872 [2021-05-22 02:53:51,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2090.1ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:53:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-05-22 02:53:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-05-22 02:53:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 2.568857527947356) internal successors, (32401), 12613 states have internal predecessors, (32401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-05-22 02:53:51,564 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-05-22 02:53:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:51,565 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-05-22 02:53:51,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-05-22 02:53:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-05-22 02:53:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:51,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:51,574 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:51,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:51,774 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-05-22 02:53:51,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:51,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75148715] [2021-05-22 02:53:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:52,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:52,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75148715] [2021-05-22 02:53:52,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75148715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:52,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981599857] [2021-05-22 02:53:52,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:53:52,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-22 02:53:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:52,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:53:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:52,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:52,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:52,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:52,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:52,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-05-22 02:53:52,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:53:52,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:52,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-22 02:53:52,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-05-22 02:53:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:52,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981599857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:52,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:52,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-05-22 02:53:52,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828786901] [2021-05-22 02:53:52,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:53:52,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:53:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:53:52,436 INFO L87 Difference]: Start difference. First operand 12614 states and 32401 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-05-22 02:53:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:53,762 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-05-22 02:53:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:53:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-05-22 02:53:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:53,775 INFO L225 Difference]: With dead ends: 13122 [2021-05-22 02:53:53,775 INFO L226 Difference]: Without dead ends: 13095 [2021-05-22 02:53:53,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1119.6ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:53:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-05-22 02:53:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-05-22 02:53:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 2.565472415979708) internal successors, (32366), 12616 states have internal predecessors, (32366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-05-22 02:53:53,942 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-05-22 02:53:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:53,942 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-05-22 02:53:53,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-05-22 02:53:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-05-22 02:53:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:53:53,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:53,953 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:54,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:54,153 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-05-22 02:53:54,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:54,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062255916] [2021-05-22 02:53:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:54,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:54,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062255916] [2021-05-22 02:53:54,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062255916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:54,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468983297] [2021-05-22 02:53:54,402 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 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 [2021-05-22 02:53:54,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-22 02:53:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:54,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:53:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:55,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:55,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:55,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:55,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-22 02:53:56,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:53:56,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:53:56,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-05-22 02:53:56,685 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 196 [2021-05-22 02:53:57,620 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-05-22 02:53:58,058 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-05-22 02:53:58,561 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-05-22 02:53:59,084 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-05-22 02:53:59,516 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-05-22 02:54:00,852 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-05-22 02:54:01,348 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-05-22 02:54:02,196 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-05-22 02:54:02,831 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-05-22 02:54:03,423 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-05-22 02:54:03,570 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-05-22 02:54:03,972 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-05-22 02:54:05,369 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-05-22 02:54:06,899 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-05-22 02:54:08,588 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-05-22 02:54:10,594 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-05-22 02:54:12,189 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-05-22 02:54:13,234 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 330 [2021-05-22 02:54:39,717 WARN L205 SmtUtils]: Spent 26.36 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-05-22 02:55:17,046 WARN L205 SmtUtils]: Spent 37.32 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1621 [2021-05-22 02:56:00,860 WARN L205 SmtUtils]: Spent 43.80 s on a formula simplification. DAG size of input: 2109 DAG size of output: 1630 [2021-05-22 02:56:55,473 WARN L205 SmtUtils]: Spent 54.54 s on a formula simplification. DAG size of input: 1100 DAG size of output: 1363 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown