/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:19:03,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:19:03,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:19:03,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:19:03,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 21:19:03,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:19:03,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:19:03,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:19:03,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:19:03,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:19:03,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:19:03,863 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:19:03,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:19:03,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:19:03,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:19:03,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:19:03,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:19:03,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:19:03,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:19:03,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:19:03,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:19:03,866 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:19:03,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:19:03,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:19:04,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:19:04,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:19:04,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:19:04,164 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:19:04,165 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:19:04,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-05-21 21:19:04,166 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-05-21 21:19:04,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:19:04,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:19:04,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:19:04,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:19:04,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:19:04,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:19:04,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:19:04,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:19:04,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:19:04,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/1) ... [2021-05-21 21:19:04,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:19:04,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:19:04,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:19:04,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:19:04,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (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 [2021-05-21 21:19:04,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:19:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:19:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:19:04,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:19:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:19:04,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:19:04,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:19:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:19:04,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:19:04,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:19:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:19:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:19:04,335 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:19:04,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:19:04,519 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:19:04,520 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:19:04 BoogieIcfgContainer [2021-05-21 21:19:04,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:19:04,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:19:04,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:19:04,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:19:04,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:19:04" (1/2) ... [2021-05-21 21:19:04,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3077a082 and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:19:04, skipping insertion in model container [2021-05-21 21:19:04,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:19:04" (2/2) ... [2021-05-21 21:19:04,526 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-05-21 21:19:04,531 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:19:04,531 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:19:04,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:19:04,532 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:19:04,560 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 21:19:04,585 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 21:19:04,601 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:19:04,601 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:19:04,601 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:19:04,601 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:19:04,601 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:19:04,601 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:19:04,601 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:19:04,602 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:19:04,609 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-05-21 21:19:04,625 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:19:04,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:04,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:04,635 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:04,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1415304500, now seen corresponding path program 1 times [2021-05-21 21:19:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:04,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736563666] [2021-05-21 21:19:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:04,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736563666] [2021-05-21 21:19:04,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736563666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:04,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:04,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:19:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349519371] [2021-05-21 21:19:04,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:19:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:19:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:19:04,868 INFO L87 Difference]: Start difference. First operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:04,952 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-05-21 21:19:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:19:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:19:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:04,976 INFO L225 Difference]: With dead ends: 410 [2021-05-21 21:19:04,976 INFO L226 Difference]: Without dead ends: 395 [2021-05-21 21:19:04,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:19:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-21 21:19:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-05-21 21:19:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-05-21 21:19:05,053 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-05-21 21:19:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:05,054 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-05-21 21:19:05,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-05-21 21:19:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:05,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:05,056 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:05,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:19:05,056 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash 435293552, now seen corresponding path program 1 times [2021-05-21 21:19:05,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:05,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930922164] [2021-05-21 21:19:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:05,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930922164] [2021-05-21 21:19:05,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930922164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055102367] [2021-05-21 21:19:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:19:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:05,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:19:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:05,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055102367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:05,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:05,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 21:19:05,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783749884] [2021-05-21 21:19:05,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:05,465 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:05,744 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-05-21 21:19:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:19:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:05,750 INFO L225 Difference]: With dead ends: 532 [2021-05-21 21:19:05,750 INFO L226 Difference]: Without dead ends: 532 [2021-05-21 21:19:05,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:19:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-21 21:19:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-05-21 21:19:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-05-21 21:19:05,778 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-05-21 21:19:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:05,779 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-05-21 21:19:05,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-05-21 21:19:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:05,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:05,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:05,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 21:19:05,988 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1894116080, now seen corresponding path program 2 times [2021-05-21 21:19:05,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:05,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766962037] [2021-05-21 21:19:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766962037] [2021-05-21 21:19:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766962037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104974586] [2021-05-21 21:19:06,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:06,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:06,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:06,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:19:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104974586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:06,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 21:19:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020596197] [2021-05-21 21:19:06,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:06,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:06,166 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:06,451 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-05-21 21:19:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:19:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:06,454 INFO L225 Difference]: With dead ends: 565 [2021-05-21 21:19:06,455 INFO L226 Difference]: Without dead ends: 565 [2021-05-21 21:19:06,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-21 21:19:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-05-21 21:19:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-05-21 21:19:06,470 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-05-21 21:19:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:06,470 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-05-21 21:19:06,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-05-21 21:19:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:06,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:06,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:06,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:06,697 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:06,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash 730755178, now seen corresponding path program 1 times [2021-05-21 21:19:06,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:06,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791581331] [2021-05-21 21:19:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:06,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791581331] [2021-05-21 21:19:06,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791581331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162095165] [2021-05-21 21:19:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:06,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:19:06,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162095165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:06,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 21:19:06,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045565989] [2021-05-21 21:19:06,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:19:06,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:19:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:06,845 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:06,905 INFO L93 Difference]: Finished difference Result 356 states and 997 transitions. [2021-05-21 21:19:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:19:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:06,908 INFO L225 Difference]: With dead ends: 356 [2021-05-21 21:19:06,908 INFO L226 Difference]: Without dead ends: 356 [2021-05-21 21:19:06,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-21 21:19:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 186. [2021-05-21 21:19:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-05-21 21:19:06,915 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-05-21 21:19:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:06,915 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-05-21 21:19:06,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-05-21 21:19:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:06,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:06,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:07,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:07,124 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1327749482, now seen corresponding path program 3 times [2021-05-21 21:19:07,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:07,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214519212] [2021-05-21 21:19:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:07,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:07,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214519212] [2021-05-21 21:19:07,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214519212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:07,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551766284] [2021-05-21 21:19:07,193 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 [2021-05-21 21:19:07,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:19:07,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:19:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:07,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551766284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:07,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:07,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 21:19:07,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150023466] [2021-05-21 21:19:07,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:07,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:07,327 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:07,557 INFO L93 Difference]: Finished difference Result 597 states and 1646 transitions. [2021-05-21 21:19:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:19:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:07,561 INFO L225 Difference]: With dead ends: 597 [2021-05-21 21:19:07,561 INFO L226 Difference]: Without dead ends: 597 [2021-05-21 21:19:07,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:19:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-21 21:19:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 186. [2021-05-21 21:19:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-05-21 21:19:07,570 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-05-21 21:19:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:07,571 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-05-21 21:19:07,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-05-21 21:19:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:07,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:07,572 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:07,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:07,792 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1644969426, now seen corresponding path program 1 times [2021-05-21 21:19:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:07,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892409505] [2021-05-21 21:19:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:07,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:07,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892409505] [2021-05-21 21:19:07,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892409505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:07,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:07,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:19:07,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584882608] [2021-05-21 21:19:07,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:19:07,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:19:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:19:07,856 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:07,929 INFO L93 Difference]: Finished difference Result 329 states and 915 transitions. [2021-05-21 21:19:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:19:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:07,932 INFO L225 Difference]: With dead ends: 329 [2021-05-21 21:19:07,932 INFO L226 Difference]: Without dead ends: 323 [2021-05-21 21:19:07,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:19:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-21 21:19:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 225. [2021-05-21 21:19:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.924107142857143) internal successors, (655), 224 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 655 transitions. [2021-05-21 21:19:07,940 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 655 transitions. Word has length 23 [2021-05-21 21:19:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:07,940 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 655 transitions. [2021-05-21 21:19:07,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 655 transitions. [2021-05-21 21:19:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:07,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:07,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:07,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:19:07,942 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1918692182, now seen corresponding path program 2 times [2021-05-21 21:19:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:07,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007725824] [2021-05-21 21:19:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:07,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:07,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007725824] [2021-05-21 21:19:07,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007725824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:07,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:07,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:19:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284700540] [2021-05-21 21:19:07,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:19:07,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:19:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:19:07,978 INFO L87 Difference]: Start difference. First operand 225 states and 655 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:08,019 INFO L93 Difference]: Finished difference Result 295 states and 825 transitions. [2021-05-21 21:19:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:19:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:08,022 INFO L225 Difference]: With dead ends: 295 [2021-05-21 21:19:08,022 INFO L226 Difference]: Without dead ends: 295 [2021-05-21 21:19:08,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:19:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-21 21:19:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2021-05-21 21:19:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9278846153846154) internal successors, (609), 208 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 609 transitions. [2021-05-21 21:19:08,029 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 609 transitions. Word has length 23 [2021-05-21 21:19:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:08,029 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 609 transitions. [2021-05-21 21:19:08,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 609 transitions. [2021-05-21 21:19:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:08,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:08,030 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:08,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 21:19:08,031 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:08,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1943824618, now seen corresponding path program 3 times [2021-05-21 21:19:08,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:08,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963017598] [2021-05-21 21:19:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:08,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:08,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963017598] [2021-05-21 21:19:08,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963017598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:08,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:08,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:19:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622858341] [2021-05-21 21:19:08,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:19:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:19:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:19:08,082 INFO L87 Difference]: Start difference. First operand 209 states and 609 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:08,151 INFO L93 Difference]: Finished difference Result 303 states and 837 transitions. [2021-05-21 21:19:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:19:08,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:08,153 INFO L225 Difference]: With dead ends: 303 [2021-05-21 21:19:08,153 INFO L226 Difference]: Without dead ends: 303 [2021-05-21 21:19:08,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:19:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-21 21:19:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 201. [2021-05-21 21:19:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.865) internal successors, (573), 200 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 573 transitions. [2021-05-21 21:19:08,161 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 573 transitions. Word has length 23 [2021-05-21 21:19:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:08,161 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 573 transitions. [2021-05-21 21:19:08,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 573 transitions. [2021-05-21 21:19:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:08,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:08,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:08,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 21:19:08,162 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2060210918, now seen corresponding path program 4 times [2021-05-21 21:19:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:08,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454053895] [2021-05-21 21:19:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:08,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:08,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454053895] [2021-05-21 21:19:08,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454053895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:08,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:08,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:19:08,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216205169] [2021-05-21 21:19:08,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:19:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:19:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:19:08,229 INFO L87 Difference]: Start difference. First operand 201 states and 573 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:08,325 INFO L93 Difference]: Finished difference Result 326 states and 884 transitions. [2021-05-21 21:19:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:19:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:08,327 INFO L225 Difference]: With dead ends: 326 [2021-05-21 21:19:08,328 INFO L226 Difference]: Without dead ends: 322 [2021-05-21 21:19:08,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-21 21:19:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 201. [2021-05-21 21:19:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.855) internal successors, (571), 200 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 571 transitions. [2021-05-21 21:19:08,354 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 571 transitions. Word has length 23 [2021-05-21 21:19:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:08,355 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 571 transitions. [2021-05-21 21:19:08,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 571 transitions. [2021-05-21 21:19:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:08,356 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:08,356 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:08,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 21:19:08,356 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 227810994, now seen corresponding path program 2 times [2021-05-21 21:19:08,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:08,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846843450] [2021-05-21 21:19:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:08,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846843450] [2021-05-21 21:19:08,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846843450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:08,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:08,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:19:08,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885376294] [2021-05-21 21:19:08,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:19:08,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:08,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:19:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:19:08,390 INFO L87 Difference]: Start difference. First operand 201 states and 571 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:08,463 INFO L93 Difference]: Finished difference Result 229 states and 638 transitions. [2021-05-21 21:19:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:19:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:08,465 INFO L225 Difference]: With dead ends: 229 [2021-05-21 21:19:08,465 INFO L226 Difference]: Without dead ends: 211 [2021-05-21 21:19:08,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-21 21:19:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 178. [2021-05-21 21:19:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-05-21 21:19:08,475 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-05-21 21:19:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:08,475 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-05-21 21:19:08,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-05-21 21:19:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:08,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:08,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:08,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 21:19:08,477 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash -961400090, now seen corresponding path program 5 times [2021-05-21 21:19:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:08,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628813479] [2021-05-21 21:19:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:08,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:08,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628813479] [2021-05-21 21:19:08,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628813479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:08,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:08,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:19:08,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707900785] [2021-05-21 21:19:08,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:19:08,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:19:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:19:08,529 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:08,630 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-05-21 21:19:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:19:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:08,633 INFO L225 Difference]: With dead ends: 331 [2021-05-21 21:19:08,633 INFO L226 Difference]: Without dead ends: 327 [2021-05-21 21:19:08,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-21 21:19:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-05-21 21:19:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-05-21 21:19:08,639 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-05-21 21:19:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:08,639 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-05-21 21:19:08,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-05-21 21:19:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:19:08,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:08,640 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:08,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 21:19:08,641 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 17157354, now seen corresponding path program 6 times [2021-05-21 21:19:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24710663] [2021-05-21 21:19:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:08,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:08,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24710663] [2021-05-21 21:19:08,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24710663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:19:08,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:19:08,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:19:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384337088] [2021-05-21 21:19:08,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:19:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:19:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:19:08,686 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:08,814 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-05-21 21:19:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:19:08,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:19:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:08,820 INFO L225 Difference]: With dead ends: 313 [2021-05-21 21:19:08,820 INFO L226 Difference]: Without dead ends: 313 [2021-05-21 21:19:08,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-21 21:19:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-05-21 21:19:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-05-21 21:19:08,834 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-05-21 21:19:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:08,835 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-05-21 21:19:08,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-05-21 21:19:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:19:08,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:08,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:08,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-21 21:19:08,838 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash 751961810, now seen corresponding path program 1 times [2021-05-21 21:19:08,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:08,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397767853] [2021-05-21 21:19:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:09,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:09,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397767853] [2021-05-21 21:19:09,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397767853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:09,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238871183] [2021-05-21 21:19:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 21:19:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:09,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:19:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:09,819 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-05-21 21:19:09,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 25 [2021-05-21 21:19:09,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:09,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:09,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:09,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:19:09,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-21 21:19:09,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:09,998 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-21 21:19:09,999 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-05-21 21:19:10,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:10,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:10,027 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-05-21 21:19:10,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 21 [2021-05-21 21:19:10,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:10,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:10,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:10,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:19:10,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-21 21:19:10,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:10,159 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-05-21 21:19:10,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-21 21:19:10,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:70 [2021-05-21 21:19:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:10,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238871183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:10,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:10,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:19:10,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518810948] [2021-05-21 21:19:10,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:19:10,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:19:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:10,279 INFO L87 Difference]: Start difference. First operand 182 states and 514 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) [2021-05-21 21:19:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:11,086 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-05-21 21:19:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:19:11,086 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 25 [2021-05-21 21:19:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:11,089 INFO L225 Difference]: With dead ends: 545 [2021-05-21 21:19:11,089 INFO L226 Difference]: Without dead ends: 515 [2021-05-21 21:19:11,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 971.3ms TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:19:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-05-21 21:19:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-05-21 21:19:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-05-21 21:19:11,098 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-05-21 21:19:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:11,099 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-05-21 21:19:11,099 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) [2021-05-21 21:19:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-05-21 21:19:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:19:11,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:11,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:11,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 21:19:11,309 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 758582462, now seen corresponding path program 2 times [2021-05-21 21:19:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:11,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052202691] [2021-05-21 21:19:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:11,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052202691] [2021-05-21 21:19:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052202691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306457248] [2021-05-21 21:19:11,684 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 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 [2021-05-21 21:19:11,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:11,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:11,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:19:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,903 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:19:11,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-05-21 21:19:11,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:11,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:19:11,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-05-21 21:19:11,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,975 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:19:11,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-05-21 21:19:11,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:11,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:19:11,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:19:11,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-05-21 21:19:12,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:19:12,052 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-05-21 21:19:12,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:19:12,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-05-21 21:19:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306457248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:12,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:12,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-21 21:19:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318864007] [2021-05-21 21:19:12,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 21:19:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 21:19:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:19:12,167 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2021-05-21 21:19:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:13,367 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-05-21 21:19:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:19:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 25 [2021-05-21 21:19:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:13,371 INFO L225 Difference]: With dead ends: 697 [2021-05-21 21:19:13,371 INFO L226 Difference]: Without dead ends: 682 [2021-05-21 21:19:13,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1356.9ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:19:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-05-21 21:19:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-05-21 21:19:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-05-21 21:19:13,381 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-05-21 21:19:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:13,382 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-05-21 21:19:13,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2021-05-21 21:19:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-05-21 21:19:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:19:13,383 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:13,383 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:13,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:13,597 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1762556338, now seen corresponding path program 3 times [2021-05-21 21:19:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:13,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629803496] [2021-05-21 21:19:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:14,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:14,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629803496] [2021-05-21 21:19:14,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629803496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:14,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394940069] [2021-05-21 21:19:14,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:19:14,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:19:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:19:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:14,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394940069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:14,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:14,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:19:14,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954768405] [2021-05-21 21:19:14,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:19:14,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:19:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:19:14,351 INFO L87 Difference]: Start difference. First operand 256 states and 768 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) [2021-05-21 21:19:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:14,556 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-05-21 21:19:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:19:14,557 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 25 [2021-05-21 21:19:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:14,559 INFO L225 Difference]: With dead ends: 450 [2021-05-21 21:19:14,559 INFO L226 Difference]: Without dead ends: 435 [2021-05-21 21:19:14,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-21 21:19:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-05-21 21:19:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-05-21 21:19:14,568 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-05-21 21:19:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:14,568 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-05-21 21:19:14,568 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) [2021-05-21 21:19:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-05-21 21:19:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:19:14,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:14,569 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:14,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:14,791 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1965066352, now seen corresponding path program 4 times [2021-05-21 21:19:14,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:14,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397443160] [2021-05-21 21:19:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:15,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397443160] [2021-05-21 21:19:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397443160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400411845] [2021-05-21 21:19:15,182 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 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 [2021-05-21 21:19:15,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:15,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:19:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:15,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400411845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:15,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:15,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:19:15,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861102552] [2021-05-21 21:19:15,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:19:15,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:19:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:19:15,474 INFO L87 Difference]: Start difference. First operand 280 states and 827 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) [2021-05-21 21:19:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:15,744 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-05-21 21:19:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:19:15,745 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 25 [2021-05-21 21:19:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:15,746 INFO L225 Difference]: With dead ends: 406 [2021-05-21 21:19:15,747 INFO L226 Difference]: Without dead ends: 391 [2021-05-21 21:19:15,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:19:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-21 21:19:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-05-21 21:19:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-05-21 21:19:15,754 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-05-21 21:19:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:15,755 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-05-21 21:19:15,755 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) [2021-05-21 21:19:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-05-21 21:19:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:19:15,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:15,756 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:15,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:15,957 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1336701998, now seen corresponding path program 1 times [2021-05-21 21:19:15,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:15,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775401124] [2021-05-21 21:19:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:16,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775401124] [2021-05-21 21:19:16,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775401124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:16,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634088924] [2021-05-21 21:19:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:16,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:19:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:16,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634088924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:16,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:16,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 21:19:16,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606500826] [2021-05-21 21:19:16,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:19:16,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:19:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:19:16,213 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:16,295 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-05-21 21:19:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:19:16,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:19:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:16,298 INFO L225 Difference]: With dead ends: 469 [2021-05-21 21:19:16,298 INFO L226 Difference]: Without dead ends: 454 [2021-05-21 21:19:16,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:19:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-21 21:19:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-05-21 21:19:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-05-21 21:19:16,306 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-05-21 21:19:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:16,306 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-05-21 21:19:16,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-05-21 21:19:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:19:16,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:16,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:16,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:16,529 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash -297591214, now seen corresponding path program 2 times [2021-05-21 21:19:16,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:16,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613244838] [2021-05-21 21:19:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:16,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613244838] [2021-05-21 21:19:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613244838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086612037] [2021-05-21 21:19:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:16,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:19:16,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:16,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086612037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:16,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:16,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 21:19:16,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755801276] [2021-05-21 21:19:16,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:19:16,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:19:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:19:16,776 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:16,838 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-05-21 21:19:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:19:16,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:19:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:16,841 INFO L225 Difference]: With dead ends: 491 [2021-05-21 21:19:16,841 INFO L226 Difference]: Without dead ends: 476 [2021-05-21 21:19:16,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:19:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-21 21:19:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-05-21 21:19:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-05-21 21:19:16,849 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-05-21 21:19:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:16,850 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-05-21 21:19:16,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-05-21 21:19:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:16,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:16,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:17,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:17,065 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash 127479732, now seen corresponding path program 5 times [2021-05-21 21:19:17,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:17,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549036880] [2021-05-21 21:19:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:17,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549036880] [2021-05-21 21:19:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549036880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639221166] [2021-05-21 21:19:17,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:17,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:19:17,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:17,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639221166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:17,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:17,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:19:17,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140563226] [2021-05-21 21:19:17,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:17,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:17,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:17,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:17,250 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:17,412 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-05-21 21:19:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:19:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:17,415 INFO L225 Difference]: With dead ends: 446 [2021-05-21 21:19:17,415 INFO L226 Difference]: Without dead ends: 446 [2021-05-21 21:19:17,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:19:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-21 21:19:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-05-21 21:19:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-05-21 21:19:17,425 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-05-21 21:19:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:17,425 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-05-21 21:19:17,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-05-21 21:19:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:17,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:17,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:17,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-21 21:19:17,649 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1011534832, now seen corresponding path program 6 times [2021-05-21 21:19:17,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:17,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636649280] [2021-05-21 21:19:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:17,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636649280] [2021-05-21 21:19:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636649280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965244872] [2021-05-21 21:19:17,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:17,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:17,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:17,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965244872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:17,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:17,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:17,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839114605] [2021-05-21 21:19:17,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:17,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:17,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:17,810 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:18,290 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-05-21 21:19:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:19:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:18,294 INFO L225 Difference]: With dead ends: 1017 [2021-05-21 21:19:18,294 INFO L226 Difference]: Without dead ends: 1017 [2021-05-21 21:19:18,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:19:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-05-21 21:19:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-05-21 21:19:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-05-21 21:19:18,311 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-05-21 21:19:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:18,311 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-05-21 21:19:18,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-05-21 21:19:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:18,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:18,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:18,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:18,535 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1961184076, now seen corresponding path program 1 times [2021-05-21 21:19:18,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:18,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485882314] [2021-05-21 21:19:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:18,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:18,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485882314] [2021-05-21 21:19:18,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485882314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:18,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059179381] [2021-05-21 21:19:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:18,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059179381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:18,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:18,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:18,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776774824] [2021-05-21 21:19:18,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:18,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:18,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:18,688 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:18,899 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-05-21 21:19:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:19:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:18,902 INFO L225 Difference]: With dead ends: 838 [2021-05-21 21:19:18,903 INFO L226 Difference]: Without dead ends: 832 [2021-05-21 21:19:18,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-05-21 21:19:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-05-21 21:19:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-05-21 21:19:18,921 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-05-21 21:19:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:18,921 INFO L482 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-05-21 21:19:18,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-05-21 21:19:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:18,923 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:18,923 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:19,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-21 21:19:19,137 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1602477532, now seen corresponding path program 2 times [2021-05-21 21:19:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:19,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072007305] [2021-05-21 21:19:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:19,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072007305] [2021-05-21 21:19:19,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072007305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056222071] [2021-05-21 21:19:19,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:19,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:19,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056222071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:19,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:19,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637954263] [2021-05-21 21:19:19,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:19,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:19,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:19,311 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:19,521 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-05-21 21:19:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:19:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:19,526 INFO L225 Difference]: With dead ends: 905 [2021-05-21 21:19:19,526 INFO L226 Difference]: Without dead ends: 905 [2021-05-21 21:19:19,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-05-21 21:19:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-05-21 21:19:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-05-21 21:19:19,544 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-05-21 21:19:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:19,545 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-05-21 21:19:19,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-05-21 21:19:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:19,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:19,546 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:19,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:19,765 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1743996268, now seen corresponding path program 7 times [2021-05-21 21:19:19,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:19,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656370040] [2021-05-21 21:19:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:19,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656370040] [2021-05-21 21:19:19,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656370040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309960090] [2021-05-21 21:19:19,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:19,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:19,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309960090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:19,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559842757] [2021-05-21 21:19:19,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:19,920 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:20,291 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-05-21 21:19:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:19:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:20,295 INFO L225 Difference]: With dead ends: 1149 [2021-05-21 21:19:20,295 INFO L226 Difference]: Without dead ends: 1145 [2021-05-21 21:19:20,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:19:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-05-21 21:19:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-05-21 21:19:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-05-21 21:19:20,313 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-05-21 21:19:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:20,313 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-05-21 21:19:20,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-05-21 21:19:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:20,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:20,314 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:20,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 21:19:20,530 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1159578392, now seen corresponding path program 3 times [2021-05-21 21:19:20,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:20,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883601900] [2021-05-21 21:19:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:20,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:20,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883601900] [2021-05-21 21:19:20,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883601900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:20,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805275995] [2021-05-21 21:19:20,577 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 [2021-05-21 21:19:20,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:19:20,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:20,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:20,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:20,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805275995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:20,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:20,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:20,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887998862] [2021-05-21 21:19:20,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:20,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:20,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:20,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:20,677 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:20,844 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-05-21 21:19:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:19:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:20,847 INFO L225 Difference]: With dead ends: 751 [2021-05-21 21:19:20,847 INFO L226 Difference]: Without dead ends: 751 [2021-05-21 21:19:20,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:19:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-05-21 21:19:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-05-21 21:19:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-05-21 21:19:20,860 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-05-21 21:19:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:20,860 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-05-21 21:19:20,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-05-21 21:19:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:20,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:20,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:21,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:21,081 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash -480090768, now seen corresponding path program 8 times [2021-05-21 21:19:21,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:21,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570671694] [2021-05-21 21:19:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:21,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570671694] [2021-05-21 21:19:21,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570671694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166307274] [2021-05-21 21:19:21,140 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 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 [2021-05-21 21:19:21,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:21,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:21,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:21,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166307274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:21,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:21,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:21,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387946898] [2021-05-21 21:19:21,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:21,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:21,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:21,261 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:21,451 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-05-21 21:19:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:19:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-05-21 21:19:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:21,454 INFO L225 Difference]: With dead ends: 983 [2021-05-21 21:19:21,455 INFO L226 Difference]: Without dead ends: 971 [2021-05-21 21:19:21,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:19:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-05-21 21:19:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-05-21 21:19:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-05-21 21:19:21,468 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-05-21 21:19:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:21,469 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-05-21 21:19:21,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-05-21 21:19:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:21,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:21,470 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:21,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:21,688 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1407034092, now seen corresponding path program 9 times [2021-05-21 21:19:21,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:21,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601412147] [2021-05-21 21:19:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:21,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601412147] [2021-05-21 21:19:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601412147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212574504] [2021-05-21 21:19:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:21,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:19:21,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:21,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212574504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:21,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:21,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:19:21,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934129819] [2021-05-21 21:19:21,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:21,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:21,844 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:22,033 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-05-21 21:19:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:19:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:22,037 INFO L225 Difference]: With dead ends: 983 [2021-05-21 21:19:22,037 INFO L226 Difference]: Without dead ends: 983 [2021-05-21 21:19:22,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:19:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-05-21 21:19:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-05-21 21:19:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-05-21 21:19:22,070 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-05-21 21:19:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:22,070 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-05-21 21:19:22,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-05-21 21:19:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:22,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:22,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:22,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:22,285 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:22,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2004028396, now seen corresponding path program 10 times [2021-05-21 21:19:22,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:22,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881830217] [2021-05-21 21:19:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:22,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881830217] [2021-05-21 21:19:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881830217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025687664] [2021-05-21 21:19:22,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:22,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:22,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:22,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025687664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:22,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:22,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540821497] [2021-05-21 21:19:22,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:22,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:22,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:22,455 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:22,958 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-05-21 21:19:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:19:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:22,966 INFO L225 Difference]: With dead ends: 1871 [2021-05-21 21:19:22,966 INFO L226 Difference]: Without dead ends: 1871 [2021-05-21 21:19:22,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:19:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-05-21 21:19:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-05-21 21:19:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-05-21 21:19:22,995 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-05-21 21:19:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:22,995 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-05-21 21:19:22,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-05-21 21:19:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:22,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:22,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:23,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:23,213 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1558477464, now seen corresponding path program 11 times [2021-05-21 21:19:23,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:23,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650804078] [2021-05-21 21:19:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:23,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:23,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650804078] [2021-05-21 21:19:23,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650804078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:23,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368469031] [2021-05-21 21:19:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:23,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:23,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:23,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:23,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368469031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:23,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:23,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:23,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518273268] [2021-05-21 21:19:23,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:23,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:23,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:23,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:23,386 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:23,862 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-05-21 21:19:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:19:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:23,867 INFO L225 Difference]: With dead ends: 1774 [2021-05-21 21:19:23,868 INFO L226 Difference]: Without dead ends: 1766 [2021-05-21 21:19:23,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:19:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-05-21 21:19:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-05-21 21:19:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-05-21 21:19:23,890 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-05-21 21:19:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-05-21 21:19:23,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-05-21 21:19:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:23,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:23,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:24,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-21 21:19:24,114 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1799894256, now seen corresponding path program 12 times [2021-05-21 21:19:24,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:24,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002316542] [2021-05-21 21:19:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:24,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002316542] [2021-05-21 21:19:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002316542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430202818] [2021-05-21 21:19:24,152 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 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 [2021-05-21 21:19:24,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:24,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430202818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:24,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:24,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:24,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391290014] [2021-05-21 21:19:24,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:24,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:24,277 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-05-21 21:19:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:24,796 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-05-21 21:19:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:19:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-05-21 21:19:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:24,805 INFO L225 Difference]: With dead ends: 1916 [2021-05-21 21:19:24,805 INFO L226 Difference]: Without dead ends: 1916 [2021-05-21 21:19:24,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:19:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-05-21 21:19:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-05-21 21:19:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-05-21 21:19:24,829 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-05-21 21:19:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:24,829 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-05-21 21:19:24,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-05-21 21:19:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-05-21 21:19:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:24,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:24,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:25,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:25,045 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1036250512, now seen corresponding path program 13 times [2021-05-21 21:19:25,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:25,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047131181] [2021-05-21 21:19:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:25,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047131181] [2021-05-21 21:19:25,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047131181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278157766] [2021-05-21 21:19:25,113 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 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 [2021-05-21 21:19:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:25,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:25,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:25,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278157766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:25,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:25,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:25,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289129110] [2021-05-21 21:19:25,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:25,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:25,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:25,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:25,243 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-05-21 21:19:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:25,721 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-05-21 21:19:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:19:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-05-21 21:19:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:25,724 INFO L225 Difference]: With dead ends: 1888 [2021-05-21 21:19:25,724 INFO L226 Difference]: Without dead ends: 1888 [2021-05-21 21:19:25,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:19:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-05-21 21:19:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-05-21 21:19:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-05-21 21:19:25,743 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-05-21 21:19:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:25,743 INFO L482 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-05-21 21:19:25,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-05-21 21:19:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-05-21 21:19:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:25,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:25,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:25,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:25,952 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 904089908, now seen corresponding path program 14 times [2021-05-21 21:19:25,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:25,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116048502] [2021-05-21 21:19:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:25,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:25,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116048502] [2021-05-21 21:19:25,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116048502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:25,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714008048] [2021-05-21 21:19:25,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:26,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:26,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714008048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:26,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:26,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:19:26,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553038244] [2021-05-21 21:19:26,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:26,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:26,107 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:19:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:26,274 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-05-21 21:19:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:19:26,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 27 [2021-05-21 21:19:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:26,276 INFO L225 Difference]: With dead ends: 912 [2021-05-21 21:19:26,276 INFO L226 Difference]: Without dead ends: 902 [2021-05-21 21:19:26,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:19:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-05-21 21:19:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-05-21 21:19:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-05-21 21:19:26,288 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-05-21 21:19:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:26,288 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-05-21 21:19:26,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:19:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-05-21 21:19:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:26,289 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:26,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:26,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-21 21:19:26,509 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash -285121176, now seen corresponding path program 15 times [2021-05-21 21:19:26,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:26,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831543081] [2021-05-21 21:19:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:26,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:26,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831543081] [2021-05-21 21:19:26,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831543081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:26,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192066506] [2021-05-21 21:19:26,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:26,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:19:26,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:26,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:26,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192066506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:26,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:26,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:26,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46770777] [2021-05-21 21:19:26,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:26,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:26,664 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:27,054 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-05-21 21:19:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:19:27,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:27,057 INFO L225 Difference]: With dead ends: 1623 [2021-05-21 21:19:27,057 INFO L226 Difference]: Without dead ends: 1615 [2021-05-21 21:19:27,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:19:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-05-21 21:19:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-05-21 21:19:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-05-21 21:19:27,076 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-05-21 21:19:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:27,077 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-05-21 21:19:27,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-05-21 21:19:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:27,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:27,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:27,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:27,300 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash 693436268, now seen corresponding path program 16 times [2021-05-21 21:19:27,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:27,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756874716] [2021-05-21 21:19:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:27,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:27,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756874716] [2021-05-21 21:19:27,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756874716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:27,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451371057] [2021-05-21 21:19:27,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:27,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:27,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451371057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:27,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:27,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:27,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069254021] [2021-05-21 21:19:27,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:27,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:27,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:27,462 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:27,892 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-05-21 21:19:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 21:19:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:27,895 INFO L225 Difference]: With dead ends: 1707 [2021-05-21 21:19:27,895 INFO L226 Difference]: Without dead ends: 1707 [2021-05-21 21:19:27,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:19:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-05-21 21:19:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-05-21 21:19:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-05-21 21:19:27,914 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-05-21 21:19:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:27,914 INFO L482 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-05-21 21:19:27,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-05-21 21:19:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:27,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:27,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:28,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-21 21:19:28,137 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 339248496, now seen corresponding path program 17 times [2021-05-21 21:19:28,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:28,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906466573] [2021-05-21 21:19:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:28,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:28,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906466573] [2021-05-21 21:19:28,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906466573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:28,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262259479] [2021-05-21 21:19:28,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:28,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:28,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:28,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:28,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262259479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:28,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:28,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:28,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150247514] [2021-05-21 21:19:28,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:28,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:28,250 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:28,472 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-05-21 21:19:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:19:28,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:28,475 INFO L225 Difference]: With dead ends: 1202 [2021-05-21 21:19:28,475 INFO L226 Difference]: Without dead ends: 1190 [2021-05-21 21:19:28,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-05-21 21:19:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-05-21 21:19:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-05-21 21:19:28,498 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-05-21 21:19:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:28,498 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-05-21 21:19:28,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-05-21 21:19:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:28,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:28,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:28,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 21:19:28,721 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1260950636, now seen corresponding path program 18 times [2021-05-21 21:19:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:28,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275650632] [2021-05-21 21:19:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:28,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:28,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275650632] [2021-05-21 21:19:28,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275650632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:28,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243328649] [2021-05-21 21:19:28,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:28,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:28,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:28,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:28,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243328649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:28,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:28,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:28,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063041607] [2021-05-21 21:19:28,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:28,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:28,841 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:29,113 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-05-21 21:19:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:19:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:29,117 INFO L225 Difference]: With dead ends: 1451 [2021-05-21 21:19:29,117 INFO L226 Difference]: Without dead ends: 1443 [2021-05-21 21:19:29,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:19:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-05-21 21:19:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-05-21 21:19:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-05-21 21:19:29,136 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-05-21 21:19:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:29,136 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-05-21 21:19:29,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-05-21 21:19:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:29,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:29,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:29,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:29,359 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:29,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459216, now seen corresponding path program 19 times [2021-05-21 21:19:29,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:29,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343782545] [2021-05-21 21:19:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:29,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:29,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343782545] [2021-05-21 21:19:29,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343782545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:29,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312847357] [2021-05-21 21:19:29,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:29,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:29,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312847357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:29,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:29,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982538303] [2021-05-21 21:19:29,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:29,513 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:29,902 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-05-21 21:19:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:19:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:29,905 INFO L225 Difference]: With dead ends: 1579 [2021-05-21 21:19:29,905 INFO L226 Difference]: Without dead ends: 1579 [2021-05-21 21:19:29,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:19:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-05-21 21:19:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-05-21 21:19:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-05-21 21:19:29,926 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-05-21 21:19:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:29,926 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-05-21 21:19:29,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-05-21 21:19:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:29,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:29,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:30,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:30,141 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947492, now seen corresponding path program 20 times [2021-05-21 21:19:30,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:30,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657567575] [2021-05-21 21:19:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:30,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:30,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657567575] [2021-05-21 21:19:30,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657567575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:30,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454756820] [2021-05-21 21:19:30,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:30,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:30,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:30,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454756820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:30,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:30,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:19:30,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406221986] [2021-05-21 21:19:30,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:30,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:30,277 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:30,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:30,552 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-05-21 21:19:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:19:30,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:30,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:30,554 INFO L225 Difference]: With dead ends: 1913 [2021-05-21 21:19:30,554 INFO L226 Difference]: Without dead ends: 1913 [2021-05-21 21:19:30,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:19:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-05-21 21:19:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-05-21 21:19:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-05-21 21:19:30,573 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-05-21 21:19:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:30,573 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-05-21 21:19:30,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-05-21 21:19:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:30,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:30,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:30,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:30,783 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1979075620, now seen corresponding path program 21 times [2021-05-21 21:19:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:30,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706015680] [2021-05-21 21:19:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:30,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:30,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706015680] [2021-05-21 21:19:30,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706015680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491806730] [2021-05-21 21:19:30,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:30,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:19:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:30,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491806730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:30,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:30,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:19:30,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158878613] [2021-05-21 21:19:30,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:30,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:30,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:30,929 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:19:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:31,197 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-05-21 21:19:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:19:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 27 [2021-05-21 21:19:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:31,199 INFO L225 Difference]: With dead ends: 1741 [2021-05-21 21:19:31,199 INFO L226 Difference]: Without dead ends: 1731 [2021-05-21 21:19:31,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:19:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-05-21 21:19:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-05-21 21:19:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-05-21 21:19:31,219 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-05-21 21:19:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:31,219 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-05-21 21:19:31,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:19:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-05-21 21:19:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:31,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:31,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:31,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:31,421 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:31,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1712063380, now seen corresponding path program 22 times [2021-05-21 21:19:31,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:31,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506213983] [2021-05-21 21:19:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:31,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:31,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506213983] [2021-05-21 21:19:31,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506213983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:31,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223821043] [2021-05-21 21:19:31,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:31,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:31,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223821043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:31,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:31,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:31,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722357972] [2021-05-21 21:19:31,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:31,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:31,562 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:31,905 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-05-21 21:19:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:19:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:31,908 INFO L225 Difference]: With dead ends: 1821 [2021-05-21 21:19:31,908 INFO L226 Difference]: Without dead ends: 1821 [2021-05-21 21:19:31,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-21 21:19:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-05-21 21:19:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-05-21 21:19:31,940 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-05-21 21:19:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:31,941 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-05-21 21:19:31,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-05-21 21:19:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:31,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:31,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:32,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:32,157 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash -406491114, now seen corresponding path program 23 times [2021-05-21 21:19:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:32,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77407074] [2021-05-21 21:19:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:32,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77407074] [2021-05-21 21:19:32,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77407074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231088490] [2021-05-21 21:19:32,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:32,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:32,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231088490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:32,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:32,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:19:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463128761] [2021-05-21 21:19:32,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:32,304 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:19:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:32,477 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-05-21 21:19:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:19:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 27 [2021-05-21 21:19:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:32,479 INFO L225 Difference]: With dead ends: 1342 [2021-05-21 21:19:32,479 INFO L226 Difference]: Without dead ends: 1311 [2021-05-21 21:19:32,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:19:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-05-21 21:19:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-05-21 21:19:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-05-21 21:19:32,492 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-05-21 21:19:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:32,492 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-05-21 21:19:32,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:19:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-05-21 21:19:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:32,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:32,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:32,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-21 21:19:32,694 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1176867492, now seen corresponding path program 24 times [2021-05-21 21:19:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:32,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110091553] [2021-05-21 21:19:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:32,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:32,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110091553] [2021-05-21 21:19:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110091553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:32,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377608763] [2021-05-21 21:19:32,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:32,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:32,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:32,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:32,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377608763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:32,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:32,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:32,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072409192] [2021-05-21 21:19:32,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:32,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:32,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:32,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:32,830 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:33,180 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-05-21 21:19:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:19:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:33,184 INFO L225 Difference]: With dead ends: 2119 [2021-05-21 21:19:33,184 INFO L226 Difference]: Without dead ends: 2115 [2021-05-21 21:19:33,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:19:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-05-21 21:19:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-05-21 21:19:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-05-21 21:19:33,203 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-05-21 21:19:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:33,203 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-05-21 21:19:33,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-05-21 21:19:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:33,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:33,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:33,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:33,406 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash -198310048, now seen corresponding path program 25 times [2021-05-21 21:19:33,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:33,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005158478] [2021-05-21 21:19:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:33,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:33,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005158478] [2021-05-21 21:19:33,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005158478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:33,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430321463] [2021-05-21 21:19:33,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:33,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430321463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:33,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:33,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:33,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827625078] [2021-05-21 21:19:33,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:33,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:33,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:33,586 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:33,999 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-05-21 21:19:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:19:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:34,002 INFO L225 Difference]: With dead ends: 2273 [2021-05-21 21:19:34,002 INFO L226 Difference]: Without dead ends: 2273 [2021-05-21 21:19:34,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:19:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-05-21 21:19:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-05-21 21:19:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-05-21 21:19:34,021 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-05-21 21:19:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:34,022 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-05-21 21:19:34,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-05-21 21:19:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:34,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:34,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:34,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-21 21:19:34,245 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:34,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2016185652, now seen corresponding path program 26 times [2021-05-21 21:19:34,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:34,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791556850] [2021-05-21 21:19:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:34,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791556850] [2021-05-21 21:19:34,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791556850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102901483] [2021-05-21 21:19:34,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:34,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:34,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:34,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:34,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102901483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:34,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:34,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:34,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467622908] [2021-05-21 21:19:34,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:34,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:34,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:34,400 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:34,668 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-05-21 21:19:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:19:34,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:34,671 INFO L225 Difference]: With dead ends: 2014 [2021-05-21 21:19:34,671 INFO L226 Difference]: Without dead ends: 2014 [2021-05-21 21:19:34,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:19:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-05-21 21:19:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-05-21 21:19:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-05-21 21:19:34,688 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-05-21 21:19:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:34,688 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-05-21 21:19:34,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-05-21 21:19:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:34,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:34,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:34,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:34,893 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -499902228, now seen corresponding path program 27 times [2021-05-21 21:19:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:34,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574053527] [2021-05-21 21:19:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:34,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:34,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574053527] [2021-05-21 21:19:34,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574053527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:34,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108128873] [2021-05-21 21:19:34,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:34,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:19:34,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:35,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108128873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:35,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:35,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:19:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289904455] [2021-05-21 21:19:35,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:35,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:35,002 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:35,230 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-05-21 21:19:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:19:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-05-21 21:19:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:35,233 INFO L225 Difference]: With dead ends: 1776 [2021-05-21 21:19:35,233 INFO L226 Difference]: Without dead ends: 1764 [2021-05-21 21:19:35,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-05-21 21:19:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-05-21 21:19:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-05-21 21:19:35,274 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-05-21 21:19:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:35,275 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-05-21 21:19:35,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-05-21 21:19:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:35,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:35,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:35,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-21 21:19:35,493 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1595195728, now seen corresponding path program 28 times [2021-05-21 21:19:35,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:35,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974436230] [2021-05-21 21:19:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:35,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:35,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974436230] [2021-05-21 21:19:35,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974436230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:35,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204731798] [2021-05-21 21:19:35,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:35,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:35,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204731798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:35,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:35,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:19:35,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936733517] [2021-05-21 21:19:35,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:35,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:35,629 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:35,912 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-05-21 21:19:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:19:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-05-21 21:19:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:35,914 INFO L225 Difference]: With dead ends: 1940 [2021-05-21 21:19:35,914 INFO L226 Difference]: Without dead ends: 1940 [2021-05-21 21:19:35,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:19:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-05-21 21:19:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-05-21 21:19:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-05-21 21:19:35,933 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-05-21 21:19:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:35,933 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-05-21 21:19:35,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-05-21 21:19:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:35,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:35,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:36,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-21 21:19:36,136 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1507209712, now seen corresponding path program 3 times [2021-05-21 21:19:36,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:36,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254460374] [2021-05-21 21:19:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:36,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254460374] [2021-05-21 21:19:36,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254460374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344021937] [2021-05-21 21:19:36,171 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 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 [2021-05-21 21:19:36,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:19:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:36,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344021937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:36,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:36,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:36,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870813910] [2021-05-21 21:19:36,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:36,293 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:36,549 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-05-21 21:19:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:19:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:36,551 INFO L225 Difference]: With dead ends: 1759 [2021-05-21 21:19:36,551 INFO L226 Difference]: Without dead ends: 1759 [2021-05-21 21:19:36,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:19:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-05-21 21:19:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-05-21 21:19:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-05-21 21:19:36,571 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-05-21 21:19:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:36,571 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-05-21 21:19:36,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-05-21 21:19:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:36,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:36,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:36,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 21:19:36,794 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 877590964, now seen corresponding path program 4 times [2021-05-21 21:19:36,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:36,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283618601] [2021-05-21 21:19:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:36,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:36,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283618601] [2021-05-21 21:19:36,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283618601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:36,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901891158] [2021-05-21 21:19:36,820 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 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 [2021-05-21 21:19:36,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:36,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:36,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:36,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:36,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901891158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:36,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:36,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:19:36,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218778689] [2021-05-21 21:19:36,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:19:36,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:19:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:36,898 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:37,012 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-05-21 21:19:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:19:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:37,022 INFO L225 Difference]: With dead ends: 1872 [2021-05-21 21:19:37,022 INFO L226 Difference]: Without dead ends: 1854 [2021-05-21 21:19:37,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:19:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-05-21 21:19:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-05-21 21:19:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-05-21 21:19:37,041 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-05-21 21:19:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:37,041 INFO L482 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-05-21 21:19:37,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-05-21 21:19:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:37,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:37,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:37,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 21:19:37,244 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash 118622872, now seen corresponding path program 5 times [2021-05-21 21:19:37,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:37,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003895875] [2021-05-21 21:19:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:37,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003895875] [2021-05-21 21:19:37,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003895875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247545023] [2021-05-21 21:19:37,277 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 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 [2021-05-21 21:19:37,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:37,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247545023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:37,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 21:19:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759931784] [2021-05-21 21:19:37,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:19:37,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:37,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:19:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:37,385 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:37,544 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-05-21 21:19:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:19:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:37,548 INFO L225 Difference]: With dead ends: 2133 [2021-05-21 21:19:37,548 INFO L226 Difference]: Without dead ends: 2133 [2021-05-21 21:19:37,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-05-21 21:19:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-05-21 21:19:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-05-21 21:19:37,580 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-05-21 21:19:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:37,580 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-05-21 21:19:37,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-05-21 21:19:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:37,583 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:37,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:37,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 21:19:37,805 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:37,806 INFO L82 PathProgramCache]: Analyzing trace with hash 260141608, now seen corresponding path program 6 times [2021-05-21 21:19:37,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:37,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157477004] [2021-05-21 21:19:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:37,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157477004] [2021-05-21 21:19:37,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157477004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515040493] [2021-05-21 21:19:37,844 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 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 [2021-05-21 21:19:37,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:19:37,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515040493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:37,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 21:19:37,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220688304] [2021-05-21 21:19:37,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:37,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:37,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:37,952 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:38,167 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-05-21 21:19:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:19:38,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:38,170 INFO L225 Difference]: With dead ends: 2050 [2021-05-21 21:19:38,170 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 21:19:38,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 21:19:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-05-21 21:19:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-05-21 21:19:38,190 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-05-21 21:19:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:38,190 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-05-21 21:19:38,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-05-21 21:19:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:38,192 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:38,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:38,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-21 21:19:38,392 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1708393328, now seen corresponding path program 7 times [2021-05-21 21:19:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:38,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438715119] [2021-05-21 21:19:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:38,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:38,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438715119] [2021-05-21 21:19:38,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438715119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:38,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175871261] [2021-05-21 21:19:38,426 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 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 [2021-05-21 21:19:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:38,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:38,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175871261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:38,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:38,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 21:19:38,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421421407] [2021-05-21 21:19:38,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:38,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:38,524 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:38,782 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-05-21 21:19:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:19:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:38,785 INFO L225 Difference]: With dead ends: 2257 [2021-05-21 21:19:38,785 INFO L226 Difference]: Without dead ends: 2257 [2021-05-21 21:19:38,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:19:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-05-21 21:19:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-05-21 21:19:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-05-21 21:19:38,814 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-05-21 21:19:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:38,814 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-05-21 21:19:38,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-05-21 21:19:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:38,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:38,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:39,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:39,033 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1264325580, now seen corresponding path program 8 times [2021-05-21 21:19:39,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:39,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111504256] [2021-05-21 21:19:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:39,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:39,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111504256] [2021-05-21 21:19:39,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111504256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:39,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834863949] [2021-05-21 21:19:39,064 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 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 [2021-05-21 21:19:39,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:39,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834863949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:39,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:39,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 21:19:39,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620200079] [2021-05-21 21:19:39,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:19:39,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:19:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:39,178 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:39,349 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-05-21 21:19:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:19:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:39,354 INFO L225 Difference]: With dead ends: 2263 [2021-05-21 21:19:39,354 INFO L226 Difference]: Without dead ends: 2257 [2021-05-21 21:19:39,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-05-21 21:19:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-05-21 21:19:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-05-21 21:19:39,386 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-05-21 21:19:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:39,386 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-05-21 21:19:39,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-05-21 21:19:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:39,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:39,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:39,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:39,611 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1995631268, now seen corresponding path program 9 times [2021-05-21 21:19:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:39,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212222806] [2021-05-21 21:19:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:39,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212222806] [2021-05-21 21:19:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212222806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415169587] [2021-05-21 21:19:39,639 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 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 [2021-05-21 21:19:39,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:19:39,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:39,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415169587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:39,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:39,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 21:19:39,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106695559] [2021-05-21 21:19:39,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:19:39,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:19:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:39,733 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:39,875 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-05-21 21:19:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:19:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:39,878 INFO L225 Difference]: With dead ends: 2415 [2021-05-21 21:19:39,878 INFO L226 Difference]: Without dead ends: 2415 [2021-05-21 21:19:39,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:19:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-05-21 21:19:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-05-21 21:19:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-05-21 21:19:39,899 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-05-21 21:19:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:39,899 INFO L482 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-05-21 21:19:39,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-05-21 21:19:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:39,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:39,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:40,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 21:19:40,101 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:40,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1854112532, now seen corresponding path program 10 times [2021-05-21 21:19:40,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:40,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481983064] [2021-05-21 21:19:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:40,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481983064] [2021-05-21 21:19:40,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481983064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671049572] [2021-05-21 21:19:40,156 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 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 [2021-05-21 21:19:40,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:40,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:40,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:40,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671049572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:40,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:40,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 21:19:40,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398731850] [2021-05-21 21:19:40,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:40,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:40,254 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:40,509 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-05-21 21:19:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:19:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:40,512 INFO L225 Difference]: With dead ends: 2204 [2021-05-21 21:19:40,512 INFO L226 Difference]: Without dead ends: 2200 [2021-05-21 21:19:40,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-05-21 21:19:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-05-21 21:19:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-05-21 21:19:40,539 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-05-21 21:19:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:40,539 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-05-21 21:19:40,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-05-21 21:19:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:40,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:40,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:40,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:40,763 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1856436888, now seen corresponding path program 11 times [2021-05-21 21:19:40,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:40,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090887018] [2021-05-21 21:19:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:40,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090887018] [2021-05-21 21:19:40,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090887018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237540684] [2021-05-21 21:19:40,792 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 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 [2021-05-21 21:19:40,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:40,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237540684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:40,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:40,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:19:40,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339159947] [2021-05-21 21:19:40,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:19:40,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:19:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:19:40,868 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:41,005 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-05-21 21:19:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:19:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:41,007 INFO L225 Difference]: With dead ends: 2022 [2021-05-21 21:19:41,007 INFO L226 Difference]: Without dead ends: 2022 [2021-05-21 21:19:41,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-05-21 21:19:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-05-21 21:19:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-05-21 21:19:41,026 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-05-21 21:19:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:41,026 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-05-21 21:19:41,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-05-21 21:19:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:41,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:41,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:41,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-21 21:19:41,242 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 216767728, now seen corresponding path program 12 times [2021-05-21 21:19:41,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:41,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305701139] [2021-05-21 21:19:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:41,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305701139] [2021-05-21 21:19:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305701139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214433174] [2021-05-21 21:19:41,277 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 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 [2021-05-21 21:19:41,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:41,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:41,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214433174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:41,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:41,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:41,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778064086] [2021-05-21 21:19:41,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:41,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:41,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:41,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:41,394 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:41,627 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-05-21 21:19:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:19:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-05-21 21:19:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:41,631 INFO L225 Difference]: With dead ends: 2124 [2021-05-21 21:19:41,631 INFO L226 Difference]: Without dead ends: 2112 [2021-05-21 21:19:41,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:19:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-05-21 21:19:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-05-21 21:19:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-05-21 21:19:41,659 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-05-21 21:19:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:41,660 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-05-21 21:19:41,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-05-21 21:19:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:41,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:41,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:41,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:41,877 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash -670090772, now seen corresponding path program 4 times [2021-05-21 21:19:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583185518] [2021-05-21 21:19:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:41,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:41,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583185518] [2021-05-21 21:19:41,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583185518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:41,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157744460] [2021-05-21 21:19:41,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:41,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:42,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157744460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:42,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:42,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:42,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420859187] [2021-05-21 21:19:42,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:42,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:42,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:42,002 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:42,258 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-05-21 21:19:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:19:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:42,261 INFO L225 Difference]: With dead ends: 2332 [2021-05-21 21:19:42,261 INFO L226 Difference]: Without dead ends: 2320 [2021-05-21 21:19:42,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-05-21 21:19:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-05-21 21:19:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-05-21 21:19:42,284 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-05-21 21:19:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:42,284 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-05-21 21:19:42,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-05-21 21:19:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:42,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:42,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:42,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 21:19:42,500 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:42,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1401396460, now seen corresponding path program 5 times [2021-05-21 21:19:42,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:42,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80913581] [2021-05-21 21:19:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:42,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:42,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80913581] [2021-05-21 21:19:42,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80913581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:42,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480926257] [2021-05-21 21:19:42,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:42,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:42,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:42,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480926257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:42,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:42,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401037534] [2021-05-21 21:19:42,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:42,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:42,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:42,616 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:42,888 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-05-21 21:19:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:19:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:42,891 INFO L225 Difference]: With dead ends: 2490 [2021-05-21 21:19:42,891 INFO L226 Difference]: Without dead ends: 2490 [2021-05-21 21:19:42,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-21 21:19:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-05-21 21:19:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-05-21 21:19:42,913 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-05-21 21:19:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:42,913 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-05-21 21:19:42,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-05-21 21:19:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:42,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:42,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:43,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 21:19:43,129 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1810785004, now seen corresponding path program 13 times [2021-05-21 21:19:43,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:43,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522858270] [2021-05-21 21:19:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:43,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:43,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522858270] [2021-05-21 21:19:43,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522858270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:43,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954775804] [2021-05-21 21:19:43,171 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 [2021-05-21 21:19:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:43,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954775804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:43,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:43,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:43,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671729116] [2021-05-21 21:19:43,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:43,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:43,279 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:43,609 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-05-21 21:19:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:19:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:43,613 INFO L225 Difference]: With dead ends: 2497 [2021-05-21 21:19:43,613 INFO L226 Difference]: Without dead ends: 2497 [2021-05-21 21:19:43,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:19:43,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-05-21 21:19:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-05-21 21:19:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-05-21 21:19:43,654 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-05-21 21:19:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:43,654 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-05-21 21:19:43,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-05-21 21:19:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:43,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:43,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:43,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 21:19:43,873 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash -168744536, now seen corresponding path program 14 times [2021-05-21 21:19:43,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:43,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851796365] [2021-05-21 21:19:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:43,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851796365] [2021-05-21 21:19:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851796365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251180427] [2021-05-21 21:19:43,910 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 [2021-05-21 21:19:43,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:44,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251180427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:44,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:44,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:44,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714530245] [2021-05-21 21:19:44,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:44,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:44,027 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:44,542 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-05-21 21:19:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:19:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:44,546 INFO L225 Difference]: With dead ends: 2724 [2021-05-21 21:19:44,546 INFO L226 Difference]: Without dead ends: 2724 [2021-05-21 21:19:44,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:19:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-05-21 21:19:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-05-21 21:19:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-05-21 21:19:44,568 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-05-21 21:19:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:44,568 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-05-21 21:19:44,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-05-21 21:19:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:44,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:44,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:44,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 21:19:44,771 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash 563716900, now seen corresponding path program 15 times [2021-05-21 21:19:44,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:44,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187705866] [2021-05-21 21:19:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:44,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:44,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187705866] [2021-05-21 21:19:44,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187705866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:44,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990167663] [2021-05-21 21:19:44,803 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 [2021-05-21 21:19:44,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:19:44,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:44,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990167663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:44,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:44,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:44,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84510404] [2021-05-21 21:19:44,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:44,912 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:45,337 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-05-21 21:19:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:19:45,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:45,340 INFO L225 Difference]: With dead ends: 2582 [2021-05-21 21:19:45,340 INFO L226 Difference]: Without dead ends: 2578 [2021-05-21 21:19:45,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:19:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-05-21 21:19:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-05-21 21:19:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-05-21 21:19:45,361 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-05-21 21:19:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:45,362 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-05-21 21:19:45,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-05-21 21:19:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:45,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:45,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:45,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:45,564 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1088595216, now seen corresponding path program 16 times [2021-05-21 21:19:45,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:45,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805311998] [2021-05-21 21:19:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:45,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:45,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805311998] [2021-05-21 21:19:45,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805311998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:45,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618070545] [2021-05-21 21:19:45,597 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 [2021-05-21 21:19:45,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618070545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:45,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:45,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960898479] [2021-05-21 21:19:45,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:45,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:45,690 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-05-21 21:19:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:46,002 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-05-21 21:19:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:19:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:46,005 INFO L225 Difference]: With dead ends: 2411 [2021-05-21 21:19:46,005 INFO L226 Difference]: Without dead ends: 2411 [2021-05-21 21:19:46,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-05-21 21:19:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-05-21 21:19:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-05-21 21:19:46,025 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-05-21 21:19:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:46,025 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-05-21 21:19:46,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-05-21 21:19:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-05-21 21:19:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:46,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:46,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:46,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-21 21:19:46,228 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1331852852, now seen corresponding path program 6 times [2021-05-21 21:19:46,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:46,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760262269] [2021-05-21 21:19:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:46,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760262269] [2021-05-21 21:19:46,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760262269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787892748] [2021-05-21 21:19:46,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:46,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:19:46,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:46,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:46,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787892748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22706066] [2021-05-21 21:19:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:46,341 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:46,556 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-05-21 21:19:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:19:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:46,558 INFO L225 Difference]: With dead ends: 1987 [2021-05-21 21:19:46,558 INFO L226 Difference]: Without dead ends: 1975 [2021-05-21 21:19:46,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:19:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-05-21 21:19:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-05-21 21:19:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-05-21 21:19:46,588 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-05-21 21:19:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:46,588 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-05-21 21:19:46,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-05-21 21:19:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:46,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:46,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:46,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 21:19:46,791 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:46,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1010707988, now seen corresponding path program 7 times [2021-05-21 21:19:46,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:46,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674242657] [2021-05-21 21:19:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674242657] [2021-05-21 21:19:46,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674242657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587386900] [2021-05-21 21:19:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587386900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:46,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576115845] [2021-05-21 21:19:46,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:46,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:46,910 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2021-05-21 21:19:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:47,138 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-05-21 21:19:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:19:47,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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 27 [2021-05-21 21:19:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:47,140 INFO L225 Difference]: With dead ends: 1951 [2021-05-21 21:19:47,141 INFO L226 Difference]: Without dead ends: 1923 [2021-05-21 21:19:47,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:19:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-05-21 21:19:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-05-21 21:19:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-05-21 21:19:47,160 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-05-21 21:19:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:47,160 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-05-21 21:19:47,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2021-05-21 21:19:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-05-21 21:19:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:47,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:47,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:47,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:47,363 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122076, now seen corresponding path program 8 times [2021-05-21 21:19:47,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:47,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385666523] [2021-05-21 21:19:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:47,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385666523] [2021-05-21 21:19:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385666523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973502890] [2021-05-21 21:19:47,389 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 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 [2021-05-21 21:19:47,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:47,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:47,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973502890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:47,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:47,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:19:47,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962128291] [2021-05-21 21:19:47,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:47,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:47,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:47,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:47,481 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:47,673 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-05-21 21:19:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:19:47,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-05-21 21:19:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:47,677 INFO L225 Difference]: With dead ends: 2417 [2021-05-21 21:19:47,677 INFO L226 Difference]: Without dead ends: 2417 [2021-05-21 21:19:47,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-05-21 21:19:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-05-21 21:19:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-05-21 21:19:47,703 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-05-21 21:19:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:47,703 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-05-21 21:19:47,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-05-21 21:19:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:47,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:47,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:47,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:47,921 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash -782245740, now seen corresponding path program 9 times [2021-05-21 21:19:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:47,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045701688] [2021-05-21 21:19:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:47,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:47,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045701688] [2021-05-21 21:19:47,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045701688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:47,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838026606] [2021-05-21 21:19:47,948 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 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 [2021-05-21 21:19:47,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:19:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:48,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838026606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:48,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:48,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:19:48,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630212180] [2021-05-21 21:19:48,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:48,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:48,030 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:48,249 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-05-21 21:19:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:19:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-05-21 21:19:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:48,252 INFO L225 Difference]: With dead ends: 2191 [2021-05-21 21:19:48,252 INFO L226 Difference]: Without dead ends: 2170 [2021-05-21 21:19:48,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:19:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-05-21 21:19:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-05-21 21:19:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-05-21 21:19:48,272 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-05-21 21:19:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:48,272 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-05-21 21:19:48,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-05-21 21:19:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:48,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:48,275 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:48,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:48,475 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1171437904, now seen corresponding path program 10 times [2021-05-21 21:19:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:48,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829701085] [2021-05-21 21:19:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:48,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:48,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829701085] [2021-05-21 21:19:48,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829701085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:48,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330139619] [2021-05-21 21:19:48,509 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 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 [2021-05-21 21:19:48,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:48,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330139619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:48,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:48,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:19:48,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305325026] [2021-05-21 21:19:48,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:48,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:48,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:48,587 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:48,753 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-05-21 21:19:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:19:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:48,755 INFO L225 Difference]: With dead ends: 1790 [2021-05-21 21:19:48,755 INFO L226 Difference]: Without dead ends: 1790 [2021-05-21 21:19:48,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:19:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-05-21 21:19:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-05-21 21:19:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-05-21 21:19:48,771 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-05-21 21:19:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:48,772 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-05-21 21:19:48,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-05-21 21:19:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:48,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:48,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:48,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-05-21 21:19:48,974 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2112049896, now seen corresponding path program 11 times [2021-05-21 21:19:48,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:48,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117608171] [2021-05-21 21:19:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:49,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:49,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117608171] [2021-05-21 21:19:49,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117608171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:49,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910725978] [2021-05-21 21:19:49,000 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 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 [2021-05-21 21:19:49,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:49,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:49,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:49,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910725978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:49,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:49,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:19:49,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243555096] [2021-05-21 21:19:49,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:49,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:49,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:49,076 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:49,248 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-05-21 21:19:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:19:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-05-21 21:19:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:49,252 INFO L225 Difference]: With dead ends: 2556 [2021-05-21 21:19:49,252 INFO L226 Difference]: Without dead ends: 2556 [2021-05-21 21:19:49,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-05-21 21:19:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-05-21 21:19:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-05-21 21:19:49,284 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-05-21 21:19:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:49,284 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-05-21 21:19:49,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-05-21 21:19:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:49,288 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:49,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-21 21:19:49,509 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash -523450416, now seen corresponding path program 12 times [2021-05-21 21:19:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656439286] [2021-05-21 21:19:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:49,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:49,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656439286] [2021-05-21 21:19:49,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656439286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:49,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137773313] [2021-05-21 21:19:49,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:49,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:19:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:19:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:49,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137773313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:49,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:49,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:19:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170375651] [2021-05-21 21:19:49,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:19:49,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:19:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:19:49,641 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:49,821 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-05-21 21:19:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:19:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-05-21 21:19:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:49,824 INFO L225 Difference]: With dead ends: 2232 [2021-05-21 21:19:49,824 INFO L226 Difference]: Without dead ends: 2211 [2021-05-21 21:19:49,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-21 21:19:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-05-21 21:19:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-05-21 21:19:49,859 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-05-21 21:19:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:49,859 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-05-21 21:19:49,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-05-21 21:19:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-05-21 21:19:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:49,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:49,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:50,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 21:19:50,062 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1318431600, now seen corresponding path program 17 times [2021-05-21 21:19:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:50,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234377281] [2021-05-21 21:19:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:50,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:50,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234377281] [2021-05-21 21:19:50,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234377281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:50,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785154897] [2021-05-21 21:19:50,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:50,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:50,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:50,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785154897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:50,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:50,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:50,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393448438] [2021-05-21 21:19:50,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:50,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:50,206 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:50,753 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-05-21 21:19:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:19:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:50,758 INFO L225 Difference]: With dead ends: 3478 [2021-05-21 21:19:50,758 INFO L226 Difference]: Without dead ends: 3478 [2021-05-21 21:19:50,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:19:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-05-21 21:19:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-05-21 21:19:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-05-21 21:19:50,802 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-05-21 21:19:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:50,802 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-05-21 21:19:50,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-05-21 21:19:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:50,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:50,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:51,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 21:19:51,021 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2050893036, now seen corresponding path program 18 times [2021-05-21 21:19:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:51,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738188880] [2021-05-21 21:19:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:51,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:51,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738188880] [2021-05-21 21:19:51,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738188880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:51,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223641212] [2021-05-21 21:19:51,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:51,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:51,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:51,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223641212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:51,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:51,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:19:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879976403] [2021-05-21 21:19:51,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:19:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:19:51,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:19:51,168 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:51,637 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-05-21 21:19:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:19:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:51,644 INFO L225 Difference]: With dead ends: 3323 [2021-05-21 21:19:51,644 INFO L226 Difference]: Without dead ends: 3319 [2021-05-21 21:19:51,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:19:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-05-21 21:19:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-05-21 21:19:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-05-21 21:19:51,674 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-05-21 21:19:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:51,674 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-05-21 21:19:51,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-05-21 21:19:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:51,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:51,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:51,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 21:19:51,877 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash -173194000, now seen corresponding path program 19 times [2021-05-21 21:19:51,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:51,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317587273] [2021-05-21 21:19:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:51,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:51,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317587273] [2021-05-21 21:19:51,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317587273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:51,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465210929] [2021-05-21 21:19:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:51,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:52,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465210929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:52,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:52,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:19:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282153462] [2021-05-21 21:19:52,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:52,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:52,011 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:52,372 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-05-21 21:19:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:19:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-05-21 21:19:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:52,376 INFO L225 Difference]: With dead ends: 3041 [2021-05-21 21:19:52,376 INFO L226 Difference]: Without dead ends: 3029 [2021-05-21 21:19:52,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:19:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-05-21 21:19:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-05-21 21:19:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-05-21 21:19:52,405 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-05-21 21:19:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:52,405 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-05-21 21:19:52,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-05-21 21:19:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:52,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:52,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:52,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:52,608 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2106791024, now seen corresponding path program 20 times [2021-05-21 21:19:52,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:52,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632641703] [2021-05-21 21:19:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:52,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:52,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632641703] [2021-05-21 21:19:52,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632641703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:52,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312606710] [2021-05-21 21:19:52,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:52,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:52,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:52,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312606710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:52,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:52,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 21:19:52,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267737172] [2021-05-21 21:19:52,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:52,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:52,750 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:53,274 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-05-21 21:19:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 21:19:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-05-21 21:19:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:53,279 INFO L225 Difference]: With dead ends: 4165 [2021-05-21 21:19:53,279 INFO L226 Difference]: Without dead ends: 4165 [2021-05-21 21:19:53,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:19:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-05-21 21:19:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-05-21 21:19:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-05-21 21:19:53,314 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-05-21 21:19:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:53,314 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-05-21 21:19:53,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-05-21 21:19:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-05-21 21:19:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:53,317 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:53,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:53,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-21 21:19:53,517 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash -729353744, now seen corresponding path program 21 times [2021-05-21 21:19:53,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:53,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72645375] [2021-05-21 21:19:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:53,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72645375] [2021-05-21 21:19:53,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72645375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187581955] [2021-05-21 21:19:53,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:19:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:53,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187581955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:53,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:53,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 21:19:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455124693] [2021-05-21 21:19:53,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:19:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:19:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:19:53,690 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:54,219 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-05-21 21:19:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 21:19:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:54,224 INFO L225 Difference]: With dead ends: 4184 [2021-05-21 21:19:54,224 INFO L226 Difference]: Without dead ends: 4184 [2021-05-21 21:19:54,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:19:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-05-21 21:19:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-05-21 21:19:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-05-21 21:19:54,260 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-05-21 21:19:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:54,260 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-05-21 21:19:54,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-05-21 21:19:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:54,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:54,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:54,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 21:19:54,463 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash 21775592, now seen corresponding path program 22 times [2021-05-21 21:19:54,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:54,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999258983] [2021-05-21 21:19:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:54,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:54,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999258983] [2021-05-21 21:19:54,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999258983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:54,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960794062] [2021-05-21 21:19:54,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:54,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960794062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:54,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:54,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-21 21:19:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104251907] [2021-05-21 21:19:54,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:54,578 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:55,027 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-05-21 21:19:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 21:19:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:55,033 INFO L225 Difference]: With dead ends: 3911 [2021-05-21 21:19:55,033 INFO L226 Difference]: Without dead ends: 3907 [2021-05-21 21:19:55,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:19:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-05-21 21:19:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-05-21 21:19:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-05-21 21:19:55,069 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-05-21 21:19:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:55,069 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-05-21 21:19:55,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-05-21 21:19:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:55,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:55,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:55,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 21:19:55,275 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:55,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:55,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1000333036, now seen corresponding path program 23 times [2021-05-21 21:19:55,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:55,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55914611] [2021-05-21 21:19:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:55,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:55,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55914611] [2021-05-21 21:19:55,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55914611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:55,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409072039] [2021-05-21 21:19:55,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:55,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:19:55,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409072039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:55,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-21 21:19:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585407139] [2021-05-21 21:19:55,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:55,401 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:55,852 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-05-21 21:19:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:19:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:55,857 INFO L225 Difference]: With dead ends: 4058 [2021-05-21 21:19:55,857 INFO L226 Difference]: Without dead ends: 4058 [2021-05-21 21:19:55,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:19:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-05-21 21:19:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-05-21 21:19:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-05-21 21:19:55,892 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-05-21 21:19:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:55,892 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-05-21 21:19:55,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-05-21 21:19:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:55,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:55,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:56,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:56,095 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash 646145264, now seen corresponding path program 24 times [2021-05-21 21:19:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:56,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077149340] [2021-05-21 21:19:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:56,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:56,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077149340] [2021-05-21 21:19:56,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077149340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:56,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178779816] [2021-05-21 21:19:56,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:56,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:19:56,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:56,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:56,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:56,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178779816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:56,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:56,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:56,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648951640] [2021-05-21 21:19:56,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:56,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:56,233 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:56,587 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-05-21 21:19:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:19:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:56,592 INFO L225 Difference]: With dead ends: 3346 [2021-05-21 21:19:56,592 INFO L226 Difference]: Without dead ends: 3334 [2021-05-21 21:19:56,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:19:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-05-21 21:19:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-05-21 21:19:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-05-21 21:19:56,623 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-05-21 21:19:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:56,623 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-05-21 21:19:56,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-05-21 21:19:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:56,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:56,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:56,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:56,826 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1567847404, now seen corresponding path program 25 times [2021-05-21 21:19:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:56,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98280477] [2021-05-21 21:19:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:56,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98280477] [2021-05-21 21:19:56,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98280477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249561821] [2021-05-21 21:19:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:56,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:56,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249561821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:56,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:56,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:56,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287034351] [2021-05-21 21:19:56,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:56,964 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:57,361 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-05-21 21:19:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 21:19:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:57,365 INFO L225 Difference]: With dead ends: 3635 [2021-05-21 21:19:57,366 INFO L226 Difference]: Without dead ends: 3631 [2021-05-21 21:19:57,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:19:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-05-21 21:19:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-05-21 21:19:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-05-21 21:19:57,399 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-05-21 21:19:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:57,399 INFO L482 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-05-21 21:19:57,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-05-21 21:19:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:57,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:57,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:57,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:57,602 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:57,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1748562448, now seen corresponding path program 26 times [2021-05-21 21:19:57,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:57,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79795952] [2021-05-21 21:19:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:57,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:57,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79795952] [2021-05-21 21:19:57,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79795952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:57,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328021328] [2021-05-21 21:19:57,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:57,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:57,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:19:57,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:57,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328021328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:57,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:57,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:19:57,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548828356] [2021-05-21 21:19:57,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:19:57,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:19:57,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:19:57,718 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:58,210 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-05-21 21:19:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 21:19:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:19:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:58,215 INFO L225 Difference]: With dead ends: 3810 [2021-05-21 21:19:58,215 INFO L226 Difference]: Without dead ends: 3810 [2021-05-21 21:19:58,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:19:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-05-21 21:19:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-05-21 21:19:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-05-21 21:19:58,249 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-05-21 21:19:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:58,249 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-05-21 21:19:58,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-05-21 21:19:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:19:58,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:58,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:58,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 21:19:58,469 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2115287982, now seen corresponding path program 29 times [2021-05-21 21:19:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:58,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381520262] [2021-05-21 21:19:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:59,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381520262] [2021-05-21 21:19:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381520262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426920233] [2021-05-21 21:19:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:59,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:19:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:19:59,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:30,009 WARN L205 SmtUtils]: Spent 30.45 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-05-21 21:20:30,357 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_15], 7=[A, v_prenex_25, v_prenex_17], 9=[v_prenex_23], 12=[v_prenex_19, v_prenex_21, v_prenex_20, v_prenex_14, v_prenex_13]} [2021-05-21 21:20:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:30,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:30,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-05-21 21:20:30,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:30,614 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-21 21:20:30,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:30,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:30,658 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-05-21 21:20:30,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-05-21 21:20:30,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:30,822 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-21 21:20:30,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:30,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:30,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:30,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 56 [2021-05-21 21:20:30,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:31,094 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-21 21:20:31,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,155 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-05-21 21:20:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-05-21 21:20:31,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:31,339 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-21 21:20:31,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:31,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,372 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-21 21:20:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-05-21 21:20:31,374 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:31,506 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-21 21:20:31,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,568 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-05-21 21:20:31,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-05-21 21:20:31,583 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:31,727 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-21 21:20:31,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,767 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-05-21 21:20:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-05-21 21:20:31,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:31,891 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-21 21:20:31,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:31,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:31,936 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-05-21 21:20:31,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-05-21 21:20:31,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:32,053 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-21 21:20:32,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:32,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,095 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-05-21 21:20:32,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-05-21 21:20:32,106 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:32,243 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-21 21:20:32,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:20:32,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-05-21 21:20:32,312 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-21 21:20:32,415 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-21 21:20:32,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:20:32,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-05-21 21:20:32,426 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 20 variables, input treesize:432, output treesize:135 [2021-05-21 21:20:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:32,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426920233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:32,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:32,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-21 21:20:32,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418669231] [2021-05-21 21:20:32,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:20:32,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:20:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:20:32,568 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-05-21 21:20:33,162 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-05-21 21:20:33,474 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-21 21:20:33,880 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-05-21 21:20:34,336 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-05-21 21:20:34,475 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-05-21 21:20:35,177 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-05-21 21:21:03,635 WARN L205 SmtUtils]: Spent 28.38 s on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-05-21 21:21:32,310 WARN L205 SmtUtils]: Spent 28.26 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-05-21 21:21:32,519 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-21 21:21:32,696 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-05-21 21:21:32,908 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-21 21:21:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:33,532 INFO L93 Difference]: Finished difference Result 2587 states and 8784 transitions. [2021-05-21 21:21:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 21:21:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-05-21 21:21:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:33,536 INFO L225 Difference]: With dead ends: 2587 [2021-05-21 21:21:33,536 INFO L226 Difference]: Without dead ends: 2572 [2021-05-21 21:21:33,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 91433.6ms TimeCoverageRelationStatistics Valid=855, Invalid=3567, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:21:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-05-21 21:21:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2119. [2021-05-21 21:21:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-05-21 21:21:33,562 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-05-21 21:21:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:33,562 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-05-21 21:21:33,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-05-21 21:21:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-05-21 21:21:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:21:33,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:33,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:33,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 21:21:33,766 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -47808706, now seen corresponding path program 30 times [2021-05-21 21:21:33,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:33,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625087926] [2021-05-21 21:21:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:34,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:34,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625087926] [2021-05-21 21:21:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625087926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54560644] [2021-05-21 21:21:34,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:34,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:21:34,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 21:21:34,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,536 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-05-21 21:21:34,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 30 [2021-05-21 21:21:34,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:21:34,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-21 21:21:34,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,622 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-05-21 21:21:34,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 26 [2021-05-21 21:21:34,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:21:34,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-05-21 21:21:34,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:21:34,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,758 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-05-21 21:21:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 19 [2021-05-21 21:21:34,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:21:34,764 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:21:34,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:34,790 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-05-21 21:21:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-05-21 21:21:34,792 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:34,848 INFO L628 ElimStorePlain]: treesize reduction 56, result has 38.5 percent of original size [2021-05-21 21:21:34,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:21:34,849 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:35 [2021-05-21 21:21:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:34,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54560644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:34,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:34,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-21 21:21:34,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471897567] [2021-05-21 21:21:34,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:21:34,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:21:34,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:21:34,927 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-05-21 21:21:35,993 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-21 21:21:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:37,416 INFO L93 Difference]: Finished difference Result 3291 states and 11148 transitions. [2021-05-21 21:21:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:21:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 29 [2021-05-21 21:21:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:37,422 INFO L225 Difference]: With dead ends: 3291 [2021-05-21 21:21:37,422 INFO L226 Difference]: Without dead ends: 3234 [2021-05-21 21:21:37,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2528.4ms TimeCoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:21:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-05-21 21:21:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2177. [2021-05-21 21:21:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.5091911764705883) internal successors, (7636), 2176 states have internal predecessors, (7636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7636 transitions. [2021-05-21 21:21:37,452 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7636 transitions. Word has length 29 [2021-05-21 21:21:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:37,453 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 7636 transitions. [2021-05-21 21:21:37,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-05-21 21:21:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7636 transitions. [2021-05-21 21:21:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:21:37,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:37,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:37,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:37,656 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1876233986, now seen corresponding path program 31 times [2021-05-21 21:21:37,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:37,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008971597] [2021-05-21 21:21:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:38,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:38,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008971597] [2021-05-21 21:21:38,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008971597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:38,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533530613] [2021-05-21 21:21:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:21:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,541 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-21 21:21:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-05-21 21:21:38,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,591 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-21 21:21:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-05-21 21:21:38,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:21:38,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-05-21 21:21:38,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,712 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-05-21 21:21:38,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-05-21 21:21:38,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,727 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 17 treesize of output 3 [2021-05-21 21:21:38,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-05-21 21:21:38,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:21:38,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:21:38,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:21:38,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-05-21 21:21:38,750 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:21:38,753 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:21:38,810 INFO L628 ElimStorePlain]: treesize reduction 44, result has 53.2 percent of original size [2021-05-21 21:21:38,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:21:38,811 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:367, output treesize:34 [2021-05-21 21:21:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:38,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533530613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:38,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:38,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:21:38,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499477126] [2021-05-21 21:21:38,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:21:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:21:38,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:21:38,892 INFO L87 Difference]: Start difference. First operand 2177 states and 7636 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) [2021-05-21 21:21:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:41,023 INFO L93 Difference]: Finished difference Result 3600 states and 12115 transitions. [2021-05-21 21:21:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:21:41,023 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 29 [2021-05-21 21:21:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:41,028 INFO L225 Difference]: With dead ends: 3600 [2021-05-21 21:21:41,028 INFO L226 Difference]: Without dead ends: 3556 [2021-05-21 21:21:41,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2156.7ms TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:21:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-05-21 21:21:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2245. [2021-05-21 21:21:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-05-21 21:21:41,074 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-05-21 21:21:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:41,074 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-05-21 21:21:41,074 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) [2021-05-21 21:21:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-05-21 21:21:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:21:41,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:41,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:41,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-21 21:21:41,281 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1584110280, now seen corresponding path program 32 times [2021-05-21 21:21:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:41,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103262156] [2021-05-21 21:21:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:41,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:41,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103262156] [2021-05-21 21:21:41,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103262156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:41,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773274097] [2021-05-21 21:21:41,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:41,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:21:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:21:41,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:42,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773274097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:42,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:42,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:21:42,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726311459] [2021-05-21 21:21:42,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:21:42,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:21:42,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:21:42,232 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 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) [2021-05-21 21:21:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:43,823 INFO L93 Difference]: Finished difference Result 3142 states and 10717 transitions. [2021-05-21 21:21:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:21:43,823 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 29 [2021-05-21 21:21:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:43,827 INFO L225 Difference]: With dead ends: 3142 [2021-05-21 21:21:43,827 INFO L226 Difference]: Without dead ends: 3112 [2021-05-21 21:21:43,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1752.6ms TimeCoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 21:21:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-05-21 21:21:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2245. [2021-05-21 21:21:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-05-21 21:21:43,856 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-05-21 21:21:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:43,856 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-05-21 21:21:43,856 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) [2021-05-21 21:21:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-05-21 21:21:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:21:43,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:43,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:44,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:44,065 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1619613102, now seen corresponding path program 13 times [2021-05-21 21:21:44,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:44,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063115845] [2021-05-21 21:21:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:44,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:44,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063115845] [2021-05-21 21:21:44,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063115845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:44,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905995226] [2021-05-21 21:21:44,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:21:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:45,349 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-05-21 21:21:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905995226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:45,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:45,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-05-21 21:21:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657227952] [2021-05-21 21:21:45,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:21:45,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:21:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:21:45,588 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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) [2021-05-21 21:21:50,266 WARN L205 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-21 21:22:14,845 WARN L205 SmtUtils]: Spent 24.22 s on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-05-21 21:22:16,987 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-05-21 21:22:25,165 WARN L205 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-21 21:22:35,924 WARN L205 SmtUtils]: Spent 10.19 s on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-05-21 21:22:42,193 WARN L205 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-21 21:22:42,466 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-05-21 21:22:42,746 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-05-21 21:22:43,238 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-05-21 21:22:43,551 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-05-21 21:22:43,764 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-05-21 21:22:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:44,082 INFO L93 Difference]: Finished difference Result 3710 states and 12255 transitions. [2021-05-21 21:22:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:22:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 29 [2021-05-21 21:22:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:44,088 INFO L225 Difference]: With dead ends: 3710 [2021-05-21 21:22:44,088 INFO L226 Difference]: Without dead ends: 3695 [2021-05-21 21:22:44,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 58565.9ms TimeCoverageRelationStatistics Valid=782, Invalid=3250, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:22:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-05-21 21:22:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2255. [2021-05-21 21:22:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.503549245785271) internal successors, (7897), 2254 states have internal predecessors, (7897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 7897 transitions. [2021-05-21 21:22:44,124 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 7897 transitions. Word has length 29 [2021-05-21 21:22:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:44,124 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 7897 transitions. [2021-05-21 21:22:44,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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) [2021-05-21 21:22:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 7897 transitions. [2021-05-21 21:22:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:22:44,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:44,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:44,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:44,327 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1969180942, now seen corresponding path program 14 times [2021-05-21 21:22:44,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:44,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863559294] [2021-05-21 21:22:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:44,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:44,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863559294] [2021-05-21 21:22:44,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863559294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:44,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176547572] [2021-05-21 21:22:44,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:22:44,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:44,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:22:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:45,610 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-05-21 21:22:45,711 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_41, v_prenex_39], 7=[A, v_prenex_43, v_prenex_42, v_prenex_40]} [2021-05-21 21:22:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:45,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:22:45,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:45,866 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-21 21:22:45,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:45,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:22:45,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,017 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-21 21:22:46,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:22:46,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:46,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:22:46,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,322 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-05-21 21:22:46,322 INFO L628 ElimStorePlain]: treesize reduction 24, result has 91.0 percent of original size [2021-05-21 21:22:46,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,346 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:22:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:22:46,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,477 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:22:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:22:46,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,503 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:22:46,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:22:46,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,655 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-05-21 21:22:46,656 INFO L628 ElimStorePlain]: treesize reduction 27, result has 85.5 percent of original size [2021-05-21 21:22:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:22:46,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:46,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:22:46,683 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:22:46,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:22:46,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-21 21:22:46,752 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-05-21 21:22:46,881 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-05-21 21:22:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176547572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:46,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-21 21:22:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85250641] [2021-05-21 21:22:46,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:22:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:22:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:22:46,926 INFO L87 Difference]: Start difference. First operand 2255 states and 7897 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2021-05-21 21:22:51,730 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-21 21:23:04,496 WARN L205 SmtUtils]: Spent 12.23 s on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-05-21 21:23:12,861 WARN L205 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-05-21 21:23:36,020 WARN L205 SmtUtils]: Spent 22.90 s on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2021-05-21 21:23:36,376 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-05-21 21:23:36,850 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-05-21 21:23:37,120 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-05-21 21:23:37,291 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-05-21 21:23:37,755 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-05-21 21:23:38,633 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-21 21:23:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:38,773 INFO L93 Difference]: Finished difference Result 4143 states and 13701 transitions. [2021-05-21 21:23:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 21:23:38,773 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 21:23:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:38,779 INFO L225 Difference]: With dead ends: 4143 [2021-05-21 21:23:38,779 INFO L226 Difference]: Without dead ends: 4113 [2021-05-21 21:23:38,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 52209.4ms TimeCoverageRelationStatistics Valid=809, Invalid=3481, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 21:23:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-05-21 21:23:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 2272. [2021-05-21 21:23:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 3.5055041831792164) internal successors, (7961), 2271 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 7961 transitions. [2021-05-21 21:23:38,816 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 7961 transitions. Word has length 29 [2021-05-21 21:23:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:38,816 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 7961 transitions. [2021-05-21 21:23:38,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2021-05-21 21:23:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 7961 transitions. [2021-05-21 21:23:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:23:38,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:38,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:39,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:39,019 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:39,020 INFO L82 PathProgramCache]: Analyzing trace with hash -580502318, now seen corresponding path program 15 times [2021-05-21 21:23:39,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:39,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954037857] [2021-05-21 21:23:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:39,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954037857] [2021-05-21 21:23:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954037857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208278628] [2021-05-21 21:23:39,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:39,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:23:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:23:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:40,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:40,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:23:40,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:40,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 88 [2021-05-21 21:23:40,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-21 21:23:40,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,443 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-05-21 21:23:40,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-05-21 21:23:40,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,531 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-05-21 21:23:40,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 74 [2021-05-21 21:23:40,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:40,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:23:40,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,665 INFO L354 Elim1Store]: treesize reduction 16, result has 79.7 percent of original size [2021-05-21 21:23:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 72 [2021-05-21 21:23:40,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,734 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-05-21 21:23:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-05-21 21:23:40,735 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:23:40,739 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:23:40,817 INFO L354 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2021-05-21 21:23:40,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 62 [2021-05-21 21:23:40,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:40,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:23:40,853 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:41,018 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-05-21 21:23:41,018 INFO L628 ElimStorePlain]: treesize reduction 219, result has 44.6 percent of original size [2021-05-21 21:23:41,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-21 21:23:41,025 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:632, output treesize:216 [2021-05-21 21:23:41,179 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-21 21:23:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:41,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208278628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:41,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:41,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-05-21 21:23:41,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009203897] [2021-05-21 21:23:41,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:23:41,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:23:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:23:41,244 INFO L87 Difference]: Start difference. First operand 2272 states and 7961 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2021-05-21 21:23:42,923 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-05-21 21:23:43,356 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-21 21:23:43,705 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-21 21:23:43,820 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-21 21:23:43,975 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-05-21 21:23:44,306 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-05-21 21:23:44,441 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-21 21:23:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:44,537 INFO L93 Difference]: Finished difference Result 3440 states and 11411 transitions. [2021-05-21 21:23:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:23:44,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 29 [2021-05-21 21:23:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:44,542 INFO L225 Difference]: With dead ends: 3440 [2021-05-21 21:23:44,542 INFO L226 Difference]: Without dead ends: 3375 [2021-05-21 21:23:44,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3523.3ms TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:23:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-05-21 21:23:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2300. [2021-05-21 21:23:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.4993475424097435) internal successors, (8045), 2299 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8045 transitions. [2021-05-21 21:23:44,577 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8045 transitions. Word has length 29 [2021-05-21 21:23:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:44,578 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 8045 transitions. [2021-05-21 21:23:44,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2021-05-21 21:23:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8045 transitions. [2021-05-21 21:23:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:23:44,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:44,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:44,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-05-21 21:23:44,781 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash -517413926, now seen corresponding path program 16 times [2021-05-21 21:23:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:44,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898965242] [2021-05-21 21:23:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:45,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898965242] [2021-05-21 21:23:45,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898965242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800068460] [2021-05-21 21:23:45,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:45,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:23:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:45,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800068460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:45,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:45,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-21 21:23:45,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955427863] [2021-05-21 21:23:45,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:23:45,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:23:45,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:23:45,682 INFO L87 Difference]: Start difference. First operand 2300 states and 8045 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-05-21 21:23:46,587 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-05-21 21:23:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:46,823 INFO L93 Difference]: Finished difference Result 3205 states and 10722 transitions. [2021-05-21 21:23:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:23:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 29 [2021-05-21 21:23:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:46,828 INFO L225 Difference]: With dead ends: 3205 [2021-05-21 21:23:46,828 INFO L226 Difference]: Without dead ends: 3190 [2021-05-21 21:23:46,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1457.2ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:23:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-05-21 21:23:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2296. [2021-05-21 21:23:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.5002178649237474) internal successors, (8033), 2295 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8033 transitions. [2021-05-21 21:23:46,878 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8033 transitions. Word has length 29 [2021-05-21 21:23:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:46,878 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8033 transitions. [2021-05-21 21:23:46,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-05-21 21:23:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8033 transitions. [2021-05-21 21:23:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:23:46,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:46,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:47,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:47,081 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1600210838, now seen corresponding path program 17 times [2021-05-21 21:23:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:47,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928795921] [2021-05-21 21:23:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:47,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:47,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928795921] [2021-05-21 21:23:47,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928795921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351386198] [2021-05-21 21:23:47,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:47,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:23:47,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:47,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:23:47,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:49,627 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-21 21:23:50,246 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_51, v_prenex_55], 7=[v_prenex_50, A, v_prenex_54, v_prenex_52, v_prenex_58, v_prenex_57]} [2021-05-21 21:23:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:23:50,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:50,396 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-21 21:23:50,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:23:50,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:50,540 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-21 21:23:50,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,567 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:23:50,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:23:50,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:50,689 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-21 21:23:50,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:23:50,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:50,832 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-21 21:23:50,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,857 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:23:50,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:23:50,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:50,967 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-05-21 21:23:50,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:50,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:23:51,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:51,102 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-21 21:23:51,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:51,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:23:51,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:51,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:23:51,275 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:23:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:23:51,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:23:51,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:23:51,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-05-21 21:23:51,368 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:103 [2021-05-21 21:23:51,533 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-05-21 21:23:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:51,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351386198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:51,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:51,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-21 21:23:51,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189648095] [2021-05-21 21:23:51,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:23:51,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:23:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:23:51,550 INFO L87 Difference]: Start difference. First operand 2296 states and 8033 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-05-21 21:24:00,130 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-21 21:24:30,045 WARN L205 SmtUtils]: Spent 29.64 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-21 21:24:36,244 WARN L205 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-05-21 21:25:00,640 WARN L205 SmtUtils]: Spent 24.21 s on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-05-21 21:25:01,130 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-05-21 21:25:01,357 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-05-21 21:25:01,625 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-05-21 21:25:01,902 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-05-21 21:25:02,363 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-21 21:25:02,640 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-05-21 21:25:02,845 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-05-21 21:25:03,191 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-05-21 21:25:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:03,466 INFO L93 Difference]: Finished difference Result 3169 states and 10683 transitions. [2021-05-21 21:25:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:25:03,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-05-21 21:25:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:03,472 INFO L225 Difference]: With dead ends: 3169 [2021-05-21 21:25:03,472 INFO L226 Difference]: Without dead ends: 3115 [2021-05-21 21:25:03,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 73946.5ms TimeCoverageRelationStatistics Valid=458, Invalid=2734, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:25:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-05-21 21:25:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2316. [2021-05-21 21:25:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 3.498488120950324) internal successors, (8099), 2315 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 8099 transitions. [2021-05-21 21:25:03,517 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 8099 transitions. Word has length 29 [2021-05-21 21:25:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:03,517 INFO L482 AbstractCegarLoop]: Abstraction has 2316 states and 8099 transitions. [2021-05-21 21:25:03,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-05-21 21:25:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 8099 transitions. [2021-05-21 21:25:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:25:03,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:03,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:03,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:03,720 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2024544714, now seen corresponding path program 18 times [2021-05-21 21:25:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:03,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468497337] [2021-05-21 21:25:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:04,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468497337] [2021-05-21 21:25:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468497337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597382111] [2021-05-21 21:25:04,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:04,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:25:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:25:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:04,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597382111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:04,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:04,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-21 21:25:04,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496402836] [2021-05-21 21:25:04,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:25:04,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:25:04,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:25:04,557 INFO L87 Difference]: Start difference. First operand 2316 states and 8099 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-05-21 21:25:05,142 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-21 21:25:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:05,243 INFO L93 Difference]: Finished difference Result 2857 states and 9771 transitions. [2021-05-21 21:25:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:25:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 29 [2021-05-21 21:25:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:05,247 INFO L225 Difference]: With dead ends: 2857 [2021-05-21 21:25:05,248 INFO L226 Difference]: Without dead ends: 2842 [2021-05-21 21:25:05,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1042.5ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:25:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-05-21 21:25:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2306. [2021-05-21 21:25:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.5010845986984815) internal successors, (8070), 2305 states have internal predecessors, (8070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8070 transitions. [2021-05-21 21:25:05,278 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8070 transitions. Word has length 29 [2021-05-21 21:25:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:05,278 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 8070 transitions. [2021-05-21 21:25:05,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-05-21 21:25:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8070 transitions. [2021-05-21 21:25:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:25:05,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:05,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:05,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-21 21:25:05,481 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1418429486, now seen corresponding path program 19 times [2021-05-21 21:25:05,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:05,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817323642] [2021-05-21 21:25:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:05,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:05,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817323642] [2021-05-21 21:25:05,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817323642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:05,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604628922] [2021-05-21 21:25:05,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:25:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:10,278 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-21 21:25:14,406 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 58 [2021-05-21 21:25:14,600 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_70, v_prenex_67], 7=[A, v_prenex_74, v_prenex_73, v_prenex_69, v_prenex_68, v_prenex_77]} [2021-05-21 21:25:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:14,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:25:14,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:14,763 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-21 21:25:14,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:14,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:14,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:25:14,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:14,890 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-21 21:25:14,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:14,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:14,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:25:14,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:15,027 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-05-21 21:25:15,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,052 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:25:15,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:25:15,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:15,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,179 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:25:15,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:25:15,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:15,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:25:15,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:15,451 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-21 21:25:15,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,475 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:25:15,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:25:15,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:15,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:25:15,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:25:15,594 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:25:15,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:25:15,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-05-21 21:25:15,672 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:305, output treesize:91 [2021-05-21 21:25:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:15,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604628922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:15,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:15,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-21 21:25:15,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051437284] [2021-05-21 21:25:15,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:25:15,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:15,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:25:15,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:25:15,785 INFO L87 Difference]: Start difference. First operand 2306 states and 8070 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-05-21 21:25:22,596 WARN L205 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-05-21 21:25:31,015 WARN L205 SmtUtils]: Spent 8.17 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-21 21:25:43,395 WARN L205 SmtUtils]: Spent 10.18 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-21 21:25:51,617 WARN L205 SmtUtils]: Spent 8.19 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-05-21 21:26:06,051 WARN L205 SmtUtils]: Spent 12.34 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-05-21 21:26:18,324 WARN L205 SmtUtils]: Spent 12.24 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-05-21 21:26:26,717 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-21 21:26:26,887 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-21 21:26:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:27,136 INFO L93 Difference]: Finished difference Result 3233 states and 11042 transitions. [2021-05-21 21:26:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:26:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-05-21 21:26:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:27,143 INFO L225 Difference]: With dead ends: 3233 [2021-05-21 21:26:27,143 INFO L226 Difference]: Without dead ends: 3218 [2021-05-21 21:26:27,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 67330.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:26:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-05-21 21:26:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2318. [2021-05-21 21:26:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 3.503668536901165) internal successors, (8118), 2317 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 8118 transitions. [2021-05-21 21:26:27,182 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 8118 transitions. Word has length 29 [2021-05-21 21:26:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:27,182 INFO L482 AbstractCegarLoop]: Abstraction has 2318 states and 8118 transitions. [2021-05-21 21:26:27,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-05-21 21:26:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 8118 transitions. [2021-05-21 21:26:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:26:27,186 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:27,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:27,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-05-21 21:26:27,403 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:27,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1099848014, now seen corresponding path program 33 times [2021-05-21 21:26:27,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:27,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140906389] [2021-05-21 21:26:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:27,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:27,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140906389] [2021-05-21 21:26:27,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140906389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:27,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236176156] [2021-05-21 21:26:27,715 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 [2021-05-21 21:26:27,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:26:27,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:26:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,162 INFO L354 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2021-05-21 21:26:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 47 [2021-05-21 21:26:28,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:26:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-21 21:26:28,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:26:28,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 71 [2021-05-21 21:26:28,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,339 INFO L354 Elim1Store]: treesize reduction 38, result has 35.6 percent of original size [2021-05-21 21:26:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 33 [2021-05-21 21:26:28,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:26:28,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:26:28,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:26:28,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:26:28,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:26:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-05-21 21:26:28,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:28,382 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-05-21 21:26:28,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-05-21 21:26:28,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:26:28,387 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:26:28,390 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:28,448 INFO L628 ElimStorePlain]: treesize reduction 43, result has 50.6 percent of original size [2021-05-21 21:26:28,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:26:28,449 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:388, output treesize:34 [2021-05-21 21:26:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:28,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236176156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:28,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:28,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-21 21:26:28,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324704061] [2021-05-21 21:26:28,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:26:28,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:28,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:26:28,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:26:28,515 INFO L87 Difference]: Start difference. First operand 2318 states and 8118 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-05-21 21:26:30,694 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-21 21:26:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:31,011 INFO L93 Difference]: Finished difference Result 4037 states and 13530 transitions. [2021-05-21 21:26:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:26:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 29 [2021-05-21 21:26:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:31,017 INFO L225 Difference]: With dead ends: 4037 [2021-05-21 21:26:31,017 INFO L226 Difference]: Without dead ends: 3993 [2021-05-21 21:26:31,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2295.6ms TimeCoverageRelationStatistics Valid=657, Invalid=2535, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:26:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-05-21 21:26:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 2466. [2021-05-21 21:26:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.5030425963488843) internal successors, (8635), 2465 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8635 transitions. [2021-05-21 21:26:31,056 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8635 transitions. Word has length 29 [2021-05-21 21:26:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:31,056 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8635 transitions. [2021-05-21 21:26:31,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-05-21 21:26:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8635 transitions. [2021-05-21 21:26:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:26:31,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:31,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:31,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-21 21:26:31,260 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1934471044, now seen corresponding path program 34 times [2021-05-21 21:26:31,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:31,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709927307] [2021-05-21 21:26:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:31,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709927307] [2021-05-21 21:26:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709927307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767984514] [2021-05-21 21:26:31,579 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 [2021-05-21 21:26:31,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:26:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:26:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:32,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767984514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:32,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:32,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-21 21:26:32,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306318742] [2021-05-21 21:26:32,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:26:32,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:26:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:26:32,079 INFO L87 Difference]: Start difference. First operand 2466 states and 8635 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-05-21 21:26:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:33,888 INFO L93 Difference]: Finished difference Result 3644 states and 12305 transitions. [2021-05-21 21:26:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:26:33,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 29 [2021-05-21 21:26:33,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:33,894 INFO L225 Difference]: With dead ends: 3644 [2021-05-21 21:26:33,894 INFO L226 Difference]: Without dead ends: 3600 [2021-05-21 21:26:33,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1711.0ms TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 21:26:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-05-21 21:26:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2454. [2021-05-21 21:26:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.5026498165511617) internal successors, (8592), 2453 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 8592 transitions. [2021-05-21 21:26:33,929 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 8592 transitions. Word has length 29 [2021-05-21 21:26:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:33,929 INFO L482 AbstractCegarLoop]: Abstraction has 2454 states and 8592 transitions. [2021-05-21 21:26:33,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-05-21 21:26:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 8592 transitions. [2021-05-21 21:26:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:26:33,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:33,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:34,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-05-21 21:26:34,132 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1316037810, now seen corresponding path program 20 times [2021-05-21 21:26:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:34,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232345114] [2021-05-21 21:26:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:34,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:34,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232345114] [2021-05-21 21:26:34,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232345114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:34,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106370396] [2021-05-21 21:26:34,891 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 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 [2021-05-21 21:26:34,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:26:34,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:34,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:26:34,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,232 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-21 21:26:35,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-05-21 21:26:35,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,255 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-21 21:26:35,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-05-21 21:26:35,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:26:35,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:26:35,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,286 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-21 21:26:35,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-05-21 21:26:35,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:26:35,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,316 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:26:35,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:26:35,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,346 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:26:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:26:35,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:26:35,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:26:35,383 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,401 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-21 21:26:35,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-05-21 21:26:35,402 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,422 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-21 21:26:35,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-05-21 21:26:35,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:26:35,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:26:35,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:26:35,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:26:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:26:35,473 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-21 21:26:35,532 INFO L628 ElimStorePlain]: treesize reduction 33, result has 57.7 percent of original size [2021-05-21 21:26:35,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-21 21:26:35,533 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:431, output treesize:45 [2021-05-21 21:26:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:35,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106370396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:35,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:35,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-05-21 21:26:35,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652094598] [2021-05-21 21:26:35,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:26:35,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:26:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:26:35,592 INFO L87 Difference]: Start difference. First operand 2454 states and 8592 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-05-21 21:26:36,461 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-05-21 21:26:36,664 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2021-05-21 21:26:36,787 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-21 21:26:36,936 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-21 21:26:37,212 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-05-21 21:26:37,621 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-05-21 21:26:37,813 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-05-21 21:26:37,952 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2021-05-21 21:26:38,178 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-05-21 21:26:38,354 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-05-21 21:26:39,176 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-21 21:26:39,456 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-05-21 21:26:39,608 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-05-21 21:26:39,786 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-05-21 21:26:39,961 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-05-21 21:26:40,116 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2021-05-21 21:26:40,402 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-05-21 21:26:40,756 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-05-21 21:26:41,005 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-05-21 21:26:41,290 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-05-21 21:26:41,418 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-05-21 21:26:41,642 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-05-21 21:26:41,822 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-21 21:26:42,100 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-05-21 21:26:42,384 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2021-05-21 21:26:42,684 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-05-21 21:26:43,023 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-05-21 21:26:43,177 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-21 21:26:43,351 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-05-21 21:26:43,579 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-05-21 21:26:43,796 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-05-21 21:26:44,148 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-21 21:26:44,337 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-21 21:26:44,655 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-05-21 21:26:44,946 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-05-21 21:26:45,484 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-21 21:26:45,654 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-21 21:26:45,877 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-05-21 21:26:46,118 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-05-21 21:26:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:46,270 INFO L93 Difference]: Finished difference Result 4608 states and 15272 transitions. [2021-05-21 21:26:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-21 21:26:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 29 [2021-05-21 21:26:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:46,277 INFO L225 Difference]: With dead ends: 4608 [2021-05-21 21:26:46,277 INFO L226 Difference]: Without dead ends: 4593 [2021-05-21 21:26:46,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 9594.8ms TimeCoverageRelationStatistics Valid=908, Invalid=7648, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 21:26:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-05-21 21:26:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2453. [2021-05-21 21:26:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 3.504078303425775) internal successors, (8592), 2452 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 8592 transitions. [2021-05-21 21:26:46,323 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 8592 transitions. Word has length 29 [2021-05-21 21:26:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:46,323 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 8592 transitions. [2021-05-21 21:26:46,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-05-21 21:26:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 8592 transitions. [2021-05-21 21:26:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:26:46,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:46,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:46,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable725 [2021-05-21 21:26:46,550 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:46,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1804724658, now seen corresponding path program 21 times [2021-05-21 21:26:46,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:46,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993279604] [2021-05-21 21:26:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:47,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:47,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993279604] [2021-05-21 21:26:47,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993279604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:47,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906708069] [2021-05-21 21:26:47,158 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 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 [2021-05-21 21:26:47,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:26:47,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 21:26:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:35,280 WARN L205 SmtUtils]: Spent 47.64 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-21 21:27:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:27:35,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:35,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:27:35,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:35,544 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.3 percent of original size [2021-05-21 21:27:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:27:35,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:35,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:35,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:35,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:27:35,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:35,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:35,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:27:35,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:112, output treesize:33 [2021-05-21 21:27:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:35,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906708069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:35,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:35,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-05-21 21:27:35,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480696495] [2021-05-21 21:27:35,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:27:35,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:27:35,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:27:35,676 INFO L87 Difference]: Start difference. First operand 2453 states and 8592 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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) [2021-05-21 21:27:36,721 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-05-21 21:27:37,428 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-05-21 21:27:37,693 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-05-21 21:27:38,756 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-05-21 21:27:38,979 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-05-21 21:27:39,131 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-05-21 21:27:39,273 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-05-21 21:27:42,222 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-05-21 21:27:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:42,314 INFO L93 Difference]: Finished difference Result 4353 states and 14593 transitions. [2021-05-21 21:27:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 21:27:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 29 [2021-05-21 21:27:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:42,320 INFO L225 Difference]: With dead ends: 4353 [2021-05-21 21:27:42,320 INFO L226 Difference]: Without dead ends: 4323 [2021-05-21 21:27:42,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 52113.9ms TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 21:27:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2021-05-21 21:27:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 2463. [2021-05-21 21:27:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 3.500812347684809) internal successors, (8619), 2462 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 8619 transitions. [2021-05-21 21:27:42,361 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 8619 transitions. Word has length 29 [2021-05-21 21:27:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:42,361 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 8619 transitions. [2021-05-21 21:27:42,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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) [2021-05-21 21:27:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 8619 transitions. [2021-05-21 21:27:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:27:42,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:42,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:42,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:42,565 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1829857094, now seen corresponding path program 22 times [2021-05-21 21:27:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:42,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532457961] [2021-05-21 21:27:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:43,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:43,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532457961] [2021-05-21 21:27:43,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532457961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:43,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916757359] [2021-05-21 21:27:43,224 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 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 [2021-05-21 21:27:43,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:43,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:27:43,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:47,524 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-21 21:27:48,268 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-05-21 21:27:48,329 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_93, v_prenex_91], 7=[v_prenex_94, A, v_prenex_92, v_prenex_90]} [2021-05-21 21:27:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:48,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:27:48,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:48,526 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-21 21:27:48,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:48,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:27:48,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:48,728 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-21 21:27:48,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:48,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:27:48,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:48,901 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-21 21:27:48,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,932 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:27:48,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:27:48,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:48,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:48,957 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:27:48,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:27:48,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:49,160 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-05-21 21:27:49,160 INFO L628 ElimStorePlain]: treesize reduction 27, result has 89.3 percent of original size [2021-05-21 21:27:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,183 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:27:49,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:27:49,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:49,292 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-21 21:27:49,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:49,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:27:49,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:27:49,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:27:49,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:27:49,361 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:27:49,490 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-05-21 21:27:49,491 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.0 percent of original size [2021-05-21 21:27:49,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-21 21:27:49,494 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-05-21 21:27:49,623 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-05-21 21:27:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:49,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916757359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:49,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:49,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-05-21 21:27:49,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880120256] [2021-05-21 21:27:49,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:27:49,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:27:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:27:49,653 INFO L87 Difference]: Start difference. First operand 2463 states and 8619 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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) [2021-05-21 21:27:54,269 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-05-21 21:27:54,485 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-05-21 21:28:00,208 WARN L205 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-05-21 21:28:16,440 WARN L205 SmtUtils]: Spent 16.20 s on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-05-21 21:28:16,582 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2021-05-21 21:28:16,823 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-05-21 21:28:17,097 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-05-21 21:28:17,244 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-05-21 21:28:18,480 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2021-05-21 21:28:18,704 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-21 21:28:26,962 WARN L205 SmtUtils]: Spent 8.17 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-05-21 21:28:33,188 WARN L205 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-05-21 21:28:49,590 WARN L205 SmtUtils]: Spent 16.37 s on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-05-21 21:28:58,669 WARN L205 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2021-05-21 21:29:06,957 WARN L205 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-05-21 21:29:15,372 WARN L205 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-05-21 21:29:15,612 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-05-21 21:29:15,810 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-05-21 21:29:16,184 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-21 21:29:18,677 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2021-05-21 21:29:18,993 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-05-21 21:29:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:19,556 INFO L93 Difference]: Finished difference Result 4854 states and 16220 transitions. [2021-05-21 21:29:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:29:19,557 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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 29 [2021-05-21 21:29:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:19,564 INFO L225 Difference]: With dead ends: 4854 [2021-05-21 21:29:19,564 INFO L226 Difference]: Without dead ends: 4824 [2021-05-21 21:29:19,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 91983.6ms TimeCoverageRelationStatistics Valid=761, Invalid=4069, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 21:29:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-05-21 21:29:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 2470. [2021-05-21 21:29:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5006075334143376) internal successors, (8643), 2469 states have internal predecessors, (8643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8643 transitions. [2021-05-21 21:29:19,603 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8643 transitions. Word has length 29 [2021-05-21 21:29:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:19,603 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8643 transitions. [2021-05-21 21:29:19,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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) [2021-05-21 21:29:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8643 transitions. [2021-05-21 21:29:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:29:19,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:19,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:19,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-05-21 21:29:19,809 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1094655562, now seen corresponding path program 23 times [2021-05-21 21:29:19,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:19,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460728294] [2021-05-21 21:29:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:20,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460728294] [2021-05-21 21:29:20,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460728294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426664022] [2021-05-21 21:29:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:29:20,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:29:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:29:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:21,279 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-05-21 21:29:21,564 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-05-21 21:29:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:21,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426664022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:21,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:21,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-05-21 21:29:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066958573] [2021-05-21 21:29:21,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:29:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:29:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:29:21,756 INFO L87 Difference]: Start difference. First operand 2470 states and 8643 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2021-05-21 21:29:22,447 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-05-21 21:29:24,556 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-21 21:29:24,854 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-05-21 21:29:25,022 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-05-21 21:29:25,388 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-05-21 21:29:25,714 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-05-21 21:29:35,921 WARN L205 SmtUtils]: Spent 10.18 s on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2021-05-21 21:29:36,206 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-05-21 21:29:36,552 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-05-21 21:29:38,963 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-05-21 21:29:41,345 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-05-21 21:29:45,639 WARN L205 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-05-21 21:29:45,895 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-05-21 21:29:46,070 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-05-21 21:29:50,673 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-05-21 21:29:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:50,758 INFO L93 Difference]: Finished difference Result 4250 states and 14363 transitions. [2021-05-21 21:29:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:29:50,758 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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 29 [2021-05-21 21:29:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:50,764 INFO L225 Difference]: With dead ends: 4250 [2021-05-21 21:29:50,764 INFO L226 Difference]: Without dead ends: 4235 [2021-05-21 21:29:50,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 25468.7ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:29:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-05-21 21:29:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2477. [2021-05-21 21:29:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.500403877221325) internal successors, (8667), 2476 states have internal predecessors, (8667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 8667 transitions. [2021-05-21 21:29:50,800 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 8667 transitions. Word has length 29 [2021-05-21 21:29:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:50,800 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 8667 transitions. [2021-05-21 21:29:50,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2021-05-21 21:29:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 8667 transitions. [2021-05-21 21:29:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:29:50,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:50,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:51,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-05-21 21:29:51,003 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:51,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1069523126, now seen corresponding path program 24 times [2021-05-21 21:29:51,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:51,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363021240] [2021-05-21 21:29:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:51,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:51,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363021240] [2021-05-21 21:29:51,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363021240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:51,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137592955] [2021-05-21 21:29:51,669 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 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 [2021-05-21 21:29:51,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:29:51,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:29:51,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:56,001 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-21 21:30:36,920 WARN L205 SmtUtils]: Spent 40.83 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-05-21 21:30:36,970 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_111], 7=[v_prenex_107, v_prenex_108, v_prenex_109, v_prenex_110]} [2021-05-21 21:30:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:36,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:36,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:30:36,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,112 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-21 21:30:37,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-21 21:30:37,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,247 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-21 21:30:37,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:30:37,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:30:37,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,504 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-05-21 21:30:37,504 INFO L628 ElimStorePlain]: treesize reduction 19, result has 91.5 percent of original size [2021-05-21 21:30:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,537 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:30:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:30:37,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,563 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-21 21:30:37,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-21 21:30:37,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,699 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-05-21 21:30:37,699 INFO L628 ElimStorePlain]: treesize reduction 21, result has 87.3 percent of original size [2021-05-21 21:30:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,723 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:30:37,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-21 21:30:37,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:30:37,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-21 21:30:37,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:30:37,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:30:37,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-21 21:30:37,881 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:301, output treesize:71 [2021-05-21 21:30:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:38,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137592955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:38,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:38,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-05-21 21:30:38,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556858584] [2021-05-21 21:30:38,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:30:38,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:38,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:30:38,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:30:38,011 INFO L87 Difference]: Start difference. First operand 2477 states and 8667 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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) [2021-05-21 21:30:38,690 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-05-21 21:30:38,991 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-05-21 21:30:39,287 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-05-21 21:30:39,642 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-05-21 21:30:39,790 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-05-21 21:30:39,987 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-05-21 21:30:40,378 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-05-21 21:30:46,543 WARN L205 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-21 21:30:47,067 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-21 21:30:55,426 WARN L205 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-05-21 21:30:55,838 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-05-21 21:30:56,074 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-21 21:31:44,680 WARN L205 SmtUtils]: Spent 48.39 s on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-05-21 21:32:03,013 WARN L205 SmtUtils]: Spent 18.28 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-05-21 21:32:49,430 WARN L205 SmtUtils]: Spent 46.32 s on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2021-05-21 21:32:49,569 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-21 21:32:49,844 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-05-21 21:32:50,149 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-21 21:32:50,449 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-05-21 21:32:50,618 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-05-21 21:32:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:50,824 INFO L93 Difference]: Finished difference Result 4860 states and 16315 transitions. [2021-05-21 21:32:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 21:32:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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 29 [2021-05-21 21:32:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:50,830 INFO L225 Difference]: With dead ends: 4860 [2021-05-21 21:32:50,830 INFO L226 Difference]: Without dead ends: 4830 [2021-05-21 21:32:50,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 177227.4ms TimeCoverageRelationStatistics Valid=803, Invalid=4167, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 21:32:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-05-21 21:32:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2466. [2021-05-21 21:32:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.502231237322515) internal successors, (8633), 2465 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8633 transitions. [2021-05-21 21:32:50,866 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8633 transitions. Word has length 29 [2021-05-21 21:32:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:50,866 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8633 transitions. [2021-05-21 21:32:50,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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) [2021-05-21 21:32:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8633 transitions. [2021-05-21 21:32:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:32:50,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:50,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:51,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:51,070 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -847199862, now seen corresponding path program 35 times [2021-05-21 21:32:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858625036] [2021-05-21 21:32:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:32:51,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:51,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858625036] [2021-05-21 21:32:51,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858625036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51568826] [2021-05-21 21:32:51,323 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 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 [2021-05-21 21:32:51,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:32:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:32:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,819 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-05-21 21:32:51,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-05-21 21:32:51,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:51,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:51,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:51,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:51,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:51,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:51,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 7 [2021-05-21 21:32:51,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,895 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-05-21 21:32:51,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 38 [2021-05-21 21:32:51,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,939 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-05-21 21:32:51,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 23 [2021-05-21 21:32:51,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:51,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:32:51,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:32:52,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 97 [2021-05-21 21:32:52,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:52,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:32:52,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:52,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,107 INFO L354 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2021-05-21 21:32:52,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 61 [2021-05-21 21:32:52,117 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:52,137 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-05-21 21:32:52,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 19 [2021-05-21 21:32:52,138 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:52,213 INFO L628 ElimStorePlain]: treesize reduction 112, result has 36.7 percent of original size [2021-05-21 21:32:52,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:32:52,215 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:433, output treesize:52 [2021-05-21 21:32:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:32:52,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51568826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:52,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:52,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-05-21 21:32:52,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919562445] [2021-05-21 21:32:52,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:32:52,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:52,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:32:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:32:52,441 INFO L87 Difference]: Start difference. First operand 2466 states and 8633 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2021-05-21 21:32:53,713 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-21 21:32:54,362 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-05-21 21:32:54,517 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-21 21:32:54,656 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-21 21:32:54,992 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-05-21 21:32:55,293 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-21 21:32:55,451 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-05-21 21:32:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:56,261 INFO L93 Difference]: Finished difference Result 4518 states and 15011 transitions. [2021-05-21 21:32:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 21:32:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 29 [2021-05-21 21:32:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:56,268 INFO L225 Difference]: With dead ends: 4518 [2021-05-21 21:32:56,269 INFO L226 Difference]: Without dead ends: 4474 [2021-05-21 21:32:56,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3530.5ms TimeCoverageRelationStatistics Valid=810, Invalid=3746, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 21:32:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-05-21 21:32:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 2505. [2021-05-21 21:32:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.5027955271565494) internal successors, (8771), 2504 states have internal predecessors, (8771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8771 transitions. [2021-05-21 21:32:56,327 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8771 transitions. Word has length 29 [2021-05-21 21:32:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:56,327 INFO L482 AbstractCegarLoop]: Abstraction has 2505 states and 8771 transitions. [2021-05-21 21:32:56,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2021-05-21 21:32:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8771 transitions. [2021-05-21 21:32:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:32:56,330 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:56,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:56,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:56,539 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash -12576832, now seen corresponding path program 36 times [2021-05-21 21:32:56,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:56,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065021837] [2021-05-21 21:32:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:32:56,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:56,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065021837] [2021-05-21 21:32:56,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065021837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:56,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331800237] [2021-05-21 21:32:56,866 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 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 [2021-05-21 21:32:56,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:32:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:56,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:32:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:32:57,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-05-21 21:32:57,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:32:57,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,281 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-21 21:32:57,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-05-21 21:32:57,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:32:57,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,338 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-05-21 21:32:57,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-05-21 21:32:57,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:32:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-05-21 21:32:57,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-05-21 21:32:57,412 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-21 21:32:57,415 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:32:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:32:57,420 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 35 treesize of output 10 [2021-05-21 21:32:57,420 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-21 21:32:57,465 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-05-21 21:32:57,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-21 21:32:57,466 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:355, output treesize:35 [2021-05-21 21:32:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:32:57,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331800237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:57,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:57,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-21 21:32:57,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445917182] [2021-05-21 21:32:57,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:32:57,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:57,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:32:57,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:32:57,530 INFO L87 Difference]: Start difference. First operand 2505 states and 8771 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) [2021-05-21 21:32:59,148 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-05-21 21:32:59,392 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-05-21 21:32:59,730 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-05-21 21:33:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:00,149 INFO L93 Difference]: Finished difference Result 4394 states and 14553 transitions. [2021-05-21 21:33:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:33:00,149 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 29 [2021-05-21 21:33:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:00,155 INFO L225 Difference]: With dead ends: 4394 [2021-05-21 21:33:00,155 INFO L226 Difference]: Without dead ends: 4364 [2021-05-21 21:33:00,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2449.6ms TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:33:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-05-21 21:33:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 2537. [2021-05-21 21:33:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.5055205047318614) internal successors, (8890), 2536 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8890 transitions. [2021-05-21 21:33:00,195 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8890 transitions. Word has length 29 [2021-05-21 21:33:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:00,195 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 8890 transitions. [2021-05-21 21:33:00,195 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) [2021-05-21 21:33:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8890 transitions. [2021-05-21 21:33:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:33:00,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:00,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:00,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-05-21 21:33:00,398 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash -207836590, now seen corresponding path program 37 times [2021-05-21 21:33:00,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:00,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644858948] [2021-05-21 21:33:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:00,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:00,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644858948] [2021-05-21 21:33:00,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644858948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:00,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004983111] [2021-05-21 21:33:00,669 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 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 [2021-05-21 21:33:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:33:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004983111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:01,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-21 21:33:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116752011] [2021-05-21 21:33:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:33:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:33:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:33:01,109 INFO L87 Difference]: Start difference. First operand 2537 states and 8890 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-05-21 21:33:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:02,306 INFO L93 Difference]: Finished difference Result 3675 states and 12063 transitions. [2021-05-21 21:33:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:33:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 29 [2021-05-21 21:33:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:02,311 INFO L225 Difference]: With dead ends: 3675 [2021-05-21 21:33:02,311 INFO L226 Difference]: Without dead ends: 3645 [2021-05-21 21:33:02,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1295.9ms TimeCoverageRelationStatistics Valid=450, Invalid=1806, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:33:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2021-05-21 21:33:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 2550. [2021-05-21 21:33:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.507257748136524) internal successors, (8940), 2549 states have internal predecessors, (8940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8940 transitions. [2021-05-21 21:33:02,346 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8940 transitions. Word has length 29 [2021-05-21 21:33:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:02,346 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8940 transitions. [2021-05-21 21:33:02,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-05-21 21:33:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8940 transitions. [2021-05-21 21:33:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:33:02,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:02,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:02,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-05-21 21:33:02,549 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1152820346, now seen corresponding path program 25 times [2021-05-21 21:33:02,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:02,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684154291] [2021-05-21 21:33:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:02,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:02,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684154291] [2021-05-21 21:33:02,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684154291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:02,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409278801] [2021-05-21 21:33:02,932 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 [2021-05-21 21:33:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:33:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:07,291 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 42 Received shutdown request... [2021-05-21 21:33:21,558 WARN L222 SmtUtils]: Removed 11 from assertion stack [2021-05-21 21:33:21,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-05-21 21:33:21,759 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:33:21,760 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:33:21,762 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:33:21,762 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:33:21 BasicIcfg [2021-05-21 21:33:21,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:33:21,762 INFO L168 Benchmark]: Toolchain (without parser) took 857557.83 ms. Allocated memory was 354.4 MB in the beginning and 511.7 MB in the end (delta: 157.3 MB). Free memory was 333.6 MB in the beginning and 254.2 MB in the end (delta: 79.4 MB). Peak memory consumption was 235.7 MB. Max. memory is 16.0 GB. [2021-05-21 21:33:21,762 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 354.4 MB. Free memory is still 334.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:33:21,762 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.43 ms. Allocated memory is still 354.4 MB. Free memory was 333.6 MB in the beginning and 332.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:33:21,762 INFO L168 Benchmark]: Boogie Preprocessor took 24.92 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 331.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:33:21,762 INFO L168 Benchmark]: RCFGBuilder took 262.56 ms. Allocated memory is still 354.4 MB. Free memory was 331.0 MB in the beginning and 317.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:33:21,762 INFO L168 Benchmark]: TraceAbstraction took 857240.16 ms. Allocated memory was 354.4 MB in the beginning and 511.7 MB in the end (delta: 157.3 MB). Free memory was 317.2 MB in the beginning and 254.2 MB in the end (delta: 63.0 MB). Peak memory consumption was 221.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:33:21,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 354.4 MB. Free memory is still 334.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.43 ms. Allocated memory is still 354.4 MB. Free memory was 333.6 MB in the beginning and 332.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.92 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 331.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 262.56 ms. Allocated memory is still 354.4 MB. Free memory was 331.0 MB in the beginning and 317.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 857240.16 ms. Allocated memory was 354.4 MB in the beginning and 511.7 MB in the end (delta: 157.3 MB). Free memory was 317.2 MB in the beginning and 254.2 MB in the end (delta: 63.0 MB). Peak memory consumption was 221.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 102 for 14140ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 857160.4ms, OverallIterations: 100, TraceHistogramMax: 2, EmptinessCheckTime: 210.7ms, AutomataDifference: 629961.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4096 SDtfs, 22818 SDslu, 26111 SDs, 0 SdLazy, 42441 SolverSat, 3824 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 43864.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5051 GetRequests, 1980 SyntacticMatches, 73 SemanticMatches, 2998 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36385 ImplicationChecksByTransitivity, 740101.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2550occurred in iteration=99, InterpolantAutomatonStates: 2566, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2475.9ms AutomataMinimizationTime, 99 MinimizatonAttempts, 87106 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 340.7ms SsaConstructionTime, 1020.6ms SatisfiabilityAnalysisTime, 182554.1ms InterpolantComputationTime, 5124 NumberOfCodeBlocks, 5124 NumberOfCodeBlocksAsserted, 296 NumberOfCheckSat, 4934 ConstructedInterpolants, 60 QuantifiedInterpolants, 53856 SizeOfPredicates, 384 NumberOfNonLiveVariables, 5306 ConjunctsInSsa, 972 ConjunctsInUnsatCore, 190 InterpolantComputations, 8 PerfectInterpolantSequences, 247/879 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown